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Posted to commits@hugegraph.apache.org by ji...@apache.org on 2023/01/12 15:12:26 UTC

[incubator-hugegraph-toolchain] 04/05: chore(loader): fix license header & remove extra lines

This is an automated email from the ASF dual-hosted git repository.

jin pushed a commit to branch fix-header
in repository https://gitbox.apache.org/repos/asf/incubator-hugegraph-toolchain.git

commit 4f12ba7eee2dc753714f398ed7e4df6e43a67362
Author: imbajin <ji...@apache.org>
AuthorDate: Thu Jan 12 23:05:02 2023 +0800

    chore(loader): fix license header & remove extra lines
---
 hugegraph-loader/assembly/descriptor/assembly.xml  | 20 +++++++-----
 hugegraph-loader/assembly/static/bin/get-params.sh | 20 ++++++------
 .../static/bin/hugegraph-flinkcdc-loader.sh        | 20 ++++++------
 .../assembly/static/bin/hugegraph-loader.sh        | 20 ++++++------
 .../assembly/static/bin/hugegraph-spark-loader.sh  | 20 ++++++------
 .../assembly/static/bin/mapping-convert.sh         | 20 ++++++------
 .../assembly/static/bin/utf8-bom-to-utf8.sh        | 20 ++++++------
 hugegraph-loader/assembly/static/conf/log4j2.xml   | 20 +++++++-----
 .../assembly/static/example/file/schema.groovy     |  1 -
 .../assembly/static/example/hdfs/schema.groovy     |  1 -
 .../assembly/static/example/mysql/schema.groovy    |  1 -
 hugegraph-loader/assembly/travis/install-hadoop.sh | 20 ++++++------
 .../travis/install-hugegraph-from-source.sh        | 20 ++++++------
 .../assembly/travis/install-hugegraph-from-tar.sh  | 20 ++++++------
 hugegraph-loader/assembly/travis/install-mysql.sh  | 20 ++++++------
 hugegraph-loader/pom.xml                           | 20 +++++++-----
 .../apache/hugegraph/loader/HugeGraphLoader.java   |  1 -
 .../apache/hugegraph/loader/MappingConverter.java  |  1 -
 .../hugegraph/loader/builder/EdgeBuilder.java      |  1 -
 .../hugegraph/loader/builder/ElementBuilder.java   |  1 -
 .../apache/hugegraph/loader/builder/Record.java    |  1 -
 .../hugegraph/loader/builder/SchemaCache.java      |  1 -
 .../hugegraph/loader/builder/VertexBuilder.java    |  1 -
 .../loader/constant/AutoCloseableIterator.java     |  1 -
 .../hugegraph/loader/constant/Checkable.java       |  1 -
 .../hugegraph/loader/constant/Constants.java       |  1 -
 .../apache/hugegraph/loader/constant/ElemType.java |  1 -
 .../apache/hugegraph/loader/constant/Unique.java   |  1 -
 .../loader/direct/loader/DirectLoader.java         |  1 -
 .../loader/direct/loader/HBaseDirectLoader.java    |  1 -
 .../hugegraph/loader/direct/util/SinkToHBase.java  |  1 -
 .../hugegraph/loader/exception/InitException.java  |  1 -
 .../loader/exception/InsertException.java          |  1 -
 .../hugegraph/loader/exception/LoadException.java  |  1 -
 .../hugegraph/loader/exception/ParseException.java |  1 -
 .../hugegraph/loader/exception/ReadException.java  |  1 -
 .../loader/executor/ComputerLoadOptions.java       |  1 -
 .../hugegraph/loader/executor/GroovyExecutor.java  |  1 -
 .../hugegraph/loader/executor/LoadContext.java     |  1 -
 .../hugegraph/loader/executor/LoadOptions.java     |  1 -
 .../hugegraph/loader/failure/FailLogger.java       |  1 -
 .../hugegraph/loader/failure/FailWriter.java       |  1 -
 .../loader/flink/HugeGraphDeserialization.java     |  1 -
 .../loader/flink/HugeGraphFlinkCDCLoader.java      |  1 -
 .../loader/flink/HugeGraphOutputFormat.java        |  1 -
 .../loader/flink/HugeGraphSinkFunction.java        |  1 -
 .../hugegraph/loader/mapping/BackendStoreInfo.java |  1 -
 .../hugegraph/loader/mapping/EdgeMapping.java      |  1 -
 .../hugegraph/loader/mapping/ElementMapping.java   |  1 -
 .../hugegraph/loader/mapping/InputStruct.java      |  1 -
 .../hugegraph/loader/mapping/LoadMapping.java      |  1 -
 .../hugegraph/loader/mapping/VertexMapping.java    |  1 -
 .../loader/metrics/LoadDistributeMetrics.java      |  1 -
 .../hugegraph/loader/metrics/LoadMetrics.java      |  1 -
 .../hugegraph/loader/metrics/LoadReport.java       |  1 -
 .../hugegraph/loader/metrics/LoadSummary.java      |  1 -
 .../hugegraph/loader/metrics/RangesTimer.java      |  1 -
 .../hugegraph/loader/parser/CsvLineParser.java     |  1 -
 .../hugegraph/loader/parser/JsonLineParser.java    |  1 -
 .../apache/hugegraph/loader/parser/LineParser.java |  1 -
 .../hugegraph/loader/parser/TextLineParser.java    |  1 -
 .../loader/progress/FileItemProgress.java          |  1 -
 .../loader/progress/InputItemProgress.java         |  1 -
 .../hugegraph/loader/progress/InputProgress.java   |  1 -
 .../hugegraph/loader/progress/LoadProgress.java    |  1 -
 .../hugegraph/loader/reader/AbstractReader.java    |  1 -
 .../hugegraph/loader/reader/InputReader.java       |  1 -
 .../apache/hugegraph/loader/reader/Readable.java   |  1 -
 .../loader/reader/file/FileLineFetcher.java        |  1 -
 .../hugegraph/loader/reader/file/FileReader.java   |  1 -
 .../loader/reader/file/LocalFileReader.java        |  1 -
 .../loader/reader/file/OrcFileLineFetcher.java     |  1 -
 .../loader/reader/file/ParquetFileLineFetcher.java |  1 -
 .../loader/reader/hdfs/HDFSFileReader.java         |  1 -
 .../hugegraph/loader/reader/jdbc/JDBCReader.java   |  1 -
 .../hugegraph/loader/reader/jdbc/JDBCUtil.java     |  1 -
 .../hugegraph/loader/reader/jdbc/RowFetcher.java   |  1 -
 .../apache/hugegraph/loader/reader/line/Line.java  |  1 -
 .../hugegraph/loader/reader/line/LineFetcher.java  |  1 -
 .../loader/serializer/DeserializeException.java    |  1 -
 .../loader/serializer/InputProgressDeser.java      |  1 -
 .../loader/serializer/InputSourceDeser.java        |  1 -
 .../hugegraph/loader/source/AbstractSource.java    |  1 -
 .../hugegraph/loader/source/InputSource.java       |  1 -
 .../apache/hugegraph/loader/source/SourceType.java |  1 -
 .../hugegraph/loader/source/file/Compression.java  |  1 -
 .../hugegraph/loader/source/file/FileFilter.java   |  1 -
 .../hugegraph/loader/source/file/FileFormat.java   |  1 -
 .../hugegraph/loader/source/file/FileSource.java   |  1 -
 .../hugegraph/loader/source/file/ListFormat.java   |  1 -
 .../hugegraph/loader/source/file/SkippedLine.java  |  1 -
 .../hugegraph/loader/source/hdfs/HDFSSource.java   |  1 -
 .../loader/source/hdfs/KerberosConfig.java         |  1 -
 .../hugegraph/loader/source/jdbc/JDBCSource.java   |  1 -
 .../hugegraph/loader/source/jdbc/JDBCVendor.java   |  1 -
 .../loader/spark/HugeGraphSparkLoader.java         |  1 -
 .../hugegraph/loader/struct/EdgeStructV1.java      |  1 -
 .../hugegraph/loader/struct/ElementStructV1.java   |  1 -
 .../hugegraph/loader/struct/GraphStructV1.java     |  1 -
 .../hugegraph/loader/struct/VertexStructV1.java    |  1 -
 .../hugegraph/loader/task/BatchInsertTask.java     |  1 -
 .../apache/hugegraph/loader/task/InsertTask.java   |  1 -
 .../hugegraph/loader/task/ParseTaskBuilder.java    |  1 -
 .../hugegraph/loader/task/SingleInsertTask.java    |  1 -
 .../apache/hugegraph/loader/task/TaskManager.java  |  1 -
 .../apache/hugegraph/loader/util/DataTypeUtil.java |  1 -
 .../org/apache/hugegraph/loader/util/DateUtil.java |  1 -
 .../hugegraph/loader/util/HugeClientHolder.java    |  1 -
 .../org/apache/hugegraph/loader/util/JsonUtil.java |  1 -
 .../org/apache/hugegraph/loader/util/LoadUtil.java |  1 -
 .../apache/hugegraph/loader/util/MappingUtil.java  |  1 -
 .../apache/hugegraph/loader/util/ParquetUtil.java  |  1 -
 .../org/apache/hugegraph/loader/util/Printer.java  |  1 -
 hugegraph-loader/src/main/resources/log4j2.xml     | 20 +++++++-----
 .../hugegraph/loader/test/functional/DBUtil.java   |  1 -
 .../loader/test/functional/FileLoadTest.java       |  1 -
 .../hugegraph/loader/test/functional/FileUtil.java |  1 -
 .../loader/test/functional/HDFSLoadTest.java       |  1 -
 .../hugegraph/loader/test/functional/HDFSUtil.java |  1 -
 .../hugegraph/loader/test/functional/IOUtil.java   |  1 -
 .../loader/test/functional/JDBCLoadTest.java       |  1 -
 .../hugegraph/loader/test/functional/LoadTest.java |  1 -
 .../hugegraph/loader/test/unit/DateUtilTest.java   |  1 -
 .../hugegraph/loader/test/unit/LineTest.java       |  1 -
 .../loader/test/unit/LoadProgressTest.java         |  1 -
 .../loader/test/unit/MappingConverterTest.java     |  1 -
 .../loader/test/unit/RangesTimerTest.java          |  1 -
 .../hugegraph/loader/test/unit/UnitTestSuite.java  |  1 -
 .../test/resources/bz2_compress_file/schema.groovy |  1 -
 .../clear_schema_before_load/schema.groovy         |  1 -
 .../customized_delimiter_in_csv_file/schema.groovy |  1 -
 .../resources/customized_long_id/schema.groovy     |  1 -
 .../resources/customized_number_id/schema.groovy   |  1 -
 .../test/resources/customized_schema/schema.groovy |  1 -
 .../customized_timezone_gmt0/schema.groovy         |  1 -
 .../test/resources/customized_uuid/schema.groovy   |  1 -
 .../resources/default_timezone_gmt8/schema.groovy  |  1 -
 .../resources/deflate_compress_file/schema.groovy  |  1 -
 .../resources/dir_has_multi_files/schema.groovy    |  1 -
 .../test/resources/dir_has_no_file/schema.groovy   |  1 -
 .../schema.groovy                                  |  1 -
 .../edge_unfold_many_to_many/schema.groovy         |  1 -
 .../schema.groovy                                  |  1 -
 .../edge_unfold_many_to_one/schema.groovy          |  1 -
 .../edge_unfold_one_to_many/schema.groovy          |  1 -
 .../resources/empty_file_with_header/schema.groovy |  1 -
 .../empty_file_without_header/schema.groovy        |  1 -
 .../resources/file_has_empty_line/schema.groovy    |  1 -
 .../file_has_skipped_line_regex/schema.groovy      |  1 -
 .../test/resources/file_no_header/schema.groovy    |  1 -
 .../fill_missing_column_with_empty/schema.groovy   |  1 -
 .../resources/filter_file_by_suffix/schema.groovy  |  1 -
 .../resources/filter_path_by_suffix/schema.groovy  |  1 -
 .../resources/gzip_compress_file/schema.groovy     |  1 -
 .../hdfs_with_core_site_path/core-site.xml         | 20 +++++++-----
 .../hdfs_with_core_site_path/schema.groovy         |  1 -
 .../hdfs_with_empty_core_site_path/schema.groovy   |  1 -
 .../hdfs_with_invalid_core_site_path/core-site.xml | 20 +++++++-----
 .../hdfs_with_invalid_core_site_path/schema.groovy |  1 -
 .../hdfs_with_unexist_core_site_path/core-site.xml | 20 +++++++-----
 .../hdfs_with_unexist_core_site_path/schema.groovy |  1 -
 .../test/resources/header_is_empty/schema.groovy   |  1 -
 .../resources/id_field_as_property/schema.groovy   |  1 -
 .../ignore_null_value_columns/schema.groovy        |  1 -
 .../schema.groovy                                  |  1 -
 .../test/resources/ignored_fields/schema.groovy    |  1 -
 .../schema.groovy                                  |  1 -
 .../resources/jdbc_customized_schema/schema.groovy |  1 -
 .../resources/jdbc_value_mapping/schema.groovy     |  1 -
 .../src/test/resources/long_property/schema.groovy |  1 -
 .../lz4_block_compress_file/schema.groovy          |  1 -
 .../lz4_framed_compress_file/schema.groovy         |  1 -
 .../resources/lzma_compress_file/schema.groovy     |  1 -
 .../schema.groovy                                  |  1 -
 .../src/test/resources/mapping_v2/schema.groovy    |  1 -
 .../matched_date_property_format/schema.groovy     | 38 +++-------------------
 .../matched_encoding_charset/schema.groovy         |  1 -
 .../schema.groovy                                  |  1 -
 .../multi_files_have_header/schema.groovy          |  1 -
 .../number_and_date_pks_encoded/schema.groovy      |  1 -
 .../test/resources/orc_compress_file/schema.groovy |  1 -
 .../resources/parquet_compress_file/core-site.xml  | 20 +++++++-----
 .../resources/parquet_compress_file/schema.groovy  |  1 -
 .../resources/parse_empty_csv_line/schema.groovy   |  1 -
 .../test/resources/pk_value_mapping/schema.groovy  |  1 -
 .../resources/read_reached_max_lines/schema.groovy |  1 -
 .../reload_json_failure_files/schema.groovy        |  1 -
 .../selected_and_ignored_fields/schema.groovy      |  1 -
 .../test/resources/selected_fields/schema.groovy   |  1 -
 .../schema.groovy                                  |  1 -
 .../src/test/resources/skip_struct/schema.groovy   |  1 -
 .../snappy_framed_compress_file/schema.groovy      |  1 -
 .../snappy_raw_compress_file/schema.groovy         |  1 -
 .../source_or_target_pk_value_empty/schema.groovy  |  1 -
 .../source_or_target_pk_value_null/schema.groovy   |  1 -
 .../source_target_value_mapping/schema.groovy      |  1 -
 .../timestamp_as_dateformat/schema.groovy          |  1 -
 .../test/resources/too_few_columns/schema.groovy   |  1 -
 .../test/resources/too_many_columns/schema.groovy  |  1 -
 .../unmatched_date_property_format/schema.groovy   |  1 -
 .../unmatched_encoding_charset/schema.groovy       |  1 -
 .../unmatched_property_datatype/schema.groovy      |  1 -
 .../resources/update_by_strategy/schema.groovy     |  1 -
 .../schema.groovy                                  |  1 -
 .../value_boolean_property_in_file/schema.groovy   |  1 -
 .../schema.groovy                                  |  1 -
 .../value_list_property_in_json_file/schema.groovy |  1 -
 .../value_list_property_in_text_file/schema.groovy |  1 -
 .../schema.groovy                                  |  1 -
 .../schema.groovy                                  |  1 -
 .../src/test/resources/value_mapping/schema.groovy |  1 -
 .../value_mapping_in_json_file/schema.groovy       |  1 -
 .../value_set_property_in_json_file/schema.groovy  |  1 -
 .../value_set_property_in_text_file/schema.groovy  |  1 -
 .../value_uuid_property_in_file/schema.groovy      |  1 -
 .../vertex_customized_id_unfold/schema.groovy      |  1 -
 .../schema.groovy                                  |  1 -
 .../resources/vertex_id_column_empty/schema.groovy |  1 -
 .../resources/vertex_id_exceed_limit/schema.groovy |  1 -
 .../vertex_id_exceed_limit_in_bytes/schema.groovy  |  1 -
 .../test/resources/vertex_joint_pks/schema.groovy  |  1 -
 .../schema.groovy                                  |  1 -
 .../resources/vertex_pk_value_empty/schema.groovy  |  1 -
 .../resources/vertex_pk_value_null/schema.groovy   |  1 -
 .../vertex_primarykey_unfold/schema.groovy         |  1 -
 .../schema.groovy                                  |  1 -
 .../schema.groovy                                  |  1 -
 .../vertex_unfold_in_json_file/schema.groovy       |  1 -
 .../test/resources/xz_compress_file/schema.groovy  |  1 -
 .../test/resources/z_compress_file/schema.groovy   |  1 -
 230 files changed, 192 insertions(+), 417 deletions(-)

diff --git a/hugegraph-loader/assembly/descriptor/assembly.xml b/hugegraph-loader/assembly/descriptor/assembly.xml
index 37bb81c0..62fe6793 100644
--- a/hugegraph-loader/assembly/descriptor/assembly.xml
+++ b/hugegraph-loader/assembly/descriptor/assembly.xml
@@ -1,16 +1,18 @@
 <!--
   Licensed to the Apache Software Foundation (ASF) under one or more
-  contributor license agreements.  See the NOTICE file distributed with
-  this work for additional information regarding copyright ownership.
-  The ASF licenses this file to You under the Apache License, Version 2.0
-  (the "License"); you may not use this file except in compliance with
-  the License.  You may obtain a copy of the License at
+  contributor license agreements. See the NOTICE file distributed with this
+  work for additional information regarding copyright ownership. The ASF
+  licenses this file to You under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
       http://www.apache.org/licenses/LICENSE-2.0
+
   Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
+  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+  License for the specific language governing permissions and limitations
+  under the License.
   -->
 <assembly>
     <id>distribution</id>
diff --git a/hugegraph-loader/assembly/static/bin/get-params.sh b/hugegraph-loader/assembly/static/bin/get-params.sh
index b9040de1..dde3f0c7 100644
--- a/hugegraph-loader/assembly/static/bin/get-params.sh
+++ b/hugegraph-loader/assembly/static/bin/get-params.sh
@@ -1,19 +1,19 @@
 #!/bin/bash
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# contributor license agreements. See the NOTICE file distributed with this
+# work for additional information regarding copyright ownership. The ASF
+# licenses this file to You under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
 #
 
 function get_params() {
diff --git a/hugegraph-loader/assembly/static/bin/hugegraph-flinkcdc-loader.sh b/hugegraph-loader/assembly/static/bin/hugegraph-flinkcdc-loader.sh
index 2cd65d96..7a6eacc4 100755
--- a/hugegraph-loader/assembly/static/bin/hugegraph-flinkcdc-loader.sh
+++ b/hugegraph-loader/assembly/static/bin/hugegraph-flinkcdc-loader.sh
@@ -1,19 +1,19 @@
 #!/bin/bash
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# contributor license agreements. See the NOTICE file distributed with this
+# work for additional information regarding copyright ownership. The ASF
+# licenses this file to You under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
 #
 BIN_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 APP_DIR=$(dirname "${BIN_DIR}")
diff --git a/hugegraph-loader/assembly/static/bin/hugegraph-loader.sh b/hugegraph-loader/assembly/static/bin/hugegraph-loader.sh
index 23615e5b..8f403b79 100755
--- a/hugegraph-loader/assembly/static/bin/hugegraph-loader.sh
+++ b/hugegraph-loader/assembly/static/bin/hugegraph-loader.sh
@@ -1,19 +1,19 @@
 #!/bin/bash
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# contributor license agreements. See the NOTICE file distributed with this
+# work for additional information regarding copyright ownership. The ASF
+# licenses this file to You under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
 #
 abs_path() {
     SOURCE="${BASH_SOURCE[0]}"
diff --git a/hugegraph-loader/assembly/static/bin/hugegraph-spark-loader.sh b/hugegraph-loader/assembly/static/bin/hugegraph-spark-loader.sh
index 6aa38439..0e00d4e7 100755
--- a/hugegraph-loader/assembly/static/bin/hugegraph-spark-loader.sh
+++ b/hugegraph-loader/assembly/static/bin/hugegraph-spark-loader.sh
@@ -1,19 +1,19 @@
 #!/bin/bash
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# contributor license agreements. See the NOTICE file distributed with this
+# work for additional information regarding copyright ownership. The ASF
+# licenses this file to You under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
 #
 BIN_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 APP_DIR=$(dirname "${BIN_DIR}")
diff --git a/hugegraph-loader/assembly/static/bin/mapping-convert.sh b/hugegraph-loader/assembly/static/bin/mapping-convert.sh
index 2173c1af..75dede27 100755
--- a/hugegraph-loader/assembly/static/bin/mapping-convert.sh
+++ b/hugegraph-loader/assembly/static/bin/mapping-convert.sh
@@ -1,19 +1,19 @@
 #!/bin/bash
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# contributor license agreements. See the NOTICE file distributed with this
+# work for additional information regarding copyright ownership. The ASF
+# licenses this file to You under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
 #
 export LANG=zh_CN.UTF-8
 set -e
diff --git a/hugegraph-loader/assembly/static/bin/utf8-bom-to-utf8.sh b/hugegraph-loader/assembly/static/bin/utf8-bom-to-utf8.sh
index 76138cd2..b461ca27 100755
--- a/hugegraph-loader/assembly/static/bin/utf8-bom-to-utf8.sh
+++ b/hugegraph-loader/assembly/static/bin/utf8-bom-to-utf8.sh
@@ -1,19 +1,19 @@
 #!/usr/bin/env bash
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# contributor license agreements. See the NOTICE file distributed with this
+# work for additional information regarding copyright ownership. The ASF
+# licenses this file to You under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
 #
 if [[ -z "$1" ]]; then
     echo "Usageļ¼š$0 [folder | file]"
diff --git a/hugegraph-loader/assembly/static/conf/log4j2.xml b/hugegraph-loader/assembly/static/conf/log4j2.xml
index 53758f36..10330788 100644
--- a/hugegraph-loader/assembly/static/conf/log4j2.xml
+++ b/hugegraph-loader/assembly/static/conf/log4j2.xml
@@ -1,17 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
   Licensed to the Apache Software Foundation (ASF) under one or more
-  contributor license agreements.  See the NOTICE file distributed with
-  this work for additional information regarding copyright ownership.
-  The ASF licenses this file to You under the Apache License, Version 2.0
-  (the "License"); you may not use this file except in compliance with
-  the License.  You may obtain a copy of the License at
+  contributor license agreements. See the NOTICE file distributed with this
+  work for additional information regarding copyright ownership. The ASF
+  licenses this file to You under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
       http://www.apache.org/licenses/LICENSE-2.0
+
   Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
+  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+  License for the specific language governing permissions and limitations
+  under the License.
   -->
 <configuration status="error">
     <Properties>
diff --git a/hugegraph-loader/assembly/static/example/file/schema.groovy b/hugegraph-loader/assembly/static/example/file/schema.groovy
index f8ded2d4..a5f6f66c 100644
--- a/hugegraph-loader/assembly/static/example/file/schema.groovy
+++ b/hugegraph-loader/assembly/static/example/file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/assembly/static/example/hdfs/schema.groovy b/hugegraph-loader/assembly/static/example/hdfs/schema.groovy
index f8ded2d4..a5f6f66c 100644
--- a/hugegraph-loader/assembly/static/example/hdfs/schema.groovy
+++ b/hugegraph-loader/assembly/static/example/hdfs/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/assembly/static/example/mysql/schema.groovy b/hugegraph-loader/assembly/static/example/mysql/schema.groovy
index ab2c0df4..ed703574 100644
--- a/hugegraph-loader/assembly/static/example/mysql/schema.groovy
+++ b/hugegraph-loader/assembly/static/example/mysql/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/assembly/travis/install-hadoop.sh b/hugegraph-loader/assembly/travis/install-hadoop.sh
index 3e21346a..54486816 100755
--- a/hugegraph-loader/assembly/travis/install-hadoop.sh
+++ b/hugegraph-loader/assembly/travis/install-hadoop.sh
@@ -1,19 +1,19 @@
 #!/bin/bash
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# contributor license agreements. See the NOTICE file distributed with this
+# work for additional information regarding copyright ownership. The ASF
+# licenses this file to You under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
 #
 set -ev
 
diff --git a/hugegraph-loader/assembly/travis/install-hugegraph-from-source.sh b/hugegraph-loader/assembly/travis/install-hugegraph-from-source.sh
index e668c374..60adcfac 100755
--- a/hugegraph-loader/assembly/travis/install-hugegraph-from-source.sh
+++ b/hugegraph-loader/assembly/travis/install-hugegraph-from-source.sh
@@ -1,19 +1,19 @@
 #!/bin/bash
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# contributor license agreements. See the NOTICE file distributed with this
+# work for additional information regarding copyright ownership. The ASF
+# licenses this file to You under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
 #
 set -ev
 
diff --git a/hugegraph-loader/assembly/travis/install-hugegraph-from-tar.sh b/hugegraph-loader/assembly/travis/install-hugegraph-from-tar.sh
index aab8ca69..afe1c859 100755
--- a/hugegraph-loader/assembly/travis/install-hugegraph-from-tar.sh
+++ b/hugegraph-loader/assembly/travis/install-hugegraph-from-tar.sh
@@ -1,19 +1,19 @@
 #!/bin/bash
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# contributor license agreements. See the NOTICE file distributed with this
+# work for additional information regarding copyright ownership. The ASF
+# licenses this file to You under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
 #
 set -ev
 
diff --git a/hugegraph-loader/assembly/travis/install-mysql.sh b/hugegraph-loader/assembly/travis/install-mysql.sh
index a8441479..fcc12c1e 100755
--- a/hugegraph-loader/assembly/travis/install-mysql.sh
+++ b/hugegraph-loader/assembly/travis/install-mysql.sh
@@ -1,19 +1,19 @@
 #!/bin/bash
 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
+# contributor license agreements. See the NOTICE file distributed with this
+# work for additional information regarding copyright ownership. The ASF
+# licenses this file to You under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
 #
-#    http://www.apache.org/licenses/LICENSE-2.0
+#     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
 #
 set -ev
 
diff --git a/hugegraph-loader/pom.xml b/hugegraph-loader/pom.xml
index 419ec33c..db0c3bbb 100644
--- a/hugegraph-loader/pom.xml
+++ b/hugegraph-loader/pom.xml
@@ -1,17 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
   Licensed to the Apache Software Foundation (ASF) under one or more
-  contributor license agreements.  See the NOTICE file distributed with
-  this work for additional information regarding copyright ownership.
-  The ASF licenses this file to You under the Apache License, Version 2.0
-  (the "License"); you may not use this file except in compliance with
-  the License.  You may obtain a copy of the License at
+  contributor license agreements. See the NOTICE file distributed with this
+  work for additional information regarding copyright ownership. The ASF
+  licenses this file to You under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
       http://www.apache.org/licenses/LICENSE-2.0
+
   Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
+  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+  License for the specific language governing permissions and limitations
+  under the License.
   -->
 <project xmlns="http://maven.apache.org/POM/4.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/HugeGraphLoader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/HugeGraphLoader.java
index 3db3a5a7..95aca981 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/HugeGraphLoader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/HugeGraphLoader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/MappingConverter.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/MappingConverter.java
index 2ff19c1b..983b6f40 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/MappingConverter.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/MappingConverter.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/EdgeBuilder.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/EdgeBuilder.java
index 63e4e311..7237b210 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/EdgeBuilder.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/EdgeBuilder.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/ElementBuilder.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/ElementBuilder.java
index 01cbce79..69d6d0d3 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/ElementBuilder.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/ElementBuilder.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/Record.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/Record.java
index 6a03146d..c138d586 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/Record.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/Record.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/SchemaCache.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/SchemaCache.java
index c3c4c089..cc0b8e00 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/SchemaCache.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/SchemaCache.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/VertexBuilder.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/VertexBuilder.java
index 73576b41..c8470869 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/VertexBuilder.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/builder/VertexBuilder.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/AutoCloseableIterator.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/AutoCloseableIterator.java
index 001ed78e..e8abfe41 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/AutoCloseableIterator.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/AutoCloseableIterator.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Checkable.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Checkable.java
index 5b799efa..9dd03a93 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Checkable.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Checkable.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Constants.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Constants.java
index ea0c6925..d2abeab9 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Constants.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Constants.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/ElemType.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/ElemType.java
index 6ea6e81a..ad6705fe 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/ElemType.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/ElemType.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Unique.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Unique.java
index a10e5691..768771c2 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Unique.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/constant/Unique.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/loader/DirectLoader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/loader/DirectLoader.java
index 54cf0430..f99e4a49 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/loader/DirectLoader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/loader/DirectLoader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/loader/HBaseDirectLoader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/loader/HBaseDirectLoader.java
index 6d6626d8..7456e927 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/loader/HBaseDirectLoader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/loader/HBaseDirectLoader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/util/SinkToHBase.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/util/SinkToHBase.java
index a5b16079..96b67b98 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/util/SinkToHBase.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/direct/util/SinkToHBase.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/InitException.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/InitException.java
index bacd0452..d5a56781 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/InitException.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/InitException.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/InsertException.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/InsertException.java
index 51e77c2c..ce510e40 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/InsertException.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/InsertException.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/LoadException.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/LoadException.java
index 04a09774..ff14aa0a 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/LoadException.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/LoadException.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/ParseException.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/ParseException.java
index daebc3ef..1c7a1963 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/ParseException.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/ParseException.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/ReadException.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/ReadException.java
index 22f674dd..008391b7 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/ReadException.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/exception/ReadException.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/ComputerLoadOptions.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/ComputerLoadOptions.java
index 03d24f7a..812f4096 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/ComputerLoadOptions.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/ComputerLoadOptions.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/GroovyExecutor.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/GroovyExecutor.java
index 9b0cd80f..84420240 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/GroovyExecutor.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/GroovyExecutor.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/LoadContext.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/LoadContext.java
index e01fc542..0be364bb 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/LoadContext.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/LoadContext.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/LoadOptions.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/LoadOptions.java
index 75404ff2..fb2a7d9d 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/LoadOptions.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/executor/LoadOptions.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/failure/FailLogger.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/failure/FailLogger.java
index 0dc599f4..be21c5ae 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/failure/FailLogger.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/failure/FailLogger.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/failure/FailWriter.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/failure/FailWriter.java
index 91bcb333..982e51fb 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/failure/FailWriter.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/failure/FailWriter.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphDeserialization.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphDeserialization.java
index d947b006..7bed7774 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphDeserialization.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphDeserialization.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphFlinkCDCLoader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphFlinkCDCLoader.java
index 35ac76d3..09ccded6 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphFlinkCDCLoader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphFlinkCDCLoader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphOutputFormat.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphOutputFormat.java
index ec165b06..7bfefa16 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphOutputFormat.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphOutputFormat.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphSinkFunction.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphSinkFunction.java
index 17f5f20c..f480feae 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphSinkFunction.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/flink/HugeGraphSinkFunction.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/BackendStoreInfo.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/BackendStoreInfo.java
index f56d2bb6..fb8b466e 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/BackendStoreInfo.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/BackendStoreInfo.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/EdgeMapping.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/EdgeMapping.java
index 7426257a..4094f918 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/EdgeMapping.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/EdgeMapping.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/ElementMapping.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/ElementMapping.java
index 20d16a99..cf0bf07d 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/ElementMapping.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/ElementMapping.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/InputStruct.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/InputStruct.java
index 9b8920c6..9c17439e 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/InputStruct.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/InputStruct.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/LoadMapping.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/LoadMapping.java
index 90b4cef9..2649cdfb 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/LoadMapping.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/LoadMapping.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/VertexMapping.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/VertexMapping.java
index 39bb49a9..a9910bd0 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/VertexMapping.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/mapping/VertexMapping.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadDistributeMetrics.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadDistributeMetrics.java
index 7d0f9da9..baf25515 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadDistributeMetrics.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadDistributeMetrics.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadMetrics.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadMetrics.java
index d71c64ad..43370b5a 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadMetrics.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadMetrics.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadReport.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadReport.java
index 5ee09c9b..d0e7dced 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadReport.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadReport.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadSummary.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadSummary.java
index 90d1e254..dda1dd09 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadSummary.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/LoadSummary.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/RangesTimer.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/RangesTimer.java
index daa94750..b9f923cc 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/RangesTimer.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/metrics/RangesTimer.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/CsvLineParser.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/CsvLineParser.java
index 8cdf612b..7cc4e55e 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/CsvLineParser.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/CsvLineParser.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/JsonLineParser.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/JsonLineParser.java
index 6ddf26ae..106b5008 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/JsonLineParser.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/JsonLineParser.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/LineParser.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/LineParser.java
index 7f3de862..d659a822 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/LineParser.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/LineParser.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/TextLineParser.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/TextLineParser.java
index aefa781e..644251bc 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/TextLineParser.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/parser/TextLineParser.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/FileItemProgress.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/FileItemProgress.java
index 13b35c27..84caf0de 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/FileItemProgress.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/FileItemProgress.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/InputItemProgress.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/InputItemProgress.java
index 86d573a0..a1c78b71 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/InputItemProgress.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/InputItemProgress.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/InputProgress.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/InputProgress.java
index b457899e..d4feaa1f 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/InputProgress.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/InputProgress.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/LoadProgress.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/LoadProgress.java
index 8d33f4c7..d5468b6c 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/LoadProgress.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/progress/LoadProgress.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/AbstractReader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/AbstractReader.java
index b9978fed..5f263a12 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/AbstractReader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/AbstractReader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/InputReader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/InputReader.java
index 07b98d51..8e6599f9 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/InputReader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/InputReader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/Readable.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/Readable.java
index 94756a63..a9b2097e 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/Readable.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/Readable.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/FileLineFetcher.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/FileLineFetcher.java
index 71c9d192..636d954d 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/FileLineFetcher.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/FileLineFetcher.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/FileReader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/FileReader.java
index ba1ce0b8..a4d86a51 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/FileReader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/FileReader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/LocalFileReader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/LocalFileReader.java
index d096d650..d41ac49d 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/LocalFileReader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/LocalFileReader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/OrcFileLineFetcher.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/OrcFileLineFetcher.java
index 5bb14331..9191adeb 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/OrcFileLineFetcher.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/OrcFileLineFetcher.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/ParquetFileLineFetcher.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/ParquetFileLineFetcher.java
index 3382fede..38638f4a 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/ParquetFileLineFetcher.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/file/ParquetFileLineFetcher.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/hdfs/HDFSFileReader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/hdfs/HDFSFileReader.java
index 401822db..93f8b545 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/hdfs/HDFSFileReader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/hdfs/HDFSFileReader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/JDBCReader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/JDBCReader.java
index c824fd04..3fdf1b0c 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/JDBCReader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/JDBCReader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/JDBCUtil.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/JDBCUtil.java
index b3ef4c87..0d09816c 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/JDBCUtil.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/JDBCUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/RowFetcher.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/RowFetcher.java
index 77168318..e00f31d7 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/RowFetcher.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/jdbc/RowFetcher.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/line/Line.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/line/Line.java
index 0f130246..ebc736cd 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/line/Line.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/line/Line.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/line/LineFetcher.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/line/LineFetcher.java
index e97ceba3..006dee36 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/line/LineFetcher.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/reader/line/LineFetcher.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/DeserializeException.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/DeserializeException.java
index 9ac0ef11..a6c8a145 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/DeserializeException.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/DeserializeException.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/InputProgressDeser.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/InputProgressDeser.java
index b9041759..58509221 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/InputProgressDeser.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/InputProgressDeser.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/InputSourceDeser.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/InputSourceDeser.java
index 36149202..37dcef81 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/InputSourceDeser.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/serializer/InputSourceDeser.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/AbstractSource.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/AbstractSource.java
index 58b2bf51..cb0e0033 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/AbstractSource.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/AbstractSource.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/InputSource.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/InputSource.java
index be930d26..6bc09bff 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/InputSource.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/InputSource.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/SourceType.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/SourceType.java
index 355978fc..ed54933f 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/SourceType.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/SourceType.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/Compression.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/Compression.java
index f9ea37b8..2d62ff01 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/Compression.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/Compression.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileFilter.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileFilter.java
index 710acab5..ca9f2e6d 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileFilter.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileFilter.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileFormat.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileFormat.java
index 93fdbbf3..13dd593b 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileFormat.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileFormat.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileSource.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileSource.java
index 74458322..a0c0c9fd 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileSource.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/FileSource.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/ListFormat.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/ListFormat.java
index bda243b7..2f8e0588 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/ListFormat.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/ListFormat.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/SkippedLine.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/SkippedLine.java
index bd12a2bb..d70f5e46 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/SkippedLine.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/file/SkippedLine.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/hdfs/HDFSSource.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/hdfs/HDFSSource.java
index 2ef75cc5..3741ce01 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/hdfs/HDFSSource.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/hdfs/HDFSSource.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/hdfs/KerberosConfig.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/hdfs/KerberosConfig.java
index f3e6b8f5..6358ce15 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/hdfs/KerberosConfig.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/hdfs/KerberosConfig.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/jdbc/JDBCSource.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/jdbc/JDBCSource.java
index 41b100fd..b4193e9d 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/jdbc/JDBCSource.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/jdbc/JDBCSource.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/jdbc/JDBCVendor.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/jdbc/JDBCVendor.java
index 633abf78..dc5833b6 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/jdbc/JDBCVendor.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/source/jdbc/JDBCVendor.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/spark/HugeGraphSparkLoader.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/spark/HugeGraphSparkLoader.java
index 5d7722bc..60c7837f 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/spark/HugeGraphSparkLoader.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/spark/HugeGraphSparkLoader.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/EdgeStructV1.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/EdgeStructV1.java
index b56593d3..4e3dfde2 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/EdgeStructV1.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/EdgeStructV1.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/ElementStructV1.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/ElementStructV1.java
index ca23285c..d0cdb36a 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/ElementStructV1.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/ElementStructV1.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/GraphStructV1.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/GraphStructV1.java
index a4ecc2a6..1bd5fae5 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/GraphStructV1.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/GraphStructV1.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/VertexStructV1.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/VertexStructV1.java
index c942e853..160db1a8 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/VertexStructV1.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/struct/VertexStructV1.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/BatchInsertTask.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/BatchInsertTask.java
index 159e44a6..992f4149 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/BatchInsertTask.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/BatchInsertTask.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/InsertTask.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/InsertTask.java
index 8a9a892c..b773f3fe 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/InsertTask.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/InsertTask.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/ParseTaskBuilder.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/ParseTaskBuilder.java
index 4d1a905e..fc12f8a7 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/ParseTaskBuilder.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/ParseTaskBuilder.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/SingleInsertTask.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/SingleInsertTask.java
index 607a9f59..d210b321 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/SingleInsertTask.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/SingleInsertTask.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/TaskManager.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/TaskManager.java
index a28dc4e5..ce4d77a9 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/TaskManager.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/task/TaskManager.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/DataTypeUtil.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/DataTypeUtil.java
index aca2b36e..4e066d45 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/DataTypeUtil.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/DataTypeUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/DateUtil.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/DateUtil.java
index 05e5f502..670c70a0 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/DateUtil.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/DateUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/HugeClientHolder.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/HugeClientHolder.java
index e9066375..31d21ddb 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/HugeClientHolder.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/HugeClientHolder.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/JsonUtil.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/JsonUtil.java
index 894ec6ed..c42f4b76 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/JsonUtil.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/JsonUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/LoadUtil.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/LoadUtil.java
index f1b5ad43..823ce3d3 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/LoadUtil.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/LoadUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/MappingUtil.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/MappingUtil.java
index 2f7f87c5..25635c4a 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/MappingUtil.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/MappingUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/ParquetUtil.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/ParquetUtil.java
index b9fc86de..792cad47 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/ParquetUtil.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/ParquetUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/Printer.java b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/Printer.java
index 0ec4ae9d..ccc06270 100644
--- a/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/Printer.java
+++ b/hugegraph-loader/src/main/java/org/apache/hugegraph/loader/util/Printer.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/main/resources/log4j2.xml b/hugegraph-loader/src/main/resources/log4j2.xml
index 3014d814..7ef6ba64 100644
--- a/hugegraph-loader/src/main/resources/log4j2.xml
+++ b/hugegraph-loader/src/main/resources/log4j2.xml
@@ -1,17 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
   Licensed to the Apache Software Foundation (ASF) under one or more
-  contributor license agreements.  See the NOTICE file distributed with
-  this work for additional information regarding copyright ownership.
-  The ASF licenses this file to You under the Apache License, Version 2.0
-  (the "License"); you may not use this file except in compliance with
-  the License.  You may obtain a copy of the License at
+  contributor license agreements. See the NOTICE file distributed with this
+  work for additional information regarding copyright ownership. The ASF
+  licenses this file to You under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
       http://www.apache.org/licenses/LICENSE-2.0
+
   Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
+  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+  License for the specific language governing permissions and limitations
+  under the License.
   -->
 <configuration status="error">
     <Properties>
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/DBUtil.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/DBUtil.java
index 759b718e..58abdc1a 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/DBUtil.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/DBUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/FileLoadTest.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/FileLoadTest.java
index b26a0577..8a4eac1e 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/FileLoadTest.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/FileLoadTest.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/FileUtil.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/FileUtil.java
index b37b21ca..ed80efbe 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/FileUtil.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/FileUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/HDFSLoadTest.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/HDFSLoadTest.java
index dd336fd6..5a51e17b 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/HDFSLoadTest.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/HDFSLoadTest.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/HDFSUtil.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/HDFSUtil.java
index eccce2b7..3faeef3f 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/HDFSUtil.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/HDFSUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/IOUtil.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/IOUtil.java
index 02140dad..db94392e 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/IOUtil.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/IOUtil.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/JDBCLoadTest.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/JDBCLoadTest.java
index 351e2067..9a5c54e6 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/JDBCLoadTest.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/JDBCLoadTest.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/LoadTest.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/LoadTest.java
index 8ff6547d..1f597f79 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/LoadTest.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/LoadTest.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/DateUtilTest.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/DateUtilTest.java
index c7c4490a..6370c897 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/DateUtilTest.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/DateUtilTest.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/LineTest.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/LineTest.java
index 8111ce92..d8612ee2 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/LineTest.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/LineTest.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/LoadProgressTest.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/LoadProgressTest.java
index 5b49ab8e..8bc703b1 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/LoadProgressTest.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/LoadProgressTest.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/MappingConverterTest.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/MappingConverterTest.java
index 7e867862..ba661736 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/MappingConverterTest.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/MappingConverterTest.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/RangesTimerTest.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/RangesTimerTest.java
index b3442442..d82cedc5 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/RangesTimerTest.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/RangesTimerTest.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/UnitTestSuite.java b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/UnitTestSuite.java
index 2172c820..b9d453cf 100644
--- a/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/UnitTestSuite.java
+++ b/hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/unit/UnitTestSuite.java
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/bz2_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/bz2_compress_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/bz2_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/bz2_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/clear_schema_before_load/schema.groovy b/hugegraph-loader/src/test/resources/clear_schema_before_load/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/clear_schema_before_load/schema.groovy
+++ b/hugegraph-loader/src/test/resources/clear_schema_before_load/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/customized_delimiter_in_csv_file/schema.groovy b/hugegraph-loader/src/test/resources/customized_delimiter_in_csv_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/customized_delimiter_in_csv_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/customized_delimiter_in_csv_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/customized_long_id/schema.groovy b/hugegraph-loader/src/test/resources/customized_long_id/schema.groovy
index 99fa86c3..f74aa61f 100644
--- a/hugegraph-loader/src/test/resources/customized_long_id/schema.groovy
+++ b/hugegraph-loader/src/test/resources/customized_long_id/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/customized_number_id/schema.groovy b/hugegraph-loader/src/test/resources/customized_number_id/schema.groovy
index 99fa86c3..f74aa61f 100644
--- a/hugegraph-loader/src/test/resources/customized_number_id/schema.groovy
+++ b/hugegraph-loader/src/test/resources/customized_number_id/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/customized_schema/schema.groovy b/hugegraph-loader/src/test/resources/customized_schema/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/customized_schema/schema.groovy
+++ b/hugegraph-loader/src/test/resources/customized_schema/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/customized_timezone_gmt0/schema.groovy b/hugegraph-loader/src/test/resources/customized_timezone_gmt0/schema.groovy
index 60c4427b..1e31693e 100644
--- a/hugegraph-loader/src/test/resources/customized_timezone_gmt0/schema.groovy
+++ b/hugegraph-loader/src/test/resources/customized_timezone_gmt0/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/customized_uuid/schema.groovy b/hugegraph-loader/src/test/resources/customized_uuid/schema.groovy
index 3aad8f7d..33b2024a 100644
--- a/hugegraph-loader/src/test/resources/customized_uuid/schema.groovy
+++ b/hugegraph-loader/src/test/resources/customized_uuid/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/default_timezone_gmt8/schema.groovy b/hugegraph-loader/src/test/resources/default_timezone_gmt8/schema.groovy
index 60c4427b..1e31693e 100644
--- a/hugegraph-loader/src/test/resources/default_timezone_gmt8/schema.groovy
+++ b/hugegraph-loader/src/test/resources/default_timezone_gmt8/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/deflate_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/deflate_compress_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/deflate_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/deflate_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/dir_has_multi_files/schema.groovy b/hugegraph-loader/src/test/resources/dir_has_multi_files/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/dir_has_multi_files/schema.groovy
+++ b/hugegraph-loader/src/test/resources/dir_has_multi_files/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/dir_has_no_file/schema.groovy b/hugegraph-loader/src/test/resources/dir_has_no_file/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/dir_has_no_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/dir_has_no_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/edge_source_or_target_column_empty/schema.groovy b/hugegraph-loader/src/test/resources/edge_source_or_target_column_empty/schema.groovy
index cddb97a3..d784bd3c 100644
--- a/hugegraph-loader/src/test/resources/edge_source_or_target_column_empty/schema.groovy
+++ b/hugegraph-loader/src/test/resources/edge_source_or_target_column_empty/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/edge_unfold_many_to_many/schema.groovy b/hugegraph-loader/src/test/resources/edge_unfold_many_to_many/schema.groovy
index ab8b7c46..e2d9683b 100644
--- a/hugegraph-loader/src/test/resources/edge_unfold_many_to_many/schema.groovy
+++ b/hugegraph-loader/src/test/resources/edge_unfold_many_to_many/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/edge_unfold_many_to_many_with_unmatch_number/schema.groovy b/hugegraph-loader/src/test/resources/edge_unfold_many_to_many_with_unmatch_number/schema.groovy
index ab8b7c46..e2d9683b 100644
--- a/hugegraph-loader/src/test/resources/edge_unfold_many_to_many_with_unmatch_number/schema.groovy
+++ b/hugegraph-loader/src/test/resources/edge_unfold_many_to_many_with_unmatch_number/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/edge_unfold_many_to_one/schema.groovy b/hugegraph-loader/src/test/resources/edge_unfold_many_to_one/schema.groovy
index ab8b7c46..e2d9683b 100644
--- a/hugegraph-loader/src/test/resources/edge_unfold_many_to_one/schema.groovy
+++ b/hugegraph-loader/src/test/resources/edge_unfold_many_to_one/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/edge_unfold_one_to_many/schema.groovy b/hugegraph-loader/src/test/resources/edge_unfold_one_to_many/schema.groovy
index ab8b7c46..e2d9683b 100644
--- a/hugegraph-loader/src/test/resources/edge_unfold_one_to_many/schema.groovy
+++ b/hugegraph-loader/src/test/resources/edge_unfold_one_to_many/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/empty_file_with_header/schema.groovy b/hugegraph-loader/src/test/resources/empty_file_with_header/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/empty_file_with_header/schema.groovy
+++ b/hugegraph-loader/src/test/resources/empty_file_with_header/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/empty_file_without_header/schema.groovy b/hugegraph-loader/src/test/resources/empty_file_without_header/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/empty_file_without_header/schema.groovy
+++ b/hugegraph-loader/src/test/resources/empty_file_without_header/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/file_has_empty_line/schema.groovy b/hugegraph-loader/src/test/resources/file_has_empty_line/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/file_has_empty_line/schema.groovy
+++ b/hugegraph-loader/src/test/resources/file_has_empty_line/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/file_has_skipped_line_regex/schema.groovy b/hugegraph-loader/src/test/resources/file_has_skipped_line_regex/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/file_has_skipped_line_regex/schema.groovy
+++ b/hugegraph-loader/src/test/resources/file_has_skipped_line_regex/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/file_no_header/schema.groovy b/hugegraph-loader/src/test/resources/file_no_header/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/file_no_header/schema.groovy
+++ b/hugegraph-loader/src/test/resources/file_no_header/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/fill_missing_column_with_empty/schema.groovy b/hugegraph-loader/src/test/resources/fill_missing_column_with_empty/schema.groovy
index bfa335da..25fc2956 100644
--- a/hugegraph-loader/src/test/resources/fill_missing_column_with_empty/schema.groovy
+++ b/hugegraph-loader/src/test/resources/fill_missing_column_with_empty/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/filter_file_by_suffix/schema.groovy b/hugegraph-loader/src/test/resources/filter_file_by_suffix/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/filter_file_by_suffix/schema.groovy
+++ b/hugegraph-loader/src/test/resources/filter_file_by_suffix/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/filter_path_by_suffix/schema.groovy b/hugegraph-loader/src/test/resources/filter_path_by_suffix/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/filter_path_by_suffix/schema.groovy
+++ b/hugegraph-loader/src/test/resources/filter_path_by_suffix/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/gzip_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/gzip_compress_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/gzip_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/gzip_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/hdfs_with_core_site_path/core-site.xml b/hugegraph-loader/src/test/resources/hdfs_with_core_site_path/core-site.xml
index e39c17d2..7d02c144 100644
--- a/hugegraph-loader/src/test/resources/hdfs_with_core_site_path/core-site.xml
+++ b/hugegraph-loader/src/test/resources/hdfs_with_core_site_path/core-site.xml
@@ -1,16 +1,18 @@
 <!--
   Licensed to the Apache Software Foundation (ASF) under one or more
-  contributor license agreements.  See the NOTICE file distributed with
-  this work for additional information regarding copyright ownership.
-  The ASF licenses this file to You under the Apache License, Version 2.0
-  (the "License"); you may not use this file except in compliance with
-  the License.  You may obtain a copy of the License at
+  contributor license agreements. See the NOTICE file distributed with this
+  work for additional information regarding copyright ownership. The ASF
+  licenses this file to You under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
       http://www.apache.org/licenses/LICENSE-2.0
+
   Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
+  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+  License for the specific language governing permissions and limitations
+  under the License.
   -->
 <configuration>
     <property>
diff --git a/hugegraph-loader/src/test/resources/hdfs_with_core_site_path/schema.groovy b/hugegraph-loader/src/test/resources/hdfs_with_core_site_path/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/hdfs_with_core_site_path/schema.groovy
+++ b/hugegraph-loader/src/test/resources/hdfs_with_core_site_path/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/hdfs_with_empty_core_site_path/schema.groovy b/hugegraph-loader/src/test/resources/hdfs_with_empty_core_site_path/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/hdfs_with_empty_core_site_path/schema.groovy
+++ b/hugegraph-loader/src/test/resources/hdfs_with_empty_core_site_path/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/hdfs_with_invalid_core_site_path/core-site.xml b/hugegraph-loader/src/test/resources/hdfs_with_invalid_core_site_path/core-site.xml
index 3aba46b1..8e145441 100644
--- a/hugegraph-loader/src/test/resources/hdfs_with_invalid_core_site_path/core-site.xml
+++ b/hugegraph-loader/src/test/resources/hdfs_with_invalid_core_site_path/core-site.xml
@@ -1,16 +1,18 @@
 <!--
   Licensed to the Apache Software Foundation (ASF) under one or more
-  contributor license agreements.  See the NOTICE file distributed with
-  this work for additional information regarding copyright ownership.
-  The ASF licenses this file to You under the Apache License, Version 2.0
-  (the "License"); you may not use this file except in compliance with
-  the License.  You may obtain a copy of the License at
+  contributor license agreements. See the NOTICE file distributed with this
+  work for additional information regarding copyright ownership. The ASF
+  licenses this file to You under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
       http://www.apache.org/licenses/LICENSE-2.0
+
   Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
+  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+  License for the specific language governing permissions and limitations
+  under the License.
   -->
 <configuration>
     <property>
diff --git a/hugegraph-loader/src/test/resources/hdfs_with_invalid_core_site_path/schema.groovy b/hugegraph-loader/src/test/resources/hdfs_with_invalid_core_site_path/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/hdfs_with_invalid_core_site_path/schema.groovy
+++ b/hugegraph-loader/src/test/resources/hdfs_with_invalid_core_site_path/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/hdfs_with_unexist_core_site_path/core-site.xml b/hugegraph-loader/src/test/resources/hdfs_with_unexist_core_site_path/core-site.xml
index e39c17d2..7d02c144 100644
--- a/hugegraph-loader/src/test/resources/hdfs_with_unexist_core_site_path/core-site.xml
+++ b/hugegraph-loader/src/test/resources/hdfs_with_unexist_core_site_path/core-site.xml
@@ -1,16 +1,18 @@
 <!--
   Licensed to the Apache Software Foundation (ASF) under one or more
-  contributor license agreements.  See the NOTICE file distributed with
-  this work for additional information regarding copyright ownership.
-  The ASF licenses this file to You under the Apache License, Version 2.0
-  (the "License"); you may not use this file except in compliance with
-  the License.  You may obtain a copy of the License at
+  contributor license agreements. See the NOTICE file distributed with this
+  work for additional information regarding copyright ownership. The ASF
+  licenses this file to You under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
       http://www.apache.org/licenses/LICENSE-2.0
+
   Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
+  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+  License for the specific language governing permissions and limitations
+  under the License.
   -->
 <configuration>
     <property>
diff --git a/hugegraph-loader/src/test/resources/hdfs_with_unexist_core_site_path/schema.groovy b/hugegraph-loader/src/test/resources/hdfs_with_unexist_core_site_path/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/hdfs_with_unexist_core_site_path/schema.groovy
+++ b/hugegraph-loader/src/test/resources/hdfs_with_unexist_core_site_path/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/header_is_empty/schema.groovy b/hugegraph-loader/src/test/resources/header_is_empty/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/header_is_empty/schema.groovy
+++ b/hugegraph-loader/src/test/resources/header_is_empty/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/id_field_as_property/schema.groovy b/hugegraph-loader/src/test/resources/id_field_as_property/schema.groovy
index 36d315a6..5b924bc2 100644
--- a/hugegraph-loader/src/test/resources/id_field_as_property/schema.groovy
+++ b/hugegraph-loader/src/test/resources/id_field_as_property/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/ignore_null_value_columns/schema.groovy b/hugegraph-loader/src/test/resources/ignore_null_value_columns/schema.groovy
index 9c7158f5..86f58362 100644
--- a/hugegraph-loader/src/test/resources/ignore_null_value_columns/schema.groovy
+++ b/hugegraph-loader/src/test/resources/ignore_null_value_columns/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/ignore_tail_redudant_empty_column/schema.groovy b/hugegraph-loader/src/test/resources/ignore_tail_redudant_empty_column/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/ignore_tail_redudant_empty_column/schema.groovy
+++ b/hugegraph-loader/src/test/resources/ignore_tail_redudant_empty_column/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/ignored_fields/schema.groovy b/hugegraph-loader/src/test/resources/ignored_fields/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/ignored_fields/schema.groovy
+++ b/hugegraph-loader/src/test/resources/ignored_fields/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/incremental_mode_and_load_failure/schema.groovy b/hugegraph-loader/src/test/resources/incremental_mode_and_load_failure/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/incremental_mode_and_load_failure/schema.groovy
+++ b/hugegraph-loader/src/test/resources/incremental_mode_and_load_failure/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/jdbc_customized_schema/schema.groovy b/hugegraph-loader/src/test/resources/jdbc_customized_schema/schema.groovy
index ab2c0df4..ed703574 100644
--- a/hugegraph-loader/src/test/resources/jdbc_customized_schema/schema.groovy
+++ b/hugegraph-loader/src/test/resources/jdbc_customized_schema/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/jdbc_value_mapping/schema.groovy b/hugegraph-loader/src/test/resources/jdbc_value_mapping/schema.groovy
index dcf012d0..305adf46 100644
--- a/hugegraph-loader/src/test/resources/jdbc_value_mapping/schema.groovy
+++ b/hugegraph-loader/src/test/resources/jdbc_value_mapping/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/long_property/schema.groovy b/hugegraph-loader/src/test/resources/long_property/schema.groovy
index cff05277..33a06927 100644
--- a/hugegraph-loader/src/test/resources/long_property/schema.groovy
+++ b/hugegraph-loader/src/test/resources/long_property/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/lz4_block_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/lz4_block_compress_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/lz4_block_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/lz4_block_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/lz4_framed_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/lz4_framed_compress_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/lz4_framed_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/lz4_framed_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/lzma_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/lzma_compress_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/lzma_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/lzma_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/mapping_ignore_null_value_columns/schema.groovy b/hugegraph-loader/src/test/resources/mapping_ignore_null_value_columns/schema.groovy
index 9c7158f5..86f58362 100644
--- a/hugegraph-loader/src/test/resources/mapping_ignore_null_value_columns/schema.groovy
+++ b/hugegraph-loader/src/test/resources/mapping_ignore_null_value_columns/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/mapping_v2/schema.groovy b/hugegraph-loader/src/test/resources/mapping_v2/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/mapping_v2/schema.groovy
+++ b/hugegraph-loader/src/test/resources/mapping_v2/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/matched_date_property_format/schema.groovy b/hugegraph-loader/src/test/resources/matched_date_property_format/schema.groovy
index d21be979..4eb5e57b 100644
--- a/hugegraph-loader/src/test/resources/matched_date_property_format/schema.groovy
+++ b/hugegraph-loader/src/test/resources/matched_date_property_format/schema.groovy
@@ -15,40 +15,10 @@
  * under the License.
  */
 
-/*
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with this
- * work for additional information regarding copyright ownership. The ASF
- * licenses this file to You under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- */
-/*
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with this
- * work for additional information regarding copyright ownership. The ASF
- * licenses this file to You under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- */
+
+
+
+
 schema.propertyKey("name").asText().ifNotExist().create();
 schema.propertyKey("birth").asDate().ifNotExist().create();
 schema.propertyKey("city").asText().ifNotExist().create();
diff --git a/hugegraph-loader/src/test/resources/matched_encoding_charset/schema.groovy b/hugegraph-loader/src/test/resources/matched_encoding_charset/schema.groovy
index 8e4e60f9..8aca65fb 100644
--- a/hugegraph-loader/src/test/resources/matched_encoding_charset/schema.groovy
+++ b/hugegraph-loader/src/test/resources/matched_encoding_charset/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/multi_column_mapping_to_same_label/schema.groovy b/hugegraph-loader/src/test/resources/multi_column_mapping_to_same_label/schema.groovy
index b763b3db..2acecbd2 100644
--- a/hugegraph-loader/src/test/resources/multi_column_mapping_to_same_label/schema.groovy
+++ b/hugegraph-loader/src/test/resources/multi_column_mapping_to_same_label/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/multi_files_have_header/schema.groovy b/hugegraph-loader/src/test/resources/multi_files_have_header/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/multi_files_have_header/schema.groovy
+++ b/hugegraph-loader/src/test/resources/multi_files_have_header/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/number_and_date_pks_encoded/schema.groovy b/hugegraph-loader/src/test/resources/number_and_date_pks_encoded/schema.groovy
index 6a210f4e..f53bdcf3 100644
--- a/hugegraph-loader/src/test/resources/number_and_date_pks_encoded/schema.groovy
+++ b/hugegraph-loader/src/test/resources/number_and_date_pks_encoded/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/orc_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/orc_compress_file/schema.groovy
index fb024758..f3a469a7 100644
--- a/hugegraph-loader/src/test/resources/orc_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/orc_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/parquet_compress_file/core-site.xml b/hugegraph-loader/src/test/resources/parquet_compress_file/core-site.xml
index e39c17d2..7d02c144 100644
--- a/hugegraph-loader/src/test/resources/parquet_compress_file/core-site.xml
+++ b/hugegraph-loader/src/test/resources/parquet_compress_file/core-site.xml
@@ -1,16 +1,18 @@
 <!--
   Licensed to the Apache Software Foundation (ASF) under one or more
-  contributor license agreements.  See the NOTICE file distributed with
-  this work for additional information regarding copyright ownership.
-  The ASF licenses this file to You under the Apache License, Version 2.0
-  (the "License"); you may not use this file except in compliance with
-  the License.  You may obtain a copy of the License at
+  contributor license agreements. See the NOTICE file distributed with this
+  work for additional information regarding copyright ownership. The ASF
+  licenses this file to You under the Apache License, Version 2.0 (the
+  "License"); you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
       http://www.apache.org/licenses/LICENSE-2.0
+
   Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
+  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+  License for the specific language governing permissions and limitations
+  under the License.
   -->
 <configuration>
     <property>
diff --git a/hugegraph-loader/src/test/resources/parquet_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/parquet_compress_file/schema.groovy
index 5d67f37f..4ed34e29 100644
--- a/hugegraph-loader/src/test/resources/parquet_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/parquet_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/parse_empty_csv_line/schema.groovy b/hugegraph-loader/src/test/resources/parse_empty_csv_line/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/parse_empty_csv_line/schema.groovy
+++ b/hugegraph-loader/src/test/resources/parse_empty_csv_line/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/pk_value_mapping/schema.groovy b/hugegraph-loader/src/test/resources/pk_value_mapping/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/pk_value_mapping/schema.groovy
+++ b/hugegraph-loader/src/test/resources/pk_value_mapping/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/read_reached_max_lines/schema.groovy b/hugegraph-loader/src/test/resources/read_reached_max_lines/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/read_reached_max_lines/schema.groovy
+++ b/hugegraph-loader/src/test/resources/read_reached_max_lines/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/reload_json_failure_files/schema.groovy b/hugegraph-loader/src/test/resources/reload_json_failure_files/schema.groovy
index 6a71dafc..d45391ef 100644
--- a/hugegraph-loader/src/test/resources/reload_json_failure_files/schema.groovy
+++ b/hugegraph-loader/src/test/resources/reload_json_failure_files/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/selected_and_ignored_fields/schema.groovy b/hugegraph-loader/src/test/resources/selected_and_ignored_fields/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/selected_and_ignored_fields/schema.groovy
+++ b/hugegraph-loader/src/test/resources/selected_and_ignored_fields/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/selected_fields/schema.groovy b/hugegraph-loader/src/test/resources/selected_fields/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/selected_fields/schema.groovy
+++ b/hugegraph-loader/src/test/resources/selected_fields/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/single_insert_edge_with_check_vertex_false/schema.groovy b/hugegraph-loader/src/test/resources/single_insert_edge_with_check_vertex_false/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/single_insert_edge_with_check_vertex_false/schema.groovy
+++ b/hugegraph-loader/src/test/resources/single_insert_edge_with_check_vertex_false/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/skip_struct/schema.groovy b/hugegraph-loader/src/test/resources/skip_struct/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/skip_struct/schema.groovy
+++ b/hugegraph-loader/src/test/resources/skip_struct/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/snappy_framed_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/snappy_framed_compress_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/snappy_framed_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/snappy_framed_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/snappy_raw_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/snappy_raw_compress_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/snappy_raw_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/snappy_raw_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/source_or_target_pk_value_empty/schema.groovy b/hugegraph-loader/src/test/resources/source_or_target_pk_value_empty/schema.groovy
index d60cb585..124bd568 100644
--- a/hugegraph-loader/src/test/resources/source_or_target_pk_value_empty/schema.groovy
+++ b/hugegraph-loader/src/test/resources/source_or_target_pk_value_empty/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/source_or_target_pk_value_null/schema.groovy b/hugegraph-loader/src/test/resources/source_or_target_pk_value_null/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/source_or_target_pk_value_null/schema.groovy
+++ b/hugegraph-loader/src/test/resources/source_or_target_pk_value_null/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/source_target_value_mapping/schema.groovy b/hugegraph-loader/src/test/resources/source_target_value_mapping/schema.groovy
index a7cca325..7063e7ab 100644
--- a/hugegraph-loader/src/test/resources/source_target_value_mapping/schema.groovy
+++ b/hugegraph-loader/src/test/resources/source_target_value_mapping/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/timestamp_as_dateformat/schema.groovy b/hugegraph-loader/src/test/resources/timestamp_as_dateformat/schema.groovy
index 60c4427b..1e31693e 100644
--- a/hugegraph-loader/src/test/resources/timestamp_as_dateformat/schema.groovy
+++ b/hugegraph-loader/src/test/resources/timestamp_as_dateformat/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/too_few_columns/schema.groovy b/hugegraph-loader/src/test/resources/too_few_columns/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/too_few_columns/schema.groovy
+++ b/hugegraph-loader/src/test/resources/too_few_columns/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/too_many_columns/schema.groovy b/hugegraph-loader/src/test/resources/too_many_columns/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/too_many_columns/schema.groovy
+++ b/hugegraph-loader/src/test/resources/too_many_columns/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/unmatched_date_property_format/schema.groovy b/hugegraph-loader/src/test/resources/unmatched_date_property_format/schema.groovy
index 60c4427b..1e31693e 100644
--- a/hugegraph-loader/src/test/resources/unmatched_date_property_format/schema.groovy
+++ b/hugegraph-loader/src/test/resources/unmatched_date_property_format/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/unmatched_encoding_charset/schema.groovy b/hugegraph-loader/src/test/resources/unmatched_encoding_charset/schema.groovy
index c272472a..9c7789b9 100644
--- a/hugegraph-loader/src/test/resources/unmatched_encoding_charset/schema.groovy
+++ b/hugegraph-loader/src/test/resources/unmatched_encoding_charset/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/unmatched_property_datatype/schema.groovy b/hugegraph-loader/src/test/resources/unmatched_property_datatype/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/unmatched_property_datatype/schema.groovy
+++ b/hugegraph-loader/src/test/resources/unmatched_property_datatype/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/update_by_strategy/schema.groovy b/hugegraph-loader/src/test/resources/update_by_strategy/schema.groovy
index 09f2f168..6e581907 100644
--- a/hugegraph-loader/src/test/resources/update_by_strategy/schema.groovy
+++ b/hugegraph-loader/src/test/resources/update_by_strategy/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/update_by_strategy_without_symbol/schema.groovy b/hugegraph-loader/src/test/resources/update_by_strategy_without_symbol/schema.groovy
index 09f2f168..6e581907 100644
--- a/hugegraph-loader/src/test/resources/update_by_strategy_without_symbol/schema.groovy
+++ b/hugegraph-loader/src/test/resources/update_by_strategy_without_symbol/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_boolean_property_in_file/schema.groovy b/hugegraph-loader/src/test/resources/value_boolean_property_in_file/schema.groovy
index 3eff67f6..e481ed04 100644
--- a/hugegraph-loader/src/test/resources/value_boolean_property_in_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_boolean_property_in_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_list_property_in_csv_file_with_same_delimiter/schema.groovy b/hugegraph-loader/src/test/resources/value_list_property_in_csv_file_with_same_delimiter/schema.groovy
index 5cfbb0a7..f01a3f34 100644
--- a/hugegraph-loader/src/test/resources/value_list_property_in_csv_file_with_same_delimiter/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_list_property_in_csv_file_with_same_delimiter/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_list_property_in_json_file/schema.groovy b/hugegraph-loader/src/test/resources/value_list_property_in_json_file/schema.groovy
index 4c5c9155..abf725b1 100644
--- a/hugegraph-loader/src/test/resources/value_list_property_in_json_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_list_property_in_json_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_list_property_in_text_file/schema.groovy b/hugegraph-loader/src/test/resources/value_list_property_in_text_file/schema.groovy
index 90f3628e..d31203b3 100644
--- a/hugegraph-loader/src/test/resources/value_list_property_in_text_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_list_property_in_text_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_list_property_in_text_file_with_elem_delimiter/schema.groovy b/hugegraph-loader/src/test/resources/value_list_property_in_text_file_with_elem_delimiter/schema.groovy
index 5cfbb0a7..f01a3f34 100644
--- a/hugegraph-loader/src/test/resources/value_list_property_in_text_file_with_elem_delimiter/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_list_property_in_text_file_with_elem_delimiter/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_list_property_in_text_file_with_symbols/schema.groovy b/hugegraph-loader/src/test/resources/value_list_property_in_text_file_with_symbols/schema.groovy
index 8612ce50..a9066609 100644
--- a/hugegraph-loader/src/test/resources/value_list_property_in_text_file_with_symbols/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_list_property_in_text_file_with_symbols/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_mapping/schema.groovy b/hugegraph-loader/src/test/resources/value_mapping/schema.groovy
index 1f213304..e9340523 100644
--- a/hugegraph-loader/src/test/resources/value_mapping/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_mapping/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_mapping_in_json_file/schema.groovy b/hugegraph-loader/src/test/resources/value_mapping_in_json_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/value_mapping_in_json_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_mapping_in_json_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_set_property_in_json_file/schema.groovy b/hugegraph-loader/src/test/resources/value_set_property_in_json_file/schema.groovy
index 4c5c9155..abf725b1 100644
--- a/hugegraph-loader/src/test/resources/value_set_property_in_json_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_set_property_in_json_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_set_property_in_text_file/schema.groovy b/hugegraph-loader/src/test/resources/value_set_property_in_text_file/schema.groovy
index 29a70456..b910ea4a 100644
--- a/hugegraph-loader/src/test/resources/value_set_property_in_text_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_set_property_in_text_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/value_uuid_property_in_file/schema.groovy b/hugegraph-loader/src/test/resources/value_uuid_property_in_file/schema.groovy
index 9d856b7a..622d905a 100644
--- a/hugegraph-loader/src/test/resources/value_uuid_property_in_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/value_uuid_property_in_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_customized_id_unfold/schema.groovy b/hugegraph-loader/src/test/resources/vertex_customized_id_unfold/schema.groovy
index 3ec4c803..10b6e3d3 100644
--- a/hugegraph-loader/src/test/resources/vertex_customized_id_unfold/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_customized_id_unfold/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_customized_id_unfold_with_mapping/schema.groovy b/hugegraph-loader/src/test/resources/vertex_customized_id_unfold_with_mapping/schema.groovy
index 3ec4c803..10b6e3d3 100644
--- a/hugegraph-loader/src/test/resources/vertex_customized_id_unfold_with_mapping/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_customized_id_unfold_with_mapping/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_id_column_empty/schema.groovy b/hugegraph-loader/src/test/resources/vertex_id_column_empty/schema.groovy
index 3ec4c803..10b6e3d3 100644
--- a/hugegraph-loader/src/test/resources/vertex_id_column_empty/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_id_column_empty/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_id_exceed_limit/schema.groovy b/hugegraph-loader/src/test/resources/vertex_id_exceed_limit/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/vertex_id_exceed_limit/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_id_exceed_limit/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_id_exceed_limit_in_bytes/schema.groovy b/hugegraph-loader/src/test/resources/vertex_id_exceed_limit_in_bytes/schema.groovy
index c272472a..9c7789b9 100644
--- a/hugegraph-loader/src/test/resources/vertex_id_exceed_limit_in_bytes/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_id_exceed_limit_in_bytes/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_joint_pks/schema.groovy b/hugegraph-loader/src/test/resources/vertex_joint_pks/schema.groovy
index ba144f00..4a3c6611 100644
--- a/hugegraph-loader/src/test/resources/vertex_joint_pks/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_joint_pks/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_pk_contains_special_symbol/schema.groovy b/hugegraph-loader/src/test/resources/vertex_pk_contains_special_symbol/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/vertex_pk_contains_special_symbol/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_pk_contains_special_symbol/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_pk_value_empty/schema.groovy b/hugegraph-loader/src/test/resources/vertex_pk_value_empty/schema.groovy
index 8c9db71d..6d1f3a3a 100644
--- a/hugegraph-loader/src/test/resources/vertex_pk_value_empty/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_pk_value_empty/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_pk_value_null/schema.groovy b/hugegraph-loader/src/test/resources/vertex_pk_value_null/schema.groovy
index 4966a072..8571b435 100644
--- a/hugegraph-loader/src/test/resources/vertex_pk_value_null/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_pk_value_null/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_primarykey_unfold/schema.groovy b/hugegraph-loader/src/test/resources/vertex_primarykey_unfold/schema.groovy
index d54988a1..d3352c8f 100644
--- a/hugegraph-loader/src/test/resources/vertex_primarykey_unfold/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_primarykey_unfold/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_primarykey_unfold_exceed_limit/schema.groovy b/hugegraph-loader/src/test/resources/vertex_primarykey_unfold_exceed_limit/schema.groovy
index 4c3c8b11..ddb84bc5 100644
--- a/hugegraph-loader/src/test/resources/vertex_primarykey_unfold_exceed_limit/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_primarykey_unfold_exceed_limit/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_primarykey_unfold_with_mapping/schema.groovy b/hugegraph-loader/src/test/resources/vertex_primarykey_unfold_with_mapping/schema.groovy
index d54988a1..d3352c8f 100644
--- a/hugegraph-loader/src/test/resources/vertex_primarykey_unfold_with_mapping/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_primarykey_unfold_with_mapping/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/vertex_unfold_in_json_file/schema.groovy b/hugegraph-loader/src/test/resources/vertex_unfold_in_json_file/schema.groovy
index 388deeca..09bb9ea3 100644
--- a/hugegraph-loader/src/test/resources/vertex_unfold_in_json_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/vertex_unfold_in_json_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/xz_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/xz_compress_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/xz_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/xz_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF
diff --git a/hugegraph-loader/src/test/resources/z_compress_file/schema.groovy b/hugegraph-loader/src/test/resources/z_compress_file/schema.groovy
index 9ea09c10..94c747ff 100644
--- a/hugegraph-loader/src/test/resources/z_compress_file/schema.groovy
+++ b/hugegraph-loader/src/test/resources/z_compress_file/schema.groovy
@@ -1,5 +1,4 @@
 /*
- *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements. See the NOTICE file distributed with this
  * work for additional information regarding copyright ownership. The ASF