[jira] [Commented] (HIVE-22670) ArrayIndexOutOfBoundsException when vectorized reader is used for reading a parquet file

["Abhay (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-22670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17540277#comment-17540277 ] 

Abhay commented on HIVE-22670:
------------------------------

[~ganeshas] Can you create a PR upstream with a test case attached? [~pvary]  Can we use [~Pierre Gramme] 's test file and write a query test and submit with this patch?

> ArrayIndexOutOfBoundsException when vectorized reader is used for reading a parquet file
> ----------------------------------------------------------------------------------------
>
>                 Key: HIVE-22670
>                 URL: https://issues.apache.org/jira/browse/HIVE-22670
>             Project: Hive
>          Issue Type: Bug
>          Components: Parquet, Vectorization
>    Affects Versions: 2.3.6, 3.1.2
>            Reporter: Ganesha Shreedhara
>            Assignee: Ganesha Shreedhara
>            Priority: Major
>         Attachments: HIVE-22670.1.patch, HIVE-22670.2.patch
>
>
> ArrayIndexOutOfBoundsException is getting thrown while decoding dictionaryIds of a row group in parquet file with vectorization enabled. 
> *Exception stack trace:*
> {code:java}
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
>  at org.apache.parquet.column.values.dictionary.PlainValuesDictionary$PlainBinaryDictionary.decodeToBinary(PlainValuesDictionary.java:122)
>  at org.apache.hadoop.hive.ql.io.parquet.vector.ParquetDataColumnReaderFactory$DefaultParquetDataColumnReader.readString(ParquetDataColumnReaderFactory.java:95)
>  at org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedPrimitiveColumnReader.decodeDictionaryIds(VectorizedPrimitiveColumnReader.java:467)
>  at org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedPrimitiveColumnReader.readBatch(VectorizedPrimitiveColumnReader.java:68)
>  at org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedParquetRecordReader.nextBatch(VectorizedParquetRecordReader.java:410)
>  at org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedParquetRecordReader.next(VectorizedParquetRecordReader.java:353)
>  at org.apache.hadoop.hive.ql.io.parquet.vector.VectorizedParquetRecordReader.next(VectorizedParquetRecordReader.java:92)
>  at org.apache.hadoop.hive.ql.io.HiveContextAwareRecordReader.doNext(HiveContextAwareRecordReader.java:365)
>  ... 24 more{code}
>  
> This issue seems to be caused by re-using the same dictionary column vector while reading consecutive row groups. This looks like one of the corner case bug which occurs for a certain distribution of dictionary/plain encoded data while we read/populate the underlying bit packed dictionary data into a column-vector based data structure. 
> Similar issue issue was reported in spark (Ref: https://issues.apache.org/jira/browse/SPARK-16334)



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