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Posted to user-zh@flink.apache.org by Asahi Lee <97...@qq.com> on 2020/07/22 16:07:39 UTC
flink 1.11 ddl sql 添加PROCTIME()列，读取csv错误
1. 程序
StreamExecutionEnvironment bsEnv = StreamExecutionEnvironment.getExecutionEnvironment();
EnvironmentSettings bsSettings = EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
StreamTableEnvironment bsTableEnv = StreamTableEnvironment.create(bsEnv, bsSettings);
String sourceTableDDL = "CREATE TABLE fs_table (" +
" user_id STRING," +
" order_amount DOUBLE," +
" dt TIMESTAMP(3)," +
" pt AS PROCTIME() " +
" ) WITH (" +
" 'connector'='filesystem'," +
" 'path'='D:\\Program Files\\JetBrains\\workspace\\table-walkthrough\\src\\main\\resources\\csv\\order.csv'," +
" 'format'='csv'" +
" )";
bsTableEnv.executeSql(sourceTableDDL);
bsTableEnv.executeSql("select * from fs_table").print();
2. csv文件
order.csv
zhangsan,12.34,2020-08-03 12:23:50
lisi,234.67,2020-08-03 12:25:50
wangwu,57.6,2020-08-03 12:25:50
zhaoliu,345,2020-08-03 12:28:50
3. 错误
- Source: FileSystemTableSource(user_id, order_amount, dt, pt) -> Calc(select=[user_id, order_amount, dt, PROCTIME_MATERIALIZE(()) AS pt]) -> SinkConversionToRow (4/6) (9ee0383d676a190b0a62d206039db26c) switched from RUNNING to FAILED.
java.io.IOException: Failed to deserialize CSV row.
at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:299)
at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:210)
at org.apache.flink.streaming.api.functions.source.InputFormatSourceFunction.run(InputFormatSourceFunction.java:91)
at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)
at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)
at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:201)
Caused by: java.lang.RuntimeException: Row length mismatch. 4 fields expected but was 3.
at org.apache.flink.formats.csv.CsvRowDataDeserializationSchema.validateArity(CsvRowDataDeserializationSchema.java:441)
at org.apache.flink.formats.csv.CsvRowDataDeserializationSchema.lambda$createRowConverter$1ca9c073$1(CsvRowDataDeserializationSchema.java:244)
at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:293)
... 5 more
Re: flink 1.11 ddl sql 添加PROCTIME()列，读取csv错误
Posted by godfrey he <go...@gmail.com>.
和hive结合下，filesystem是支持流式读取的，可以参考 [1]
https://ci.apache.org/projects/flink/flink-docs-release-1.11/zh/dev/table/hive/hive_streaming.html#streaming-reading
Leonard Xu <xb...@gmail.com> 于2020年7月23日周四 下午10:28写道：
> Hi,
>
> Filesystem connector 支持streaming 写入，streaming 读取
> 还未支持，所以读取完了就停止。支持streaming 写入从文档上看[1]应该是有计划的
>
>
> [1]
> https://ci.apache.org/projects/flink/flink-docs-release-1.11/zh/dev/table/connectors/filesystem.html
> <
> https://ci.apache.org/projects/flink/flink-docs-release-1.11/zh/dev/table/connectors/filesystem.html
> >
>
>
> > 在 2020年7月23日，22:05，Asahi Lee <97...@qq.com> 写道：
> >
> > 使用filesystem读取csv作为源，使用流环境，为什么我的程序一执行就停止，而不是等待文件的追加写入，继续计算呢？
> > 还是filesystem只能用于批操作？
> >
> >
> >
> >
> > ------------------ 原始邮件 ------------------
> > 发件人:
> "user-zh"
> <
> xbjtdcq@gmail.com <ma...@gmail.com>>;
> > 发送时间: 2020年7月23日(星期四) 上午9:55
> > 收件人: "user-zh"<user-zh@flink.apache.org <mailto:
> user-zh@flink.apache.org>>;
> >
> > 主题: Re: flink 1.11 ddl sql 添加PROCTIME()列，读取csv错误
> >
> >
> >
> > Hi, Asahi
> >
> > 这是一个已知bug[1]，filesystem connector上处理计算列有点问题，已经有PR了，会在1.11.2和1.12版本上修复
> >
> >
> > Best
> > Leonard Xu
> > [1] https://issues.apache.org/jira/browse/FLINK-18665 <
> https://issues.apache.org/jira/browse/FLINK-18665> <
> https://issues.apache.org/jira/browse/FLINK-18665> <
> https://issues.apache.org/jira/browse/FLINK-18665>>;
> >
> > > 在 2020年7月23日，00:07，Asahi Lee <978466273@qq.com <mailto:
> 978466273@qq.com>> 写道：
> > >
> > > 1. 程序
> > > StreamExecutionEnvironment bsEnv =
> StreamExecutionEnvironment.getExecutionEnvironment();
> > > &nbsp; &nbsp; &nbsp; &nbsp; EnvironmentSettings
> bsSettings =
> EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
> > > &nbsp; &nbsp; &nbsp; &nbsp; StreamTableEnvironment
> bsTableEnv = StreamTableEnvironment.create(bsEnv, bsSettings);
> > >
> > >
> > > &nbsp; &nbsp; &nbsp; &nbsp; String sourceTableDDL =
> "CREATE TABLE fs_table (" +
> > > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
> &nbsp; &nbsp; "&nbsp; user_id STRING," +
> > > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
> &nbsp; &nbsp; "&nbsp; order_amount DOUBLE," +
> > > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
> &nbsp; &nbsp; "&nbsp; dt TIMESTAMP(3)," +
> > > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
> &nbsp; &nbsp; "&nbsp; pt AS PROCTIME() " +
> > > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
> &nbsp; &nbsp; " ) WITH (" +
> > > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
> &nbsp; &nbsp; "&nbsp; 'connector'='filesystem'," +
> > > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
> &nbsp; &nbsp; "&nbsp; 'path'='D:\\Program
> Files\\JetBrains\\workspace\\table-walkthrough\\src\\main\\resources\\csv\\order.csv',"
> +
> > > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
> &nbsp; &nbsp; "&nbsp; 'format'='csv'" +
> > > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
> &nbsp; &nbsp; " )";
> > >
> > >
> > > &nbsp; &nbsp; &nbsp; &nbsp;
> bsTableEnv.executeSql(sourceTableDDL);
> > > &nbsp; &nbsp; &nbsp; &nbsp;
> bsTableEnv.executeSql("select * from fs_table").print();
> > > 2. csv文件
> > > order.csv
> > > zhangsan,12.34,2020-08-03 12:23:50
> > > lisi,234.67,2020-08-03 12:25:50
> > > wangwu,57.6,2020-08-03 12:25:50
> > > zhaoliu,345,2020-08-03 12:28:50
> > >
> > >
> > >
> > > 3. 错误
> > > &nbsp;- Source: FileSystemTableSource(user_id, order_amount,
> dt, pt) -&gt; Calc(select=[user_id, order_amount, dt,
> PROCTIME_MATERIALIZE(()) AS pt]) -&gt; SinkConversionToRow (4/6)
> (9ee0383d676a190b0a62d206039db26c) switched from RUNNING to FAILED.
> > > java.io.IOException: Failed to deserialize CSV row.
> > > at
> org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:299)
> > > at
> org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:210)
> > > at
> org.apache.flink.streaming.api.functions.source.InputFormatSourceFunction.run(InputFormatSourceFunction.java:91)
> > > at
> org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)
> > > at
> org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)
> > > at
> org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:201)
> > > Caused by: java.lang.RuntimeException: Row length mismatch. 4
> fields expected but was 3.
> > > at
> org.apache.flink.formats.csv.CsvRowDataDeserializationSchema.validateArity(CsvRowDataDeserializationSchema.java:441)
> > > at
> org.apache.flink.formats.csv.CsvRowDataDeserializationSchema.lambda$createRowConverter$1ca9c073$1(CsvRowDataDeserializationSchema.java:244)
> > > at
> org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:293)
> > > ... 5 more
>
>
Re: flink 1.11 ddl sql 添加PROCTIME()列，读取csv错误
Posted by Leonard Xu <xb...@gmail.com>.
Hi,
Filesystem connector 支持streaming 写入，streaming 读取 还未支持，所以读取完了就停止。支持streaming 写入从文档上看[1]应该是有计划的
[1]https://ci.apache.org/projects/flink/flink-docs-release-1.11/zh/dev/table/connectors/filesystem.html <https://ci.apache.org/projects/flink/flink-docs-release-1.11/zh/dev/table/connectors/filesystem.html>
> 在 2020年7月23日，22:05，Asahi Lee <97...@qq.com> 写道：
>
> 使用filesystem读取csv作为源，使用流环境，为什么我的程序一执行就停止，而不是等待文件的追加写入，继续计算呢？
> 还是filesystem只能用于批操作？
>
>
>
>
> ------------------ 原始邮件 ------------------
> 发件人: "user-zh" <xbjtdcq@gmail.com <ma...@gmail.com>>;
> 发送时间: 2020年7月23日(星期四) 上午9:55
> 收件人: "user-zh"<user-zh@flink.apache.org <ma...@flink.apache.org>>;
>
> 主题: Re: flink 1.11 ddl sql 添加PROCTIME()列，读取csv错误
>
>
>
> Hi, Asahi
>
> 这是一个已知bug[1]，filesystem connector上处理计算列有点问题，已经有PR了，会在1.11.2和1.12版本上修复
>
>
> Best
> Leonard Xu
> [1] https://issues.apache.org/jira/browse/FLINK-18665 <https://issues.apache.org/jira/browse/FLINK-18665> <https://issues.apache.org/jira/browse/FLINK-18665> <https://issues.apache.org/jira/browse/FLINK-18665>>;
>
> > 在 2020年7月23日，00:07，Asahi Lee <978466273@qq.com <ma...@qq.com>> 写道：
> >
> > 1. 程序
> > StreamExecutionEnvironment bsEnv = StreamExecutionEnvironment.getExecutionEnvironment();
> > &nbsp; &nbsp; &nbsp; &nbsp; EnvironmentSettings bsSettings = EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
> > &nbsp; &nbsp; &nbsp; &nbsp; StreamTableEnvironment bsTableEnv = StreamTableEnvironment.create(bsEnv, bsSettings);
> >
> >
> > &nbsp; &nbsp; &nbsp; &nbsp; String sourceTableDDL = "CREATE TABLE fs_table (" +
> > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; user_id STRING," +
> > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; order_amount DOUBLE," +
> > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; dt TIMESTAMP(3)," +
> > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; pt AS PROCTIME() " +
> > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; " ) WITH (" +
> > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; 'connector'='filesystem'," +
> > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; 'path'='D:\\Program Files\\JetBrains\\workspace\\table-walkthrough\\src\\main\\resources\\csv\\order.csv'," +
> > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; 'format'='csv'" +
> > &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; " )";
> >
> >
> > &nbsp; &nbsp; &nbsp; &nbsp; bsTableEnv.executeSql(sourceTableDDL);
> > &nbsp; &nbsp; &nbsp; &nbsp; bsTableEnv.executeSql("select * from fs_table").print();
> > 2. csv文件
> > order.csv
> > zhangsan,12.34,2020-08-03 12:23:50
> > lisi,234.67,2020-08-03 12:25:50
> > wangwu,57.6,2020-08-03 12:25:50
> > zhaoliu,345,2020-08-03 12:28:50
> >
> >
> >
> > 3. 错误
> > &nbsp;- Source: FileSystemTableSource(user_id, order_amount, dt, pt) -&gt; Calc(select=[user_id, order_amount, dt, PROCTIME_MATERIALIZE(()) AS pt]) -&gt; SinkConversionToRow (4/6) (9ee0383d676a190b0a62d206039db26c) switched from RUNNING to FAILED.
> > java.io.IOException: Failed to deserialize CSV row.
> > at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:299)
> > at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:210)
> > at org.apache.flink.streaming.api.functions.source.InputFormatSourceFunction.run(InputFormatSourceFunction.java:91)
> > at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)
> > at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)
> > at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:201)
> > Caused by: java.lang.RuntimeException: Row length mismatch. 4 fields expected but was 3.
> > at org.apache.flink.formats.csv.CsvRowDataDeserializationSchema.validateArity(CsvRowDataDeserializationSchema.java:441)
> > at org.apache.flink.formats.csv.CsvRowDataDeserializationSchema.lambda$createRowConverter$1ca9c073$1(CsvRowDataDeserializationSchema.java:244)
> > at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:293)
> > ... 5 more
回复： flink 1.11 ddl sql 添加PROCTIME()列，读取csv错误
Posted by Asahi Lee <97...@qq.com>.
使用filesystem读取csv作为源，使用流环境，为什么我的程序一执行就停止，而不是等待文件的追加写入，继续计算呢？
还是filesystem只能用于批操作？
------------------ 原始邮件 ------------------
发件人: "user-zh" <xbjtdcq@gmail.com>;
发送时间: 2020年7月23日(星期四) 上午9:55
收件人: "user-zh"<user-zh@flink.apache.org>;
主题: Re: flink 1.11 ddl sql 添加PROCTIME()列，读取csv错误
Hi, Asahi
这是一个已知bug[1]，filesystem connector上处理计算列有点问题，已经有PR了，会在1.11.2和1.12版本上修复
Best
Leonard Xu
[1] https://issues.apache.org/jira/browse/FLINK-18665 <https://issues.apache.org/jira/browse/FLINK-18665>
> 在 2020年7月23日，00:07，Asahi Lee <978466273@qq.com> 写道：
>
> 1. 程序
> StreamExecutionEnvironment bsEnv = StreamExecutionEnvironment.getExecutionEnvironment();
> &nbsp; &nbsp; &nbsp; &nbsp; EnvironmentSettings bsSettings = EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
> &nbsp; &nbsp; &nbsp; &nbsp; StreamTableEnvironment bsTableEnv = StreamTableEnvironment.create(bsEnv, bsSettings);
>
>
> &nbsp; &nbsp; &nbsp; &nbsp; String sourceTableDDL = "CREATE TABLE fs_table (" +
> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; user_id STRING," +
> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; order_amount DOUBLE," +
> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; dt TIMESTAMP(3)," +
> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; pt AS PROCTIME() " +
> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; " ) WITH (" +
> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; 'connector'='filesystem'," +
> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; 'path'='D:\\Program Files\\JetBrains\\workspace\\table-walkthrough\\src\\main\\resources\\csv\\order.csv'," +
> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; "&nbsp; 'format'='csv'" +
> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; " )";
>
>
> &nbsp; &nbsp; &nbsp; &nbsp; bsTableEnv.executeSql(sourceTableDDL);
> &nbsp; &nbsp; &nbsp; &nbsp; bsTableEnv.executeSql("select * from fs_table").print();
> 2. csv文件
> order.csv
> zhangsan,12.34,2020-08-03 12:23:50
> lisi,234.67,2020-08-03 12:25:50
> wangwu,57.6,2020-08-03 12:25:50
> zhaoliu,345,2020-08-03 12:28:50
>
>
>
> 3. 错误
> &nbsp;- Source: FileSystemTableSource(user_id, order_amount, dt, pt) -&gt; Calc(select=[user_id, order_amount, dt, PROCTIME_MATERIALIZE(()) AS pt]) -&gt; SinkConversionToRow (4/6) (9ee0383d676a190b0a62d206039db26c) switched from RUNNING to FAILED.
> java.io.IOException: Failed to deserialize CSV row.
> at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:299)
> at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:210)
> at org.apache.flink.streaming.api.functions.source.InputFormatSourceFunction.run(InputFormatSourceFunction.java:91)
> at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)
> at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)
> at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:201)
> Caused by: java.lang.RuntimeException: Row length mismatch. 4 fields expected but was 3.
> at org.apache.flink.formats.csv.CsvRowDataDeserializationSchema.validateArity(CsvRowDataDeserializationSchema.java:441)
> at org.apache.flink.formats.csv.CsvRowDataDeserializationSchema.lambda$createRowConverter$1ca9c073$1(CsvRowDataDeserializationSchema.java:244)
> at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:293)
> ... 5 more
Re: flink 1.11 ddl sql 添加PROCTIME()列，读取csv错误
Posted by Leonard Xu <xb...@gmail.com>.
Hi, Asahi
这是一个已知bug[1]，filesystem connector上处理计算列有点问题，已经有PR了，会在1.11.2和1.12版本上修复
Best
Leonard Xu
[1] https://issues.apache.org/jira/browse/FLINK-18665 <https://issues.apache.org/jira/browse/FLINK-18665>
> 在 2020年7月23日，00:07，Asahi Lee <97...@qq.com> 写道：
>
> 1. 程序
> StreamExecutionEnvironment bsEnv = StreamExecutionEnvironment.getExecutionEnvironment();
> EnvironmentSettings bsSettings = EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
> StreamTableEnvironment bsTableEnv = StreamTableEnvironment.create(bsEnv, bsSettings);
>
>
> String sourceTableDDL = "CREATE TABLE fs_table (" +
> " user_id STRING," +
> " order_amount DOUBLE," +
> " dt TIMESTAMP(3)," +
> " pt AS PROCTIME() " +
> " ) WITH (" +
> " 'connector'='filesystem'," +
> " 'path'='D:\\Program Files\\JetBrains\\workspace\\table-walkthrough\\src\\main\\resources\\csv\\order.csv'," +
> " 'format'='csv'" +
> " )";
>
>
> bsTableEnv.executeSql(sourceTableDDL);
> bsTableEnv.executeSql("select * from fs_table").print();
> 2. csv文件
> order.csv
> zhangsan,12.34,2020-08-03 12:23:50
> lisi,234.67,2020-08-03 12:25:50
> wangwu,57.6,2020-08-03 12:25:50
> zhaoliu,345,2020-08-03 12:28:50
>
>
>
> 3. 错误
> - Source: FileSystemTableSource(user_id, order_amount, dt, pt) -> Calc(select=[user_id, order_amount, dt, PROCTIME_MATERIALIZE(()) AS pt]) -> SinkConversionToRow (4/6) (9ee0383d676a190b0a62d206039db26c) switched from RUNNING to FAILED.
> java.io.IOException: Failed to deserialize CSV row.
> at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:299)
> at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:210)
> at org.apache.flink.streaming.api.functions.source.InputFormatSourceFunction.run(InputFormatSourceFunction.java:91)
> at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)
> at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)
> at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:201)
> Caused by: java.lang.RuntimeException: Row length mismatch. 4 fields expected but was 3.
> at org.apache.flink.formats.csv.CsvRowDataDeserializationSchema.validateArity(CsvRowDataDeserializationSchema.java:441)
> at org.apache.flink.formats.csv.CsvRowDataDeserializationSchema.lambda$createRowConverter$1ca9c073$1(CsvRowDataDeserializationSchema.java:244)
> at org.apache.flink.formats.csv.CsvFileSystemFormatFactory$CsvInputFormat.nextRecord(CsvFileSystemFormatFactory.java:293)
> ... 5 more