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From "zhihai xu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-14564) Column Pruning generates out of order columns in SelectOperator which cause ArrayIndexOutOfBoundsException.
Date Mon, 29 Aug 2016 06:54:20 GMT

    [ https://issues.apache.org/jira/browse/HIVE-14564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15445006#comment-15445006
] 

zhihai xu commented on HIVE-14564:
----------------------------------

Thanks for the review, [~ashutoshc]! a lot of test cases are updated to adapt to this patch,
Looks like all these cases can verify this patch.

> Column Pruning generates out of order columns in SelectOperator which cause ArrayIndexOutOfBoundsException.
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-14564
>                 URL: https://issues.apache.org/jira/browse/HIVE-14564
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Planning
>    Affects Versions: 2.1.0
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>            Priority: Critical
>         Attachments: HIVE-14564.000.patch, HIVE-14564.001.patch
>
>
> Column Pruning generates out of order columns in SelectOperator which cause ArrayIndexOutOfBoundsException.
> {code}
> 2016-07-26 21:49:24,390 FATAL [main] org.apache.hadoop.hive.ql.exec.mr.ExecMapper: org.apache.hadoop.hive.ql.metadata.HiveException:
Hive Runtime Error while processing row
> 	at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:507)
> 	at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:170)
> 	at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54)
> 	at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:453)
> 	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
> 	at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at javax.security.auth.Subject.doAs(Subject.java:415)
> 	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671)
> 	at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
> Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ArrayIndexOutOfBoundsException
> 	at org.apache.hadoop.hive.ql.exec.ReduceSinkOperator.processOp(ReduceSinkOperator.java:397)
> 	at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:815)
> 	at org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:95)
> 	at org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.forward(MapOperator.java:157)
> 	at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:497)
> 	... 9 more
> Caused by: java.lang.ArrayIndexOutOfBoundsException
> 	at java.lang.System.arraycopy(Native Method)
> 	at org.apache.hadoop.io.Text.set(Text.java:225)
> 	at org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryString.init(LazyBinaryString.java:48)
> 	at org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryStruct.uncheckedGetField(LazyBinaryStruct.java:264)
> 	at org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryStruct.getField(LazyBinaryStruct.java:201)
> 	at org.apache.hadoop.hive.serde2.lazybinary.objectinspector.LazyBinaryStructObjectInspector.getStructFieldData(LazyBinaryStructObjectInspector.java:64)
> 	at org.apache.hadoop.hive.ql.exec.ExprNodeColumnEvaluator._evaluate(ExprNodeColumnEvaluator.java:94)
> 	at org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator.evaluate(ExprNodeEvaluator.java:77)
> 	at org.apache.hadoop.hive.ql.exec.ExprNodeEvaluator.evaluate(ExprNodeEvaluator.java:65)
> 	at org.apache.hadoop.hive.ql.exec.ReduceSinkOperator.makeValueWritable(ReduceSinkOperator.java:550)
> 	at org.apache.hadoop.hive.ql.exec.ReduceSinkOperator.processOp(ReduceSinkOperator.java:377)
> 	... 13 more
> {code}
> The exception is because the serialization and deserialization doesn't match.
> The serialization by LazyBinarySerDe from previous MapReduce job used different order
of columns. When the current MapReduce job deserialized the intermediate sequence file generated
by previous MapReduce job, it will get corrupted data from the deserialization using wrong
order of columns by LazyBinaryStruct. The unmatched columns between  serialization and deserialization
is caused by SelectOperator's Column Pruning {{ColumnPrunerSelectProc}}.



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