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https://issues.apache.org/jira/browse/HIVE-2540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13141373#comment-13141373
]
David Phillips commented on HIVE-2540:
--------------------------------------
This is the exception:
{code}
2011-11-01 10:20:06,139 FATAL ExecMapper (ExecMapper.java:map(160)) -
org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while
processing row {"a":[1,2]}
at
org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:546)
at org.apache.hadoop.hive.ql.exec.ExecMapper.map(ExecMapper.java:143)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)
Caused by: java.util.ConcurrentModificationException
at
java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at
org.apache.hadoop.hive.ql.udf.generic.GenericUDTFExplode.process(GenericUDTFExplode.java:73)
at
org.apache.hadoop.hive.ql.exec.UDTFOperator.processOp(UDTFOperator.java:98)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:471)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:744)
at
org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:84)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:471)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:744)
at
org.apache.hadoop.hive.ql.exec.LateralViewForwardOperator.processOp(LateralViewForwardOperator.java:37)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:471)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:744)
at
org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:78)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:471)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:744)
at
org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:527)
... 5 more
{code}
> LATERAL VIEW with EXPLODE produces ConcurrentModificationException
> ------------------------------------------------------------------
>
> Key: HIVE-2540
> URL: https://issues.apache.org/jira/browse/HIVE-2540
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.7.1
> Reporter: David Phillips
>
> The following produces {{ConcurrentModificationException}} on the {{for}}
> loop inside EXPLODE:
> {code}
> create table foo as select array(1, 2) a from src limit 1;
> select a, x.b from foo lateral view explode(a) x as b;
> {code}
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