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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5166) ConcurrentModificationException in LocalJobRunner
Date Thu, 18 Apr 2013 18:38:22 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13635502#comment-13635502
] 

Sandy Ryza commented on MAPREDUCE-5166:
---------------------------------------

Gunther, which version of Hadoop does this appear in?
                
> ConcurrentModificationException in LocalJobRunner
> -------------------------------------------------
>
>                 Key: MAPREDUCE-5166
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5166
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Gunther Hagleitner
>            Priority: Critical
>
> With the latest version hive unit tests fail in various places with the following stack
trace. The problem seems related to: MAPREDUCE-2931
> {noformat}
>     [junit] java.util.ConcurrentModificationException
>     [junit] 	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
>     [junit] 	at java.util.HashMap$ValueIterator.next(HashMap.java:822)
>     [junit] 	at org.apache.hadoop.mapred.Counters.incrAllCounters(Counters.java:505)
>     [junit] 	at org.apache.hadoop.mapred.Counters.sum(Counters.java:528)
>     [junit] 	at org.apache.hadoop.mapred.LocalJobRunner$Job.getCurrentCounters(LocalJobRunner.java:490)
>     [junit] 	at org.apache.hadoop.mapred.LocalJobRunner.getJobCounters(LocalJobRunner.java:634)
>     [junit] 	at org.apache.hadoop.mapred.JobClient$NetworkedJob.getCounters(JobClient.java:418)
>     [junit] 	at org.apache.hadoop.hive.ql.exec.HadoopJobExecHelper$ExecDriverTaskHandle.getCounters(HadoopJobExecHelper.java:465)
>     [junit] 	at org.apache.hadoop.hive.ql.exec.HadoopJobExecHelper.progress(HadoopJobExecHelper.java:300)
>     [junit] 	at org.apache.hadoop.hive.ql.exec.HadoopJobExecHelper.progress(HadoopJobExecHelper.java:532)
>     [junit] 	at org.apache.hadoop.hive.ql.exec.ExecDriver.execute(ExecDriver.java:453)
>     [junit] 	at org.apache.hadoop.hive.ql.exec.ExecDriver.main(ExecDriver.java:681)
>     [junit] 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>     [junit] 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>     [junit] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>     [junit] 	at java.lang.reflect.Method.invoke(Method.java:597)
>     [junit] 	at org.apache.hadoop.util.RunJar.main(RunJar.java:160)
> {noformat}

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