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https://issues.apache.org/jira/browse/MAPREDUCE-4025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13232630#comment-13232630
]
Robert Joseph Evans commented on MAPREDUCE-4025:
------------------------------------------------
The patch looks good to me +1, assuming that Jenkins comes back with no issues.
I normally would like to see a unit test for this, but it is just a one line
change that is very simple to understand so I am OK with it.
> AM can crash if task attempt reports bogus progress value
> ---------------------------------------------------------
>
> Key: MAPREDUCE-4025
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4025
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mr-am, mrv2
> Affects Versions: 0.23.2
> Reporter: Jason Lowe
> Attachments: MAPREDUCE-4025.patch
>
>
> If a task attempt reports a bogus progress value (e.g.: something above 1.0)
> then the AM can crash like this:
> {noformat}
> java.lang.ArrayIndexOutOfBoundsException: 12
> at
> org.apache.hadoop.mapred.PeriodicStatsAccumulator.extend(PeriodicStatsAccumulator.java:185)
> at
> org.apache.hadoop.mapred.WrappedPeriodicStatsAccumulator.extend(WrappedPeriodicStatsAccumulator.java:31)
> at
> org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl.updateProgressSplits(TaskAttemptImpl.java:1043)
> at
> org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl.access$4100(TaskAttemptImpl.java:136)
> at
> org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl$StatusUpdater.transition(TaskAttemptImpl.java:1509)
> at
> org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl$StatusUpdater.transition(TaskAttemptImpl.java:1490)
> at
> org.apache.hadoop.yarn.state.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:357)
> at
> org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:298)
> at
> org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:43)
> at
> org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:443)
> at
> org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl.handle(TaskAttemptImpl.java:931)
> at
> org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl.handle(TaskAttemptImpl.java:135)
> at
> org.apache.hadoop.mapreduce.v2.app.MRAppMaster$TaskAttemptEventDispatcher.handle(MRAppMaster.java:886)
> at
> org.apache.hadoop.mapreduce.v2.app.MRAppMaster$TaskAttemptEventDispatcher.handle(MRAppMaster.java:878)
> at
> org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:125)
> at
> org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:74)
> at java.lang.Thread.run(Thread.java:619)
> {noformat}
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