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https://issues.apache.org/jira/browse/MAPREDUCE-3985?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bikas Saha resolved MAPREDUCE-3985.
-----------------------------------
Resolution: Not A Problem
Not an issue. I got confused between AttemptKilledTransition and KillTransition.
> handleTaskAttemptCompletion() called twice for same task attempt from
> KillWaitAttemptKilledTransition & AttemptKilledTransition
> -------------------------------------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-3985
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3985
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mr-am
> Affects Versions: 0.23.0
> Reporter: Bikas Saha
> Assignee: Bikas Saha
> Fix For: 0.23.2
>
>
> TaskImpl state changes to KILL_WAIT after an AttemptKilledTransition. When
> the attempt reports that it has actually been killed then KILL_WAIT
> transitions out via the KillWaitAttemptKilledTransition. Both these
> transitions send task completion events to Job with the same Killed state.
> The handler simply puts them in a list and so nothing bad has happened till
> now.
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