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https://issues.apache.org/jira/browse/MAPREDUCE-5835?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ming Ma updated MAPREDUCE-5835:
-------------------------------
Attachment: MAPREDUCE-5835.patch
Here is the patch with the fix and the unit test that reproduces the race
condition. There might be other ways to fix the issues.
> Killing Task might cause the job to go to ERROR state
> -----------------------------------------------------
>
> Key: MAPREDUCE-5835
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5835
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Ming Ma
> Assignee: Ming Ma
> Attachments: MAPREDUCE-5835.patch
>
>
> There could be a race condition if job is killed right after task attempt
> receives TA_DONE event. In that case, TaskImpl might receive
> T_ATTEMPT_SUCCEEDED followed by T_ATTEMPTED_KILLED for the same attempt, thus
> transition job to ERROR state.
> a. The task is in KILL_WAIT.
> b. TA receives TA_DONE event.
> c. Before TA transitions to SUCCEEDED state, Task sends TA_KILL event.
> d. TA transitions to SUCCEEDED state and thus send T_ATTEMPT_SUCCEEDED to the
> task. The task transitions to KILLED state.
> e. TA processes TA_KILL event and sends T_ATTEMPT_KILLED to the task.
> f. When task is in KILLED state, it can't handle T_ATTEMPT_KILLED event, thus
> transition job to ERROR state.
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