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https://issues.apache.org/jira/browse/MAPREDUCE-4749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13488259#comment-13488259
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Vinod Kumar Vavilapalli commented on MAPREDUCE-4749:
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Even if we do the wait only for jobs that are localizing, the queue still gets
stuck and the bug at MAPREDUCE-4088 reappears.
Let's call actions that correspond to jobs that are localizing as
tainted-actions. The tight loop will result only when *ALL* the present actions
in the queue are tainted. Which should be a rare case. Even this rare case can
be fixed by keeping track of the tainted actions in a separate queue.
> Killing multiple attempts of a task taker longer as more attempts are killed
> ----------------------------------------------------------------------------
>
> Key: MAPREDUCE-4749
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4749
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 1.1.0
> Reporter: Arpit Gupta
> Assignee: Arpit Gupta
> Attachments: MAPREDUCE-4749.branch-1.patch
>
>
> The following was noticed on a mr job running on hadoop 1.1.0
> 1. Start an mr job with 1 mapper
> 2. Wait for a min
> 3. Kill the first attempt of the mapper and then subsequently kill the other
> 3 attempts in order to fail the job
> The time taken to kill the task grew exponentially.
> 1st attempt was killed immediately.
> 2nd attempt took a little over a min
> 3rd attempt took approx. 20 mins
> 4th attempt took around 3 hrs.
> The command used to kill the attempt was "hadoop job -fail-task"
> Note that the command returned immediately as soon as the fail attempt was
> accepted but the time the attempt was actually killed was as stated above.
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