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https://issues.apache.org/jira/browse/HADOOP-1351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12510063
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Arun C Murthy commented on HADOOP-1351:
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Enis, with due consideration I'd like to suggest an alternative, simpler
approach:
On receipt of {{killTask}} from the user, call
{{TaskInProgress.incompleteSubTask}} and mark the task as {{FAILED}} (and not
{{KILLED}} since you want this attempt to count against the job).
Then hack {{TaskInProgress.shouldCloseForClosedJob}} (I'd suggest rename that
to 'shouldTerminate' or something along those lines...) to return {{true}} for
that attempt so as to notify the TaskTracker on the next heartbeat. (Basically
you'll have ensure the {{taskReportedClosed}} data-structure is maintained
correctly i.e. add succesful/failed/killed taskids to this from
{{alreadyCompletedTask}}, {{completedTask}} & {{incompleteSubTask}} ).
> Want to kill a particular task or attempt
> -----------------------------------------
>
> Key: HADOOP-1351
> URL: https://issues.apache.org/jira/browse/HADOOP-1351
> Project: Hadoop
> Issue Type: New Feature
> Components: mapred
> Affects Versions: 0.12.3
> Reporter: Owen O'Malley
> Assignee: Enis Soztutar
> Fix For: 0.14.0
>
> Attachments: killTask_v1.0.1.patch
>
>
> It would be convenient to be able to kill a particular task or attempt from
> the command line. It would look like:
> bin/hadoop job -kill-task tip_0001_m_000000
> bin/hadoop job -kill-attempt task_0001_m_000000_0
> This would allow the user to tell the system to stop a particular task or
> attempt without having to restart a task tracker.
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