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https://issues.apache.org/jira/browse/HADOOP-1351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12524473
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Arun C Murthy commented on HADOOP-1351:
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Sorry, I should have reviewed this earlier... some comments:
1. {{JobTracker.killTask}} should be a *synchronized* method
2. Please don't introduce the string handling functions
{{TaskInProgress.extractJobId}} & {{TaskInProgress.extractTIPId}}, they will
break soon i.e. after we fix HADOOP-544.
{noformat}
+ String jobid = TaskInProgress.extractJobId(taskid);
+ String tipid = TaskInProgress.extractTIPId(taskid);
{noformat}
can be:
{noformat}
+ TaskInProgress tip = taskidToTIPMap.get(taskid);
+ String tipId = tip.getTIPId();
+ String jobId = tip.getJob().getStatus().getJobId();
{noformat}
> 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: 0.15.0
> Reporter: Owen O'Malley
> Assignee: Enis Soztutar
> Fix For: 0.15.0
>
> Attachments: killTask_v1.0.1.patch, killTask_v1.2.patch,
> killTask_v1.3.patch, killTask_v1.4.patch, killTask_v1.5.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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