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https://issues.apache.org/jira/browse/HADOOP-2721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12668805#action_12668805
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Vinod K V commented on HADOOP-2721:
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+1 as the code will be a lot cleaner with these suggested changes.
> Use job control for tasks (and therefore for pipes and streaming)
> -----------------------------------------------------------------
>
> Key: HADOOP-2721
> URL: https://issues.apache.org/jira/browse/HADOOP-2721
> Project: Hadoop Core
> Issue Type: Improvement
> Components: contrib/streaming, mapred, pipes
> Reporter: Owen O'Malley
> Assignee: Ravi Gummadi
> Attachments: HADOOP-2721-v10.patch, HADOOP-2721-v11.1.patch,
> HADOOP-2721-v11.3.patch, HADOOP-2721-v11.patch, HADOOP-2721-v2.patch,
> HADOOP-2721-v3.patch, HADOOP-2721-v9.patch, HADOOP-2721.patch,
> HADOOP-2721.patch, HADOOP-2721.patch
>
>
> We should use the setsid command when the task is launched to create a new
> session. We should be able to use the setsid program when we launch the bash
> process to create a new session. That will allow us to kill the entire
> session with a single signal and remove the need for the ping methods in both
> TaskTracker.Child and pipes.
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