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From "Ravi Gummadi (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2721) Use job control for tasks (and therefore for pipes and streaming)
Date Wed, 21 Jan 2009 14:17:59 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ravi Gummadi updated HADOOP-2721:
---------------------------------

    Attachment: HADOOP-2721-v11.1.patch

Attaching a patch which fixes a javadoc warning.

test-patch gives:

     [exec] +1 overall.
     [exec]
     [exec]     +1 @author.  The patch does not contain any @author tags.
     [exec]
     [exec]     +1 tests included.  The patch appears to include 6 new or modified tests.
     [exec]
     [exec]     +1 javadoc.  The javadoc tool did not generate any warning messages.
     [exec]
     [exec]     +1 javac.  The applied patch does not increase the total number of javac compiler
warnings.
     [exec]
     [exec]     +1 findbugs.  The patch does not introduce any new Findbugs warnings.
     [exec]
     [exec]     +1 Eclipse classpath. The patch retains Eclipse classpath integrity.




Unit tests also passed on my local machine.

> 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.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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