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Posted to common-dev@hadoop.apache.org by "Vinod K V (JIRA)" <ji...@apache.org> on 2009/05/14 11:41:46 UTC

[jira] Updated: (HADOOP-5570) TaskMemoryManager should log process-tree's status while killing tasks.

     [ https://issues.apache.org/jira/browse/HADOOP-5570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinod K V updated HADOOP-5570:
------------------------------

    Attachment: HADOOP-5570-20090614.txt

Attaching a patch to fix the issue. This patch reads /proc/pid/cmdline to get the command line of each process and uses this to get the process-tree's dump. The dump is logged both on the TaskTracker and is displayed on the web-ui in the Errors tab. Added a simple test-case and also tested this on a local cluster.

> TaskMemoryManager should log process-tree's status while killing tasks.
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-5570
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5570
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>            Reporter: Vinod K V
>            Assignee: Vinod K V
>         Attachments: HADOOP-5570-20090614.txt
>
>
> This helps a lot in debugging why a particular task has gone beyond memory limits.

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