[jira] Commented: (HADOOP-5420) Support killing of process groups in LinuxTaskController binary

["Vinod K V (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-5420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12697400#action_12697400 ] 

Vinod K V commented on HADOOP-5420:
-----------------------------------

Looked at the patch. I think we should set the default value for _mapred.tasktracker.tasks.sleeptime-before-sigkill_ to be 5 seconds in the taskcontroller.cfg itself so that it serves as a source of documentation for the default value.

Another point that may be the content of another JIRA, The issue, though not directly related to this patch, but that gets a bit amplified with this patch is the fact that we have a separate configuration for task-controller. _mapred.tasktracker.tasks.sleeptime-before-sigkill_ is already provided via mapred configuration and admins will have two places to chose depending on the task-controller in use. Further, in the current code, this parameter is job configurable and as part of HADOOP-5614, Ravi is planning to have a job configurable _mapred.job.tasks.sleeptime-before-sigkill_ and a TT level _mapred.job.tasks.sleeptime-before-sigkill_.

> Support killing of process groups in LinuxTaskController binary
> ---------------------------------------------------------------
>
>                 Key: HADOOP-5420
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5420
>             Project: Hadoop Core
>          Issue Type: Bug
>            Reporter: Sreekanth Ramakrishnan
>            Assignee: Sreekanth Ramakrishnan
>         Attachments: hadoop-5420.patch
>
>
> Support setsid based kill in LinuxTaskController.

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