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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15527) loop until TIMEOUT before sending kill -9
Date Mon, 18 Jun 2018 21:24:20 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16516364#comment-16516364

Vinod Kumar Vavilapalli commented on HADOOP-15527:

bq. FYI: this patch is a bit fragile due to some assumptions made about the environment.
[~aw], I did try to to minimize problems like that to my knowledge, but if you can point out
the specific issues, I can fix them..

> loop until TIMEOUT before sending kill -9
> -----------------------------------------
>                 Key: HADOOP-15527
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15527
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Vinod Kumar Vavilapalli
>            Priority: Major
>             Fix For: 3.2.0, 3.1.1
>         Attachments: HADOOP-15527.1.txt, HADOOP-15527.2.txt, HADOOP-15527.txt
> I'm seeing that sometimes daemons keep running for a little while even after "kill -9"
from daemon-stop scripts.
> Debugging more, I see several instances of "ERROR: Unable to kill ${pid}".
> Saw this specifically with ResourceManager & NodeManager -  {{yarn --daemon stop
nodemanager}}. Though it is possible that other daemons may run into this too.
> Saw this on both Centos as well as Ubuntu.

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