[jira] [Resolved] (YARN-1754) Container process is not really killed

["Vinod Kumar Vavilapalli (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-1754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinod Kumar Vavilapalli resolved YARN-1754.
-------------------------------------------

    Resolution: Duplicate

May be if setsid is not available, we can try traversing the process-tree and kill those processes. It is still fraught with race conditions but useful nonetheless.

IAC, this is a known issue, closing as duplicate of YARN-76.

> Container process is not really killed
> --------------------------------------
>
>                 Key: YARN-1754
>                 URL: https://issues.apache.org/jira/browse/YARN-1754
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.2.0
>         Environment: Mac
>            Reporter: Jeff Zhang
>
> I test the following distributed shell example on my mac:
> hadoop jar share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.2.0.jar -appname shell -jar share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.2.0.jar -shell_command=sleep -shell_args=1000000000 -num_containers=1
> And it will start 2 process for one container, one is the shell process, another is the real command I execute ( here is "sleep 1000000000"). 
> And then I kill this application by running command "yarn application -kill app_id"
> it will kill the shell process, but won't kill the real command process. The reason is that yarn use kill command to kill process, but it won't kill its child process. use pkill could resolve this issue.
> IMHO, it is a very important case which will make the resource usage inconsistency, and have potential security problem. 



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