Eric Yang commented on HADOOP-15527:

In the batch file, hadoop_stop_daemon is renamed to 
hadoop_stop_daemon_changing_pid.  Is this change necessary?

> Sometimes daemons keep running even after "kill -9" from daemon-stop script
> ---------------------------------------------------------------------------
>                 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
>         Attachments: 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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