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https://issues.apache.org/jira/browse/HADOOP-15527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16510151#comment-16510151
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Eric Yang commented on HADOOP-15527:
------------------------------------
{code}
timeout=$(printf "%.0f\n" ${timeout})
{code}
Can be simplified to:
{code}
timeout=$((0 + ${timeout}))
{code}
To avoid shellcheck warning.
> 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-15527.1.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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