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https://issues.apache.org/jira/browse/HDFS-7708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15125929#comment-15125929
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Akira AJISAKA commented on HDFS-7708:
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Hi [~rakeshr], how is this issue going on? I'd like to take it over if you
don't have time.
> Balancer should delete its pid file when it completes rebalance
> ---------------------------------------------------------------
>
> Key: HDFS-7708
> URL: https://issues.apache.org/jira/browse/HDFS-7708
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer & mover
> Affects Versions: 2.6.0
> Reporter: Akira AJISAKA
> Assignee: Rakesh R
> Attachments: HDFS-7708.patch
>
>
> When balancer completes rebalance and exits, it does not delete its pid file.
> Starting balancer again, then "kill -0 pid" to confirm the balancer process
> is not running.
> The problem is: If another process is running as the same pid as `cat
> pidfile`, balancer fails to start with following message:
> {code}
> balancer is running as process 3443. Stop it first.
> {code}
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