[
https://issues.apache.org/jira/browse/HDFS-7708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15134056#comment-15134056
]
Rakesh R commented on HDFS-7708:
--------------------------------
bq. At least in trunk (and maybe branch-2?), this code won't work. It needs to
know the name of the pid file which, at least today, is controlled by the shell
code
Thanks [~aw] for the comments. AFAIK pid file pattern contains {{COMMAND}}
part, in case of balancer the pid file name will be ending with =>
{{balancer.pid}} string. In my patch, I've used {{FilenameFilter}} which will
be filtering out the balancer file by searching
{{filename.endsWith("balancer.pid");}} file pattern under the
{{HADOOP_PID_DIR}} directory.
> 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-7708-002.patch, 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}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
