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https://issues.apache.org/jira/browse/HADOOP-6606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12839981#action_12839981
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Eli Collins commented on HADOOP-6606:
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Having a configuration option for the pid dir is genuinely useful, as seen on
the lists the default frequently bites new users.
Other programs provide similar options, eg see
http://httpd.apache.org/docs/1.3/mod/core.html#pidfile.
What's the default pid directory on solaris? Googling doesn't seem to turn up
one, if there's no standard across the operating systems than defaulting to a
hadoop base dir, the same raitionale was used for the logs dir no?
> Change the default HADOOP_PID_DIR to $HADOOP_HOME/pids
> ------------------------------------------------------
>
> Key: HADOOP-6606
> URL: https://issues.apache.org/jira/browse/HADOOP-6606
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 0.20.2
> Reporter: Chad Metcalf
> Assignee: Chad Metcalf
> Attachments: HADOOP-6606.patch
>
>
> /tmp should not be used as a pid directory. There is too high a likelihood
> that pid files could be altered or deleted. A more reasonable default is
> $HADOOP_HOME/pids.
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