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https://issues.apache.org/jira/browse/HADOOP-7586?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved HADOOP-7586.
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Resolution: Duplicate
> Hadoop daemon does not clean up pid file upon normal shutdown
> -------------------------------------------------------------
>
> Key: HADOOP-7586
> URL: https://issues.apache.org/jira/browse/HADOOP-7586
> Project: Hadoop Common
> Issue Type: Improvement
> Components: scripts
> Affects Versions: 0.22.0, 0.23.0, 0.24.0
> Environment: Linux
> Reporter: Joep Rottinghuis
> Assignee: Joep Rottinghuis
> Priority: Minor
>
> hadoop-daemon.sh script created pid files on when namenode, jobtrackers, etc.
> deamons are started.
> When the deamon is stopped in a regular manner through the stop script, it
> should clean up the pid file to indicate normal controlled exit.
> Presence of a pid without running corresponding process would then indicated
> abnormal end of the process.
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