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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6606) Change the default HADOOP_PID_DIR to $HADOOP_HOME/pids
Date Tue, 02 Mar 2010 01:54:05 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12839961#action_12839961
] 

Allen Wittenauer commented on HADOOP-6606:
------------------------------------------

> There is too high a likelihood that pid files could be altered or deleted.

If this was wikipedia, I'd add a "citation needed" flag. 

> A more reasonable default is $HADOOP_HOME/pids.

Same thing.  

Why not use the logs dir rather than introduce another dir?  What happens when the mapred
framework and the hdfs framework are run as different users?  Does LinuxTaskController being
on have any impact?  What happens if hadoop-env.sh sets the pid dir, do we honor that?  Are
we building a "software fix" to work around what is ultimately an installation issue?



> 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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