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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6970) hbase-deamon.sh creates/updates pid file even when that start failed.
Date Wed, 10 Oct 2012 03:20:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13472959#comment-13472959
] 

Lars Hofhansl commented on HBASE-6970:
--------------------------------------

Also we found that the stop command does not return a failed exit code (<> 0), if the
stop fails because the running process was not found.

I am not sure how risky changing this behavior is for current installation that might rely
on the this behavior.
                
> hbase-deamon.sh creates/updates pid file even when that start failed.
> ---------------------------------------------------------------------
>
>                 Key: HBASE-6970
>                 URL: https://issues.apache.org/jira/browse/HBASE-6970
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>
> We just ran into a strange issue where could start or stop services with hbase-deamon.sh.
> The problem is this:
> {code}
>     nohup nice -n $HBASE_NICENESS "$HBASE_HOME"/bin/hbase \
>         --config "${HBASE_CONF_DIR}" \
>         $command "$@" $startStop > "$logout" 2>&1 < /dev/null &
>     echo $! > $pid
> {code}
> So the pid file is create or update even the start of the service failed. The next stop
command will then fail, because the pid file has he wrong pid in it.

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