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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7204) balancer doesn't run as a daemon
Date Thu, 09 Oct 2014 00:42:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14164484#comment-14164484
] 

Allen Wittenauer commented on HDFS-7204:
----------------------------------------

(It's probably worth pointing out that this is one of the big benefits of the shell rewrite.
 Prior to 9902, if you wanted to turn a subcommand into a daemon, you either had to know the
magic incantation to give hadoop-daemon.sh, hack on one of the existing sbin scripts, or build
a custom sbin script such as was done for balancer.  In trunk, turning into a daemon is just
one line in the appropriate script:  daemon="true".  Case in point, adding that to hdfs' balancer
case statement does 99% of the work in this issue.  The rest is just minor fixing of backward
compatibility issues!  This means that for HDFS-7184, it's literally a single line fix.)

> balancer doesn't run as a daemon
> --------------------------------
>
>                 Key: HDFS-7204
>                 URL: https://issues.apache.org/jira/browse/HDFS-7204
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: scripts
>            Reporter: Allen Wittenauer
>            Assignee: Allen Wittenauer
>              Labels: newbie
>         Attachments: HDFS-7204-01.patch, HDFS-7204.patch
>
>
> From HDFS-7184, minor issues with balancer:
> * daemon isn't set to true in hdfs to enable daemonization
> * start-balancer script has usage instead of hadoop_usage



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