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From "Vetle Roeim (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-466) Startup scripts will not start instances of Hadoop daemons w/different configs w/o setting separate PID directories
Date Thu, 24 Aug 2006 06:51:12 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-466?page=comments#action_12430174 ] 
            
Vetle Roeim commented on HADOOP-466:
------------------------------------

How does _not_ having HADOOP_IDENT_STRING prevent running multiple instances on the same conf
dir as different users? The configuration contains port numbers, and the Hadoop daemons won't
start if there are already daemons bound to those ports.

In any case, running with separate config directories has been greatly simplified with the
introduction of the --config command line parameter.

> Startup scripts will not start instances of Hadoop daemons w/different configs w/o setting
separate PID directories
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-466
>                 URL: http://issues.apache.org/jira/browse/HADOOP-466
>             Project: Hadoop
>          Issue Type: Improvement
>    Affects Versions: 0.5.0
>            Reporter: Vetle Roeim
>             Fix For: 0.6.0
>
>         Attachments: hadoop-466.diff
>
>
> Configuration directories can be specified by either setting HADOOP_CONF_DIR or using
the --config command line option. However, the hadoop-daemon.sh script will not start the
daemons unless the PID directory is separate for each configuration.
> The issue is that the code for generating PID filenames is not dependent on the configuration
directory. While the PID directory can be changed in hadoop-env.sh, it seems a little unnecessary
to have this restriction.

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