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From "Vivek Ganesan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9059) hadoop-daemons.sh script constraint that all the nodes should use the same installation path.
Date Thu, 10 Oct 2013 13:43:42 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13791497#comment-13791497
] 

Vivek Ganesan commented on HADOOP-9059:
---------------------------------------

I would like to take up and work on this bug.  Can someone please assign this JIRA to me?

> hadoop-daemons.sh script constraint that all the nodes should use the same installation
path.
> ---------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9059
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9059
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: bin
>    Affects Versions: 1.0.4
>         Environment: Linux
>            Reporter: Chunliang Lu
>            Priority: Critical
>   Original Estimate: 25h
>  Remaining Estimate: 25h
>
> To run command on all slave hosts, the bin/hadoop-daemons.sh will call the bin/slaves.sh
at last line:
> {code}
> exec "$bin/slaves.sh" --config $HADOOP_CONF_DIR cd "$HADOOP_HOME" \; "$bin/hadoop-daemon.sh"
--config $HADOOP_CONF_DIR "$@"
> {code}
> where slaves.sh will call ssh and pass the `cd "$HADOOP_HOME" \; "$bin/hadoop-daemon.sh"
--config $HADOOP_CONF_DIR "$@"` part to the slaves. In bash, the $HADOOP_HOME $bin, and $HADOOP_CONF_DIR
will be replaced as current settings on the master, which means that this constraints that
all the slave nodes need to share the same path setting as master node. This is not reasonable.
In my setting, the cluster has a shared NFS, and I would like to use different configuration
files for different machines. I know this is not a recommended way to manage clusters, but
I just have no choice. I think other people may face the same problem. How about replace it
like following and allow different configuration for master and slaves?
> {code}
> exec "$bin/slaves.sh" --config $HADOOP_CONF_DIR cd '$HADOOP_PREFIX' \; "bin/hadoop-daemon.sh"
"$@"
> {code}



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