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From "Konstantin Boudnik (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1889) [herriot] Ability to restart a single node for pushconfig
Date Wed, 07 Jul 2010 02:25:50 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12885787#action_12885787
] 

Konstantin Boudnik commented on MAPREDUCE-1889:
-----------------------------------------------

- technically, you might end up with a situation where the same host is having two different
daemons, say JT and TT. Or NN and second DN. I believe in such situation this new method {{+
 public RemoteProcess getDaemonProcess(String hostname) { }} will be deterministic. That's
why we have {{HadoopDaemonInfo}} class with a role for any daemon. Perhaps, the method should
have an extra parameter and return only daemons with a specific role.
- JavaDoc hasn't been changed for the changes of the signature
{[+  String pushConfig(String localDir) throws IOException;}}
Also, will changes of the method signature affect existing tests?

And please name the pachs {{something.patch}} instead of .txt or else.

> [herriot] Ability to restart a single node for pushconfig
> ---------------------------------------------------------
>
>                 Key: MAPREDUCE-1889
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1889
>             Project: Hadoop Map/Reduce
>          Issue Type: New Feature
>          Components: test
>            Reporter: Balaji Rajagopalan
>            Assignee: Balaji Rajagopalan
>         Attachments: restartDaemon.txt, restartDaemon_1.txt
>
>
> Right now the pushconfig is supported only at a cluster level, this jira will introduce
the functionality to be supported at node level. 

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