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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9933) Augment Service model to support starting stopped services
Date Mon, 16 Sep 2013 14:14:52 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9933?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13768332#comment-13768332
] 

Karthik Kambatla commented on HADOOP-9933:
------------------------------------------

The PAUSED state with boolean standby() and resume() operations make sense to me. If you agree,
we should go ahead and do this, I ll work on a POC patch.
                
> Augment Service model to support starting stopped services
> ----------------------------------------------------------
>
>                 Key: HADOOP-9933
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9933
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 2.1.0-beta
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>              Labels: service
>
> For ResourceManager-HA (YARN-149 and co), we would want to start/stop/start RM's active
services as it transitions to Active/Standby/Active respectively. In the current service model,
we can't start the services that are already stopped.
> Would be nice to augment this. To avoid accidental restart of stopped services, we can
add another API: start(boolean restartIfStopped). Thoughts?

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