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Posted to yarn-issues@hadoop.apache.org by "Bikas Saha (JIRA)" <ji...@apache.org> on 2014/01/10 19:02:50 UTC

[jira] [Commented] (YARN-1584) Support explicit failover when automatic failover is enabled

    [ https://issues.apache.org/jira/browse/YARN-1584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13868051#comment-13868051 ] 

Bikas Saha commented on YARN-1584:
----------------------------------

Explicitly asking an RM to failover is where the RM gives up control and does not participate in leader election such that the other RM can take over. Right?
How is this different from shutting down the first RM, thus enabling the second RM to take over?

> Support explicit failover when automatic failover is enabled
> ------------------------------------------------------------
>
>                 Key: YARN-1584
>                 URL: https://issues.apache.org/jira/browse/YARN-1584
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 2.4.0
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>
> YARN-1029 adds automatic failover support. However, users can't explicitly ask for a failover from one RM to the other without stopping the other RM. Stopping the RM until the other RM takes over exposes the RM-ensemble to SPOF for the duration. 
> It would be nice to allow explicit failover through yarn rmadmin -failover command.
> PS: HDFS supports -failover option. 



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