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From "Rohith (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2588) Standby RM does not transitionToActive if previous transitionToActive is failed with ZK exception.
Date Fri, 17 Oct 2014 02:47:34 GMT

    [ https://issues.apache.org/jira/browse/YARN-2588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14174673#comment-14174673
] 

Rohith commented on YARN-2588:
------------------------------

In RMWebApp, we have code below where ApplicationACLManager and QueueACL managers are part
of ActiveServices instances binded to RMWebApp. IIUC, these are not needed for starting in
standby mode. I would like to know reason behind why these 2 active service instances are
binded to RMWebApp.?
{code}
   if (rm != null) {
      bind(ResourceManager.class).toInstance(rm);
      bind(RMContext.class).toInstance(rm.getRMContext());
      bind(ApplicationACLsManager.class).toInstance(
          rm.getApplicationACLsManager());
      bind(QueueACLsManager.class).toInstance(rm.getQueueACLsManager());
    }
{code}

> Standby RM does not transitionToActive if previous transitionToActive is failed with
ZK exception.
> --------------------------------------------------------------------------------------------------
>
>                 Key: YARN-2588
>                 URL: https://issues.apache.org/jira/browse/YARN-2588
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 3.0.0, 2.6.0, 2.5.1
>            Reporter: Rohith
>            Assignee: Rohith
>         Attachments: YARN-2588.1.patch, YARN-2588.patch
>
>
> Consider scenario where, StandBy RM is failed to transition to Active because of ZK exception(connectionLoss
or SessionExpired). Then any further transition to Active for same RM does not move RM to
Active state.



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