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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-1222) Make improvements in ZKRMStateStore for fencing
Date Mon, 04 Nov 2013 20:12:18 GMT

     [ https://issues.apache.org/jira/browse/YARN-1222?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Karthik Kambatla updated YARN-1222:
-----------------------------------

    Attachment: yarn-1222-4.patch

Updating new patch. If HA is enabled, when any of the ZK operations result in KeeperException.NoAuthException,
the RM is automatically transitioned to Standby state. Added unit test to verify fencing works.





> Make improvements in ZKRMStateStore for fencing
> -----------------------------------------------
>
>                 Key: YARN-1222
>                 URL: https://issues.apache.org/jira/browse/YARN-1222
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Bikas Saha
>            Assignee: Karthik Kambatla
>         Attachments: yarn-1222-1.patch, yarn-1222-2.patch, yarn-1222-3.patch, yarn-1222-4.patch
>
>
> Using multi-operations for every ZK interaction. 
> In every operation, automatically creating/deleting a lock znode that is the child of
the root znode. This is to achieve fencing by modifying the create/delete permissions on the
root znode.



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