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From "Tom White (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-231) Add persistent store implementation for RMStateStore
Date Tue, 27 Nov 2012 17:13:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13504772#comment-13504772
] 

Tom White commented on YARN-231:
--------------------------------

bq. Errors could either be because of store error or loss of master status.

Do you mean loss of master status of the RM doing the store? I wouldn't expect the store to
know about the master's status, since that would be handled at a higher level (i.e. by the
RM itself). So IOException would be sufficient, at least for this JIRA.

bq. All interfaces are marked Evolving for this reason.

It would be better to use Unstable until the RM HA work is done. Evolving would mean that
you couldn't change the exceptions between 2.0.3 and 2.0.4 (say).
                
> Add persistent store implementation for RMStateStore
> ----------------------------------------------------
>
>                 Key: YARN-231
>                 URL: https://issues.apache.org/jira/browse/YARN-231
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Bikas Saha
>            Assignee: Bikas Saha
>         Attachments: YARN-231.1.patch
>
>
> Add stores that write RM state data to ZooKeeper and FileSystem 

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