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From "Xuan Gong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2211) RMStateStore needs to save AMRMToken master key for recovery when RM restart/failover happens
Date Thu, 24 Jul 2014 19:58:40 GMT

    [ https://issues.apache.org/jira/browse/YARN-2211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14073577#comment-14073577
] 

Xuan Gong commented on YARN-2211:
---------------------------------

bq. This code not needed? may remove the newInstance() method also

It is used in RMStateStore initiation. 

bq. currentKey will never be null ? if so, we can remove the check.

Might need to keep the NULL check. If the RM is start from the brand new state, there are
no states at all. So, the currentKey is NULL.

bq. Instead of moving the following to yarn_proto, we should probably have a separate jira
to move all the RM recovery related records to resource manager module. For now, I think we
can create a new proto file and move amrm token state there.

We can do that. 

> RMStateStore needs to save AMRMToken master key for recovery when RM restart/failover
happens 
> ----------------------------------------------------------------------------------------------
>
>                 Key: YARN-2211
>                 URL: https://issues.apache.org/jira/browse/YARN-2211
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Xuan Gong
>            Assignee: Xuan Gong
>         Attachments: YARN-2211.1.patch, YARN-2211.2.patch, YARN-2211.3.patch, YARN-2211.4.patch,
YARN-2211.5.1.patch, YARN-2211.5.patch, YARN-2211.6.1.patch, YARN-2211.6.patch
>
>
> After YARN-2208, AMRMToken can be rolled over periodically. We need to save related Master
Keys and use them to recover the AMRMToken when RM restart/failover happens



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