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https://issues.apache.org/jira/browse/YARN-1027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13766162#comment-13766162
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Karthik Kambatla commented on YARN-1027:
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bq. Should createAndInit/Start/Stop methods in RM be synchronized? Can they
race with other activity in the RM happening on the dispatcher thread?
stop() is equivalent to stopping the RM previously. createAndInit/start also
don't change the behavior in any way. Their callers themselves are
synchronized, so I don't see the need to synchronize these as well.
bq. Was getClusterTimeStamp() addition necessary? Its good to keep refactorings
separate.
Filed another subtask under YARN-149 to address this.
Fixed all other comments.
Running a pseudo-cluster with YARN-1068 applied - will update here on the
scenarios shortly.
> Implement RMHAProtocolService
> -----------------------------
>
> Key: YARN-1027
> URL: https://issues.apache.org/jira/browse/YARN-1027
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Bikas Saha
> Assignee: Karthik Kambatla
> Attachments: test-yarn-1027.patch, yarn-1027-1.patch,
> yarn-1027-2.patch, yarn-1027-3.patch, yarn-1027-4.patch, yarn-1027-5.patch,
> yarn-1027-6.patch, yarn-1027-7.patch, yarn-1027-including-yarn-1098-3.patch,
> yarn-1027-in-rm-poc.patch
>
>
> Implement existing HAServiceProtocol from Hadoop common. This protocol is the
> single point of interaction between the RM and HA clients/services.
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