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https://issues.apache.org/jira/browse/YARN-1734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13918365#comment-13918365
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Karthik Kambatla commented on YARN-1734:
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In our case, we plan to use the LocalConfiguration and not the FileSystemBased
one. So, in the HA case, we would update the local configs on both RMs and call
the appropriate refresh command on both RMs - this is what we do for HDFS as
well. The expectation is that the Active picks these up immediately, and the
Standby picks them eventually when it becomes Active. In other words, the
expectation is that these updates are not lost.
With the current code, the Standby would throw a StandbyException, thereby
telling the user that the config refresh has failed. This is not exactly true,
because the Standby would actually pick the latest configs when transitioning
to Active. No?
Let me think more on this, but thought I should raise this concern.
> RM should get the updated Configurations when it transits from Standby to
> Active
> --------------------------------------------------------------------------------
>
> Key: YARN-1734
> URL: https://issues.apache.org/jira/browse/YARN-1734
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Xuan Gong
> Assignee: Xuan Gong
> Priority: Critical
> Fix For: 2.4.0
>
> Attachments: YARN-1734.1.patch, YARN-1734.2.patch, YARN-1734.3.patch,
> YARN-1734.4.patch, YARN-1734.5.patch, YARN-1734.6.patch, YARN-1734.7.patch
>
>
> Currently, we have ConfigurationProvider which can support
> LocalConfiguration, and FileSystemBasedConfiguration. When HA is enabled, and
> FileSystemBasedConfiguration is enabled, RM can not get the updated
> Configurations when it transits from Standby to Active
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