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https://issues.apache.org/jira/browse/YARN-5709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Karthik Kambatla updated YARN-5709:
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Attachment: yarn-5709.4.patch
We can't directly call the method on EmbeddedElector as it can be null, and
that was the reason I let it be. You are right though, AdminService is not the
place for that method. It was hard to pick between RMContext and RM itself
given the callers, but I ended up picking RMContext as it corresponds to state
information of the RM that we have traditionally used RMContext for.
Regarding deprecating the config for embedded, let us follow up on the other
JIRA [~templedf] is working on.
> Cleanup leader election configs and pluggability
> ------------------------------------------------
>
> Key: YARN-5709
> URL: https://issues.apache.org/jira/browse/YARN-5709
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Affects Versions: 2.8.0
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Priority: Blocker
> Attachments: yarn-5709-wip.2.patch, yarn-5709.1.patch,
> yarn-5709.2.patch, yarn-5709.3.patch, yarn-5709.4.patch
>
>
> While reviewing YARN-5677 and YARN-5694, I noticed we could make the
> curator-based election code cleaner. It is nicer to get this fixed in 2.8
> before we ship it, but this can be done at a later time as well.
> # By EmbeddedElector, we meant it was running as part of the RM daemon. Since
> the Curator-based elector is also running embedded, I feel the code should be
> checking for {{!curatorBased}} instead of {{isEmbeddedElector}}
> # {{LeaderElectorService}} should probably be named
> {{CuratorBasedEmbeddedElectorService}} or some such.
> # The code that initializes the elector should be at the same place
> irrespective of whether it is curator-based or not.
> # We seem to be caching the CuratorFramework instance in RM. It makes more
> sense for it to be in RMContext. If others are okay with it, we might even be
> better of having {{RMContext#getCurator()}} method to lazily create the
> curator framework and then cache it.
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