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https://issues.apache.org/jira/browse/YARN-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14390122#comment-14390122
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Rohith commented on YARN-2268:
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Thinking on this jira, getting many questions.
# How to identify RM is running since RM can be formated from anywhere in the
cluster?
# In HA, for each rm-ids to be checked for serviceState. This would result in
time consuming for each hosts retry would take time. If switch happens in the
middle while checking rm-ids, it would give wrong result that all RM's are in
standby.
I think if admin support is there, 1st can be solved easily.
> Disallow formatting the RMStateStore when there is an RM running
> ----------------------------------------------------------------
>
> Key: YARN-2268
> URL: https://issues.apache.org/jira/browse/YARN-2268
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.6.0
> Reporter: Karthik Kambatla
> Assignee: Rohith
>
> YARN-2131 adds a way to format the RMStateStore. However, it can be a problem
> if we format the store while an RM is actively using it. It would be nice to
> fail the format if there is an RM running and using this store.
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