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https://issues.apache.org/jira/browse/YARN-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14496103#comment-14496103
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Rohith commented on YARN-2268:
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I propose the following way to handle disallow state store when RM is running.
For both HA(Active and Standby) and Non-HA, it is possible to get RM state
using REST API getClusterInfo('ws/v1/cluster/info'). This can be make use for
identifying RM state. This is independent of any state store implementaions.
In HA, ACTIVE state is checked with all the the RM-Id's in a sequential manner.
If no ACTIVE state RM is found then format the store otherwise throw an
exception *ActiveResourceManagerRunningException*.
Cons : Formatting state store when HA is enabled is *Best Effort* basis, there
would be scenario where RM state can be chagned after one of the RM is checked.
Kindly share your thoughts on this approach..
> 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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