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https://issues.apache.org/jira/browse/HBASE-9734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13993970#comment-13993970
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Mikhail Antonov commented on HBASE-9734:
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It may be not that easy as just calling HRegionServer.deleteMyEphemeralNode()
and ZNodeClearer.deleteMyEphemeralNodeOnDisk(); first thing in
HRegionServer.abort(), is it?
Can we delete znode before we call closeWAL() in run() method?
> Save 3-4 seconds by having master purge znode rather than wait on RS exit
> -------------------------------------------------------------------------
>
> Key: HBASE-9734
> URL: https://issues.apache.org/jira/browse/HBASE-9734
> Project: HBase
> Issue Type: Improvement
> Components: MTTR
> Reporter: stack
> Priority: Critical
>
> If RS is aborting (in my current case because SSR and ran out of DM), it will
> tell the Master its exiting by calling reportRSFatalError on the Master
> Interface. Master adds the RS to its list of fatal regionservers but that is
> about it.
> RS tries to clean up best as it can and exit out quickly but if carrying
> regions it can be seconds before it gets to the purge of its ephemeral node,
> and then the Master needs to notice it and only then can it start in on log
> splitting.
> RS should purge ephemeral node immediately on abort or Master needs to do it
> and start log splitting as soon as the RS reports fatal error. In my case
> here would save at least 4 seconds, a small cluster, with only a few regions
> so there is more to be had in a bigger setup.
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