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https://issues.apache.org/jira/browse/HBASE-5844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13258788#comment-13258788
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nkeywal commented on HBASE-5844:
--------------------------------
I didn't know this parameter. It's interesting, because with ZK the default
timeout is 30 seconds, but with HBase it's now 180s (from hbase-default.xml).
It was increased to 60s a first time in HBASE-1772. It seems it was increased
because of the GC.
But it means that deleting immediately the ZK represents a huge mttr
improvement for the regions server crash case.
> Delete the region servers znode after a regions server crash
> ------------------------------------------------------------
>
> Key: HBASE-5844
> URL: https://issues.apache.org/jira/browse/HBASE-5844
> Project: HBase
> Issue Type: Improvement
> Components: regionserver, scripts
> Affects Versions: 0.96.0
> Reporter: nkeywal
> Assignee: nkeywal
> Attachments: 5844.v1.patch
>
>
> today, if the regions server crashes, its znode is not deleted in ZooKeeper.
> So the recovery process will stop only after a timeout, usually 30s.
> By deleting the znode in start script, we remove this delay and the recovery
> starts immediately.
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