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https://issues.apache.org/jira/browse/HBASE-2465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12858580#action_12858580
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Andrew Purtell commented on HBASE-2465:
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If choosing one, I vote for regionserver. It is a good idea to start the
regionserver RPC right away also so it can throw back NSREs to clients as soon
as possible.
> HMaster should not contact each RS on startup
> ---------------------------------------------
>
> Key: HBASE-2465
> URL: https://issues.apache.org/jira/browse/HBASE-2465
> Project: Hadoop HBase
> Issue Type: Improvement
> Components: master
> Reporter: Todd Lipcon
>
> On startup, in verifyClusterState, the master contacts each region server
> serially. If a region server is down it will retry for several minutes (if
> the client retry setting is high). During this period, the master cannot be
> shut down, and also isn't processing real work.
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