Lower mini cluster shutdown time in HRegionServer#waitOnAllRegionsToClose and
ServerManager#letRegionServersShutdown
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Key: HBASE-4780
URL: https://issues.apache.org/jira/browse/HBASE-4780
Project: HBase
Issue Type: Improvement
Components: master, regionserver, test
Affects Versions: 0.94.0
Environment: all
Reporter: nkeywal
Assignee: nkeywal
Priority: Minor
HRegionServer#waitOnAllRegionsToClose sleep 1s
Lower waiting time
benefits: around 0.8s at shutdown
ServerManager.letRegionServersShutdown() waits 1 second => responsible for 0.5
seconds in a HBase cluster stops
Can be replaced by a notification
Benefits: around 0.5s at shutdown
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