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https://issues.apache.org/jira/browse/HBASE-24490?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Semen Komissarov updated HBASE-24490:
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Assignee: Semen Komissarov
Status: Patch Available (was: Open)
> Revisit onlineRegions and onlineRegionsLock in HRegionServer
> ------------------------------------------------------------
>
> Key: HBASE-24490
> URL: https://issues.apache.org/jira/browse/HBASE-24490
> Project: HBase
> Issue Type: Task
> Components: regionserver
> Reporter: Duo Zhang
> Assignee: Semen Komissarov
> Priority: Major
>
> The onlineRegionsLock is only used in closeMetaTableRegions and
> closeUserRegions, and only writeLock is used so I wonder whether we can
> change it to a Lock instead of ReadWriteLock.
> And also, in the several getRegions method, we have synchronized
> (this.onlineRegions), which is not necessary, since the onlineRegions is
> already a ConcurrentMap.
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