Clean up and document locks in HRegion
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Key: HBASE-2634
URL: https://issues.apache.org/jira/browse/HBASE-2634
Project: HBase
Issue Type: Improvement
Components: regionserver
Reporter: Todd Lipcon
HRegion now has four different lock objects:
- splitsAndClosesLock (RWLock)
- newScannerLock (RWLock)
- updatesLock (RWLock)
- splitLock (Object)
It's not well documented what the purpose of each is, and I imagine we may be
able to get rid of at least one.
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