Use AtomicInteger for lockIdGenerator in HRegion
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Key: HBASE-2508
URL: https://issues.apache.org/jira/browse/HBASE-2508
Project: Hadoop HBase
Issue Type: Improvement
Components: regionserver
Affects Versions: 0.20.3
Reporter: Ted Yu
Currently lockIdGenerator is an int. In obtainRowLock(), retry is needed in
case of lockId collisions.
We can declare lockIdGenerator as AtomicInteger and use incrementAndGet() to
get the next lock Id.
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