Weiwei Yang created HDFS-12701:
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Summary: More fine-grained locks in ShortCircuitCache
Key: HDFS-12701
URL: https://issues.apache.org/jira/browse/HDFS-12701
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 2.8.1
Reporter: Weiwei Yang
When cluster is heavily loaded, we found HBase regionserver handlers are often
blocked by {{ShortCircuitCache}}. Dumped jstack and found more lots of thread
waiting on obtain the cache lock. It should be able to be improved by using
more fine-grained locks to improve the performance.
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