Alexander Kolbasov created HIVE-18039:
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Summary: Use ConcurrentHashMap for CachedStore
Key: HIVE-18039
URL: https://issues.apache.org/jira/browse/HIVE-18039
Project: Hive
Issue Type: Improvement
Components: Hive
Affects Versions: 3.0.0
Reporter: Alexander Kolbasov
SharedCache used by CachedStore uses single big lock to synchronize all access.
This looks like an overkill - looks like it is possible to use
ConcurrentHashMap instead. Also it makes sense to move deepCopy() operations
outside the lock to reduce lock hold times.
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