Jason Dere created HIVE-19127:
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Summary: Concurrency fixes in QueryResultsCache
Key: HIVE-19127
URL: https://issues.apache.org/jira/browse/HIVE-19127
Project: Hive
Issue Type: Sub-task
Reporter: Jason Dere
Assignee: Jason Dere
A few fixes around concurrent access in the results cache
- Take a lock on the cache entry when in the process of setting the cache entry
from PENDING state to VALID state, so that other threads cannot invalidate the
entry
- The write lock on the cache was not being taken when removing an entry from
the cache.
- synchronize access when iterating through the lru keyset
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