Sudheesh Katkam created DRILL-4774:
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Summary: Replace NonCloseableHiveClientWithCaching
Key: DRILL-4774
URL: https://issues.apache.org/jira/browse/DRILL-4774
Project: Apache Drill
Issue Type: Bug
Reporter: Sudheesh Katkam
Likely the intention was that a NonCloseableHiveClientWithCaching object will
be used as long as the Drill process lives.
(1) Given how StoragePluginRegistryImpl works (see createOrUpdate),
HiveSchemaFactory leaks a NonCloseableHiveClientWithCaching every time the hive
storage plugin is updated (because close is not invoked).
(2) I am not sure if the HiveMetastore and HiveMetaStoreClient communication
path has a heartbeat mechanism. Otherwise when Drill is shutdown, from
metastore point of view, at least one connection to the metastore is not closed.
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