Thiruvel Thirumoolan created HIVE-9508:
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Summary: MetaStore client socket connection should have a lifetime
Key: HIVE-9508
URL: https://issues.apache.org/jira/browse/HIVE-9508
Project: Hive
Issue Type: Improvement
Components: CLI, Metastore
Reporter: Thiruvel Thirumoolan
Assignee: Thiruvel Thirumoolan
Fix For: 0.15.0
Currently HiveMetaStoreClient (or SessionHMSC) is connected to one Metastore
server until the connection is closed or there is a problem. I would like to
introduce the concept of a MetaStore client socket life time. The MS client
will reconnect if the socket lifetime is reached. This will help during rolling
upgrade of Metastore.
When there are multiple Metastore servers behind a VIP (load balancer), it is
easy to take one server out of rotation and wait for 10+ mins for all existing
connections will die down (if the lifetime is 5mins say) and the server can be
updated.
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