[HIVE-18994] Handle client connections on failover

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: HiveServer2
• Target Version/s: 3.0.0
• Assignee: Prasanth Jayachandran
• Reporter: Prasanth Jayachandran
• Created: 19/Mar/18 23:15
• Updated: 22/May/18 23:13
• Resolved: 27/Mar/18 22:50

Description

When leader failover happens (either automatically or manually), tez sessions are closed. But client connections are not. We need to close the client connections explicitly so that workload manager revokes all the guaranteed slots and upon reconnection client will connect to active HS2 instance (this is to avoid clients reusing the same connection and submitting queries to passive HS2). In future, some timeout or other policies (may be WM will run everything speculatively) can be added.

Issue Links

• links to: RB