[HIVE-23409] If TezSession application reopen fails for Timeline service down, default TezSession from SessionPool is closed after a retry

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.0-alpha-1
• Assignee: Naresh P R
• Reporter: Naresh P R
• Created: 08/May/20 03:41
• Updated: 17/Nov/22 08:48
• Resolved: 13/May/20 03:23

Description

we are closing a default session from TezSessionPool at here.

https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/tez/TezTask.java#L589

If all the sessions in a pool are destroyed, queries wait indefinitely at TezSessionPool.getSession until HS2 restarts after other service recoveries.

[HiveServer2-Background-Pool: Thread-12345]: tez.TezSessionPoolManager ()) - We are closing a default session because of retry failure.

It's better if we allow retry & fail than hung.