[SOLR-16046] Thread leak in TestLeaderElectionZkExpiry

• Type: Test
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: Tests
• Assignee: Unassigned
• Reporter: Houston Putman
• Created: 22/Feb/22 20:57
• Updated: 21/Feb/24 00:00

Description

Currently the TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry test fails roughly 11% of the time due to zombie threads.

These are zkConnectionManagerCallback threads used by the SolrZkClient.

In ConnectionManager.process(), the method being called by the thread, it is currently swallowing up an interrupted exception and always looping until a valid connection can be made to zookeeper.

Issue Links

• is broken by: SOLR-16065 Run checkIfIamStillLeader outside of a Thread in the overseer
• relates to: SOLR-16122 TestLeaderElectionZkExpiry failing frequently
• requires: SOLR-16063 Make the ZK ConnectionManager events actually single-threaded
• links to: GitHub Pull Request #690
• links to: GitHub Pull Request #841
• links to: GitHub Pull Request #842