[FLINK-32413] Add fallback error handler to DefaultLeaderElectionService

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.18.0
• Component/s: Runtime / Coordination
• Labels: pull-request-available
• Assignee: Matthias Pohl
• Reporter: Matthias Pohl
• Created: 22/Jun/23 10:47
• Updated: 26/Jun/23 09:48
• Resolved: 26/Jun/23 09:48

Description

The FLIP-285 work separated the driver lifecycle from the contender lifecycle. Now, a contender can be removed but the driver could still be running. Error could be produced on the driver's side. The DefaultLeaderElectionService would try to forward the error to the contender. With not contender being registered, the error would be swallowed.

We should add a fallback error handler for this specific case.

Issue Links

• links to: GitHub Pull Request #22846