[FLINK-27572] Verify HA Metadata present before performing last-state restore

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: kubernetes-operator-1.0.0
• Component/s: Kubernetes Operator
• Labels: pull-request-available
• Assignee: Gyula Fora
• Reporter: Gyula Fora
• Created: 11/May/22 08:28
• Updated: 19/May/22 10:21
• Resolved: 16/May/22 09:37

Description

When we restore a job using the last-state logic we need to verify that the HA metadata has not been deleted. And if it's not there we need to simply throw an error because this requires manual user intervention.

This only applies when the FlinkDeployment is not already in a suspended state with recorded last state information.

The problem be reproduced easily in 1.14 by triggering a fatal job error. (turn of restart-strategy and kill TM for example). In these cases HA metadata will be removed, and the next last-state upgrade should throw an error instead of restoring from a completely empty state. 

Issue Links

• links to: GitHub Pull Request #212
• links to: GitHub Pull Request #223