Dennis-Mircea opened a new pull request, #1240:
URL: https://github.com/apache/flink-kubernetes-operator/pull/1240
## What is the purpose of the change
This PR fixes the stateless job recovery and health-check restart behavior
under HA.
The operator previously required HA metadata for every recovery and health
check restart, including stateless jobs, so a stateless job whose per-job HA
ConfigMap is gone failed with `RestoreFailed` instead of being redeployed.
The requirement now depends on whether usable metadata exists: a stateless
job keeps restoring from its latest checkpoint while the HA metadata holds one,
and is redeployed from empty state only once the metadata is gone.
Supersedes #1147, which reported the health-check trigger and proposed never
using the last-state restore for stateless jobs. This discards the checkpoint
even when the metadata is still intact, and leaves the per-job HA ConfigMap
orphaned, because deploy skips cluster cleanup when the JobManager is already
missing.
## Brief change log
- `ApplicationReconciler#reconcileOtherChanges` derives `requireHaMetadata`
through the new `requireHaMetadataForResubmit`: HA enabled, and either a
stateful upgrade mode or HA metadata available. Non-stateless jobs and
deployments without HA behave as before.
- Docs: the `stateless` upgrade-mode bullet states that recovering a missing
deployment and restarting an unhealthy one are failovers that restore from the
latest checkpoint while HA metadata exists. The self-healing sections and their
limitations entry no longer claim HA is required for stateless jobs, and the
leader-election limitation covers both triggers. Mirrored to `docs/content.zh`.
## Verifying this change
The change can be verified by the new tests added.
The change was also verified manually on minikube on the cases presented in
the JIRA.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): no
- The public API, i.e., is any changes to the `CustomResourceDescriptors`:
no
- Core observer or reconciler logic that is regularly executed: no
## Documentation
- Does this pull request introduce a new feature? no
- If yes, how is the feature documented? not applicable
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