wanglijie95 opened a new pull request, #20153:
URL: https://github.com/apache/flink/pull/20153
## What is the purpose of the change
SlotPool should avoid allocating slots that located on blocked nodes. To do
that, our core idea is to keep the SlotPool in such a state: there is no slot
in SlotPool that is free (no task assigned) and located on blocked nodes.
Details are as following:
1. When receiving slot offers from task managers located on blocked nodes,
all offers should be rejected.
2. When a node is newly blocked, we should release all free(no task
assigned) slots on it. We need to find all task managers on blocked nodes and
release all free slots on them by SlotPoolService#releaseFreeSlotsOnTaskManager.
3. When a slot state changes from reserved(task assigned) to free(no task
assigned), it will check whether the corresponding task manager is blocked. If
yes, release the slot.
## Verifying this change
`BlocklistDeclarativeSlotPoolTest`
`DeclarativeSlotPoolServiceTest#testReleaseFreeSlotsOnTaskManager`
## 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 changed class annotated with
`@Public(Evolving)`: (**no**)
- The serializers: (**no**)
- The runtime per-record code paths (performance sensitive): (**no**)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (**no**)
- The S3 file system connector: (**no**)
## Documentation
- Does this pull request introduce a new feature? (**no**)
- If yes, how is the feature documented? (**not applicable**)
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