litiliu opened a new pull request, #4609:
URL: https://github.com/apache/flink-cdc/pull/4609
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## What is the purpose of this pull request?
Fix [FLINK-41312](https://issues.apache.org/jira/browse/FLINK-41312).
When a partition is dropped or expires while a Fluss pipeline source is
running, its splits and SDK subscriptions can remain active even though the
logical table still exists. Repeated metadata requests for the absent partition
can delay or stall consumption of surviving partitions.
This change builds on the complete partition inventory introduced by
[#4608](https://github.com/apache/flink-cdc/pull/4608)
([FLINK-41313](https://issues.apache.org/jira/browse/FLINK-41313)) and retires
already-active splits for absent partitions.
This PR currently includes the shared changes from #4608 in its diff against
`master`. After #4608 is merged, I will rebase this PR onto `master` so that
only the running-reader retirement changes remain.
## Brief change log
- Compare active reader splits with each successful complete partition
inventory and request cleanup for absent partitions.
- Execute precise partition/bucket unsubscribe and active or queued snapshot
cancellation on the fetcher thread.
- Return removed split IDs through the normal finished-split path while
preserving surviving partitions and logical-table schema/resources.
- Keep existing checkpoint serializer versions and split IDs. Same-name
partition recreation with a new physical ID remains outside this change.
---
## Verifying this change
Added ITs for partition-scoped SDK cleanup while preserving consumption of
surviving partitions.
## Documentation
- Does this pull request introduce a new feature? No; this is a bug fix.
- If yes, how is the feature documented? Not applicable.
---
##### Was generative AI tooling used to co-author this PR?
- [X] Yes — OpenAI Codex (GPT-6); GitHub Copilot (Claude Opus 5.5, read-only
design discussion).
Generated-by: OpenAI Codex (GPT-6); GitHub Copilot (Claude Opus 5.5)
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