poorbarcode opened a new pull request, #22090:
URL: https://github.com/apache/pulsar/pull/22090
### Motivation
Context:
- After a consumer closes, it may leave an in-progress acknowledge task.
Issue:
- There are two consumers: `c1` and `c2`
- `c1` received a batch message: `ledger: L1, entry: E1, batch-size: 100`.
- `c1` was closed, after leaving an in-progress task to acknowledge `{L1,
E1, batch_index: 1}`
- Pulsar read `{L1, E1}` and tries to delivery to `c2`.
- The acknowledgement `{L1, E1, batch_index: 1}` is finished.
- `c2` gets `100` messages, but `unackedMessages` of `c2` is `98`.
We can always get the warn logs like below:
```
07:01:11.037 [pulsar-io-4-17] WARN
org.apache.pulsar.broker.service.Consumer - unackedMsgs is : -1,
```
### Modifications
Fix the bug.
### Documentation
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- [ ] `doc` <!-- Your PR contains doc changes. -->
- [ ] `doc-required` <!-- Your PR changes impact docs and you will update
later -->
- [x] `doc-not-needed` <!-- Your PR changes do not impact docs -->
- [ ] `doc-complete` <!-- Docs have been already added -->
### Matching PR in forked repository
PR in forked repository: x
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