liangyepianzhou opened a new pull request, #20569:
URL: https://github.com/apache/pulsar/pull/20569
## Motivation
During the recovery process, if the system topic
`__transaction_buffer_snapshot` is not located on the same broker as the common
topic, it can cause issues and result in a `ServiceUnitNotReadyException`,
leading to recovery failure. The current approach of using
`topic.getBrokerService().getTopic()` to check the existence of the system
topic can trigger errors during the `checkTopicNsOwnership` step.
## Modification
To avoid potential recovery failures and ensure a reliable check for topic
existence, we should use the `pulsarResource` feature. By utilizing
`pulsarResource`, we can list the persistent topics in the namespace and verify
whether the system topic exists on any broker. This approach provides a more
robust solution, preventing the occurrence of `ServiceUnitNotReadyException`
and ensuring successful recovery in scenarios where the system topic is not
located on the same broker as the common topic.
### Verifying this change
- [ ] Make sure that the change passes the CI checks.
*(Please pick either of the following options)*
This change is a trivial rework / code cleanup without any test coverage.
*(or)*
This change is already covered by existing tests, such as *(please describe
tests)*.
*(or)*
This change added tests and can be verified as follows:
*(example:)*
- *Added integration tests for end-to-end deployment with large payloads
(10MB)*
- *Extended integration test for recovery after broker failure*
### Does this pull request potentially affect one of the following parts:
<!-- DO NOT REMOVE THIS SECTION. CHECK THE PROPER BOX ONLY. -->
*If the box was checked, please highlight the changes*
- [ ] Dependencies (add or upgrade a dependency)
- [ ] The public API
- [ ] The schema
- [ ] The default values of configurations
- [ ] The threading model
- [ ] The binary protocol
- [ ] The REST endpoints
- [ ] The admin CLI options
- [ ] The metrics
- [ ] Anything that affects deployment
### 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: <!-- ENTER URL HERE -->
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