hangc0276 opened a new pull request, #24597:
URL: https://github.com/apache/pulsar/pull/24597
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### Motivation
RawReader is a wrapper for Consumer, but it doesn't expose the pause and
resume interface. We have a RawReader pool that cached a lot of RawReaders, and
when the Pulsar broker restarts or the topic is unloaded, the Pulsar client
will reconnect to the broker and prefetch messages from the Pulsar broker,
making the RawReader pool run out of memory and bring heavy on the Pulsar
broker especially when the data has been offloaded to the tiered storage.
### Modifications
Expose the pause and resume interface for RawReader to avoid prefetch
messages when Pulsar broker restart or topic unload.
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### Verifying this change
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This change is a trivial rework / code cleanup without any test coverage.
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This change added tests and can be verified as follows:
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- *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:
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- [ ] Dependencies (add or upgrade a dependency)
- [ ] The public API
- [ ] The schema
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- [ ] The threading model
- [ ] The binary protocol
- [ ] The REST endpoints
- [ ] The admin CLI options
- [ ] The metrics
- [ ] Anything that affects deployment
### Documentation
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