[GitHub] [pulsar] thetumbled opened a new pull request, #18679: [fix][broker] transactional producer created failed due to read snapshot blocked.

[GitBox]

thetumbled opened a new pull request, #18679:
URL: https://github.com/apache/pulsar/pull/18679

   <!-- Either this PR fixes an issue, -->
   Fixes #17040
   
   ### Motivation
   Transaction buffer snapshot will be read to initailize transaction buffer. 
   
`org.apache.pulsar.broker.transaction.buffer.impl.SingleSnapshotAbortedTxnProcessorImpl#recoverFromSnapshot`
   <img width="535" alt="企业微信截图_830996e7-2c6e-4cc6-a062-f0ab47680dc0" 
src="https://user-images.githubusercontent.com/52550727/204694530-e7713e11-90c3-4487-8ed3-c2bc638fe9fa.png";>
   <img width="492" alt="image" 
src="https://user-images.githubusercontent.com/52550727/204694693-9f331ab6-fb8b-47c3-8e9a-da99b735f3c9.png";>
   <img width="632" alt="企业微信截图_7be78b60-bdd2-4778-aafa-2093fb970b0c" 
src="https://user-images.githubusercontent.com/52550727/204694647-3d11567d-4673-4dc7-be18-9329d2e65a12.png";>
   
   While `reader.hasMessageAvailable` do not guarantee that a subsequent call 
to `readNext()` will not block, which will result into that transaction buffer 
can't be initialized successfully. 
   
   
   ### Modifications
   use `readNextAsync` instead of `readNext`, and wait for result with timeout. 
   
   ### Verifying this change
   
   - [ ] Make sure that the change passes the CI checks.
   
   This change is a trivial rework / code cleanup without any test coverage.
   
   ### Does this pull request potentially affect one of the following parts:
   
   *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
   - [ ] Anything that affects deployment
   
   ### Documentation
   
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   - [ ] `doc` <!-- Your PR contains doc changes. Please attach the local 
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   - [ ] `doc-required` <!-- Your PR changes impact docs and you will update 
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   - [ ] `doc-not-needed` <!-- Your PR changes do not impact docs -->
   - [ ] `doc-complete` <!-- Docs have been already added -->
   
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   PR in forked repository: <!-- ENTER URL HERE -->
   
   


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