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Subject [GitHub] StefanRRichter opened a new pull request #7010: [FLINK-10353][kafka] Support change of transactional semantics in Kaf…
Date Fri, 02 Nov 2018 17:13:28 GMT
StefanRRichter opened a new pull request #7010: [FLINK-10353][kafka] Support change of transactional
semantics in Kaf…
URL: https://github.com/apache/flink/pull/7010
 
 
   …ka Producer with existing state
   
   ## What is the purpose of the change
   
   This PR changes `FlinkKafkaProducer` and  `FlinkKafkaProducer011` to support a change of
transactional semantics when restoring from existing state, e.g. a savepoint.
   
   ## Brief change log
   
   - Introduced `KafkaTransactionState#isTransactional` to distinguish which transactional
handling should be applied instead of relying on what is currently configured.
   
   - Call `initializeUserContext` in `TwoPhaseCommitSinkFunction` for all cases that did not
recover a user context.
   
   - Consider removing tranactional id from the properties when creating a new producer to
deactivate transactional semantics if no longer required.
   
   
   ## Verifying this change
   
   Added `FlinkKafkaProducer(11)ITCase#testMigrateFromAtLeastOnceToExactlyOnce` and `#testMigrateFromAtExactlyOnceToAtLeastOnce`
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (no)
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no)
     - The serializers: (no)
     - The runtime per-record code paths (performance sensitive): (no)
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing,
Yarn/Mesos, ZooKeeper: (no)
     - The S3 file system connector: (no)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (no)
     - If yes, how is the feature documented? (not applicable)
   

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