rkhachatryan opened a new pull request #10847: [FLINK-15578][connectors/jdbc] 
JDBC exactly once sink
URL: https://github.com/apache/flink/pull/10847
 
 
   ## What is the purpose of the change
   
   Implement JDBC sink with exactly once semantics.
   ExistingTwoPhaseCommitFunction is not currently used (considering to use).
   
   
   ## Brief change log
   
     - *use XA transactions to provide exactly once guarantees*
     - *expose existing JDBC sinks to achieve consistency of public API*
   
   
   ## Verifying this change
   
   This change added tests and can be verified as follows:
   
     - *Added end-to-end test for happy flow (derby db)*
     - *Added integration tests for varous failure scenarios (derby, h2)*
     - *Added unit tests*
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies: add h2 and flink-streamin-java in test scope of flink-jdbc
     - The public API, i.e., is any changed class annotated with 
`@Public(Evolving)`: yes
     - The serializers: yes (XID)
     - The runtime per-record code paths (performance sensitive): yes (for 
records going through the sink)
     - 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? yes
     - If yes, how is the feature documented? docs , JavaDocs
   

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