vancior98 opened a new pull request, #24759:
URL: https://github.com/apache/flink/pull/24759

   
   ## What is the purpose of the change
   
   This PR makes REST server ignoring unknown fields when deserializing request 
body, which is helpful in some senarios where a centralized REST client of 
newer version (contains additional fields in request) communicates with REST 
servers of various versions, potentially an old version that doesn't recognize 
additional fields.
   
   Related to #23930 , in which compatibility between old version client and 
new version server was solved.
   
   ## Brief change log
   
   - change ObjectMapper for AbstractHandler to flexible ObjectMapper ignoring 
unknown fields
   
   ## Verifying this change
   
   
   This change added tests and can be verified as follows:
   - unit test AbstractHandlerTest#testIgnoringUnknownFields
   
   ## 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, Kubernetes/Yarn, 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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