[GitHub] sunhaibotb opened a new pull request #7403: [FLINK-11256] Replace the reference of StreamNode object with ID in S…

[GitBox <gi...@apache.org>]

sunhaibotb opened a new pull request #7403: [FLINK-11256] Replace the reference of StreamNode object with ID in S…
URL: https://github.com/apache/flink/pull/7403
 
 
   ## What is the purpose of the change
   
   This pull request replaces the reference of StreamNode object with ID in StreamEdge to reduce the sizes of JobGraph and TDD.  Those referenced objects including sourceVertex and targetVertex will be written transitively on serializing StreamEdge, but they are not needed in JM and Task. For a large size topology, this will causes JobGraph and TDD to become much larger than that actually need, and more likely to occur rpc timeout when transmitted.
   
   
   ## Brief change log
   
     - Replaces the reference of StreamNode object with ID in StreamEdge
     - Migrates methods getSourceVertex() and getTargetVertex() in StreamEdge to StreamGraph 
   
   ## Verifying this change
   
   This change is already covered by existing tests, such as StreamGraphGeneratorTest, StreamingJobGraphGeneratorTest, etc.
   
   ## 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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