[GitHub] [flink] zhijiangW opened a new pull request #8509: [FLINK-12458][network] Introduce PartitionConnectionException for unreachable producer

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

zhijiangW opened a new pull request #8509: [FLINK-12458][network] Introduce PartitionConnectionException for unreachable producer
URL: https://github.com/apache/flink/pull/8509
 
 
   ## What is the purpose of the change
   
   * If the consumer can not establish a connection to remote task executor while requesting remote subpartition, which might indicate the remote task executor is not reachable. We could wrap this connection exception into new proposed `PartitionConnectionException` which also extends `PartitionException`, then the job master would decide whether to restart the upstream region to re-producer partition data.*
   
   ## Brief change log
   
     - *Introduce new `PartitionConnectionException` extends `PartitionException.*
     - *Wrap any exceptions into `PartitionConnectionException` while creating partition request client during `RemoteInputChannel#requestSubpartition`*
   
   ## Verifying this change
   
     - *Added new tests in `RemoteInputChannelTest` for verifying the `PartitionConnectionException` while requesting sub partition.*
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes / **no**)
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**)
     - The serializers: (yes / **no** / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know)
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: (yes / **no** / don't know)
     - The S3 file system connector: (yes / **no** / don't know)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes / **no**)
     - If yes, how is the feature documented? (**not applicable** / docs / JavaDocs / not documented)
   

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