[GitHub] [flink] ifndef-SleePy opened a new pull request #8946: [FLINK-13042][datastream] Make slot sharing configurable on StreamExecutionEnvironment

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

ifndef-SleePy opened a new pull request #8946: [FLINK-13042][datastream] Make slot sharing configurable on StreamExecutionEnvironment
URL: https://github.com/apache/flink/pull/8946
 
 
   ## What is the purpose of the change
   
   * There is a requirement of Blink batch planner that providing a global setting that disabling slot sharing. To support that, will expose a `PublicEvolving` method on `StreamExecutionEnvironment` to globally disable slot sharing.
   
   * Note that, this method might be removed if there is a better approach to satisfy Blink batch planner in the future.
   
   * There is a discussion under https://github.com/apache/flink/pull/8931 at the moment
   * **This PR should not go forward until there is an agreement reached**
   
   ## Brief change log
   
   * Add a `PublicEvolving` method on `StreamExecutionEnvironment` to enable/disable slot sharing
   
   ## Verifying this change
   
   * Added integration tests to verify slot sharing behavior
   
   ## 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)`: **yes**
     - 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? **yes** maybe
     - If yes, how is the feature documented? **docs & JavaDocs**
   

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