[GitHub] [flink] 1u0 opened a new pull request #9735: [FLINK-14156][runtime] Submit timer trigger letters to task's mailbox with operator's precedence

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

1u0 opened a new pull request #9735: [FLINK-14156][runtime] Submit timer trigger letters to task's mailbox with operator's precedence
URL: https://github.com/apache/flink/pull/9735
 
 
   ## What is the purpose of the change
   
   This change submits `StreamTask`'s timer trigger mailbox action with the priority of the operator that the trigger originate from. This should allow chaining multiple operators that use `mailboxExecutor.yield()` internally.
   
   ## Brief change log
   
     - set once and access `ProcessingTimeService` instance at operator level (a new field in `AbstractStreamOperator`);
     - instantiate `ProcessingTimeService` instance with mailbox executor using operator precedence .
   
   ## Verifying this change
   
   All existing tests should pass. This change needs to add more tests.
   
   ## 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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