[GitHub] [flink] zhuzhurk opened a new pull request #8851: [FLINK-12876] [runtime] Add an adapter of region failover NG for legacy scheduler

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

zhuzhurk opened a new pull request #8851: [FLINK-12876] [runtime] Add an adapter of region failover NG for legacy scheduler
URL: https://github.com/apache/flink/pull/8851
 
 
   
   ## What is the purpose of the change
   
   *This PR adds an adapter to adapt flip1.RestartPipelinedRegionStrategy for legacy scheduler, so that the legacy scheduler can support fine grained recovery.*
   
   
   ## Brief change log
   
     - *An adapter of flip1.RestartPipelinedRegionStrategy. It implements interfaces of the old FailoverStrategy to support the legacy scheduler.*
     - *A vertex versioner from Gary to maintain vertex versions. This helps to deal with concurrent region failovers.*
    - *A scheduling util that implements similar scheduling logic to ExecutionGraph for failover purposes.*
   
   
   ## Verifying this change
   
   *(Please pick either of the following options)*
   
   This change added tests and can be verified as follows:
   
     - *Tests for strategy loading and building*
     - *Tests for basic failover handling*
     - *Tests for concurrent failovers handling*
   
   ## 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: (yes)
     - The S3 file system connector: (no)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (no)
     - If yes, how is the feature documented? (not documented yet)
   

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