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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