SinBex opened a new pull request, #24087:
URL: https://github.com/apache/flink/pull/24087
## What is the purpose of the change
Currently, for JobVertices without parallelism configured, the
AdaptiveBatchScheduler dynamically infers the vertex parallelism based on the
volume of input data. Specifically, for Source vertices, it uses the value of
`execution.batch.adaptive.auto-parallelism.default-source-parallelism` as the
fixed parallelism. If this is not set by the user, the default value of 1 is
used as the source parallelism, which is actually a temporary implementation
solution.
We aim to support dynamic source parallelism inference for batch jobs
## Brief change log
- *Lazily initialize the parallelism of the OperatorCoordinator.*
- *Add the `DynamicParallelismInference` and `DynamicFilteringInfo`
interfaces, and enable the `SourceCoordinator` to invoke corresponding methods
for dynamic parallelism inference.*
- *The `AdaptiveBatchScheduler` applies dynamic source parallelism
inference, and to avoid blocking the main thread by calling external systems,
we have transformed the scheduling process to be asynchronous.*
## Verifying this change
This change added tests and can be verified as follows:
- *Added integration tests to verify the end-to-end logic of dynamic
parallelism inference, see
`AdaptiveBatchSchedulerITCase#testSchedulingWithDynamicSourceParallelismInference`
for details.*
- *Added unit tests for the newly added methods in classes such as
`SourceCoordinator` and `AdaptiveBatchScheduler`.*
- *Manually verified the feature on a Flink session cluster (1 JobManager,
77 TaskManagers), including dynamic inference of parallelism, asynchronous
scheduling, and execution exceptions in `DynamicParallelismInference`, all
performing as expected.*
## 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, Kubernetes/Yarn, ZooKeeper: (yes)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (yes)
- If yes, how is the feature documented? (docs / JavaDocs)
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