gaoyunhaii opened a new pull request, #20497:
URL: https://github.com/apache/flink/pull/20497
## What is the purpose of the change
This PR forces the output edges of DynamicFilteringDataCollector to be
blocking, thus ensures the task finished before the fact source get scheduled.
This is done by inserts the BatchExecExchange between all the output edges
from BatchExecDynamicFilteringDataCollector and its precedent tasks. Note that
currently once two tasks are connected via pipeline regions, it would be
divided into the same region and the blocking edge would not work, thus we have
to make all the parents' output edges to be blocking.
## Brief change log
- e57d925f6f4c4970004bb28f9e1b506869aabc9c does the above change.
## Verifying this change
This change added tests and can be verified as follows:
- Added tests that are BatchExecExchange is inserted correctly.
- Added ITCases to demonstrate the blocking edge works correctly.
## 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, Kubernetes/Yarn, ZooKeeper: **no**
- The S3 file system connector: **no**
## Documentation
- Does this pull request introduce a new feature? **no**
- If yes, how is the feature documented? **not applicable**
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