dianfu opened a new pull request #12488:
URL: https://github.com/apache/flink/pull/12488
## What is the purpose of the change
*The implementation of method `exception` and `set_exception` are not
correct. The purpose of the Python CompletableFuture is to hole the results
from the Java CompletableFuture. We should expose the exception inside the Java
CompletableFuture to users instead of allow Python users set the exception.*
## Brief change log
- *Throw exception for the method set_result and set_exception*
- *Return the exception reported in the Java CompletableFuture for the
method exception*
## Verifying this change
Verified mannully.
## 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/Mesos, 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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