dianfu opened a new pull request #12469:
URL: https://github.com/apache/flink/pull/12469
## What is the purpose of the change
*This pull request improves the exception message when instantiating
non-existing Java class.
It reports the following error before this PR:
TypeError: 'JavaPackage' object is not callable
It will report the following error after this PR:
TypeError: Could not found the Java class 'ElasticSearch'. The Java
dependencies could be specified via command line argument '--jarfile' or the
config option 'pipeline.jars'
*
## Brief change log
- *Hook the method py4j.java_gateway.JavaPackage.__call__ to improve the
exception message*
## Verifying this change
Verified manually.
## 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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