kezhuw opened a new pull request #14361:
URL: https://github.com/apache/flink/pull/14361
## What is the purpose of the change
Fix deadlock when loading different driver classes concurrently using
`Class.forName`.
## Brief change log
- Add hang test case to reveal deadlock when loading different sql driver
classes concurrently using Class.forName.
- Fix deadlock when loading different sql driver classes concurrently using
Class.forName.
## Verifying this change
This change added tests and can be verified as follows:
- Add test
`SimpleJdbcConnectionProviderDriverClassConcurrentLoadingTest#testDriverClassConcurrentLoading`.
## 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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