JingGe opened a new pull request #18070:
URL: https://github.com/apache/flink/pull/18070
## What is the purpose of the change
there are multiple failing tests during CI only happened for `hbase2`. The
potential reason might be some race conditions while running the CI on azure.
This PR adds some additional checks and explicitly method calls to make sure
the result has been fetched before doing the assertions. Local checks haven
been done multiple times and none failing test happened.
## Brief change log
- add check of row count after insert
- use `MiniClusterWithClientResource` as a `ClassRule`
## Verifying this change
This change is a trivial rework / test case improvement.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (yes / **no**)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (yes / **no**)
- The serializers: (yes / **no** / don't know)
- The runtime per-record code paths (performance sensitive): (yes / **no**
/ don't know)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / **no** / don't
know)
- The S3 file system connector: (yes / **no** / don't know)
## Documentation
- Does this pull request introduce a new feature? (yes / **no**)
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