gaborgsomogyi opened a new pull request, #21288:
URL: https://github.com/apache/flink/pull/21288
## What is the purpose of the change
Kafka creation/deletion is an async operation. The API gives back future(s)
which must be waited in order to be on the safe side. Additionally the APIs can
throw exceptions while waiting to finish. In this PR I've added a more or less
consistent Kafka topic creation/deletion behavior to the tests. Namely future
wait to all the places where it was missing. This may or may not fix the issue
(Kafka itself can be buggy) but I'm pretty sure w/o consistent topic
creation/deletion API usage we're in trouble.
## Brief change log
* Wait for Kafka topic creation/deletion.
* Add random to test topic names
## Verifying this change
Existing unit tests.
## 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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