XComp opened a new pull request, #21867:
URL: https://github.com/apache/flink/pull/21867
## What is the purpose of the change
We experienced a test failure where the fatal error was not caused by the
injected expected exception but a `ConnectionLossException`. The connection was
lost because the `fsync` operation done by ZooKeeper took longer (29858ms) than
the specified session timeout (20000ms).
The `ConnectionLossException` can be still considered a fatal error and,
therefore, is actually not indicating an unexpected behavior. The exception was
properly forwarded to the error handler. We should allow this error to happen
here.
## Brief change log
The test excepts `ConnectionLossExceptions` besides the test-internal
expected exception.
## Verifying this change
I added a `testingServer.stop();` before running the assert to simulate the
connection loss verifying that the exception is handled properly by the test.
## 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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