GJL opened a new pull request #12210:
URL: https://github.com/apache/flink/pull/12210
## What is the purpose of the change
*This catches and logs exceptions thrown when invoking jstack. jstack can
fail if the JVM process that we want to sample exits while or before we invoke
jstack. Since this is not unexpected behavior, we should not propagate the
exception and fail the test prematurely.*
## Brief change log
- *See commit*
## Verifying this change
This change is already covered by existing tests, such as *flink-jepsen*.
## 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/Mesos, 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**)
- If yes, how is the feature documented? (**not applicable** / docs /
JavaDocs / not documented)
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