gyfora opened a new pull request, #320:
URL: https://github.com/apache/flink-kubernetes-operator/pull/320
## What is the purpose of the change
Fix a few smaller bugs/issues with the JOSDK metrics reporting logic that
was added recently.
## Brief change log
- *Use correct class for FlinkSessionJobController to avoid nullpointer
exception*
- *Avoid creating metric groups again and again for counters and
histograms*
- *Remove unnecessary synchronization for built in histogram*
## Verifying this change
This change is already covered by existing 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 changes to the `CustomResourceDescriptors`:
no
- Core observer or reconciler logic that is regularly executed: no
## Documentation
- Does this pull request introduce a new feature? no
- If yes, how is the feature documented? not applicable
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