GitHub user zentol opened a pull request:
https://github.com/apache/flink/pull/4908
[FLINK-7933][metrics] Improve PrometheusReporter tests
## What is the purpose of the change
This PR resolves the test instabilities of the prometheus reporter.
## Brief change log
* use a port range instead of a single hard-coded port
* required the exposure of the bound port by the reporter
* move registry/reporter initialization into an `@Before` method
(guarantees execution order)
* shutdown registry in `PrometheusReporterTest`
## 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 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, Yarn/Mesos, ZooKeeper: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not applicable)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zentol/flink 7933
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4908.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4908
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commit 36168084423f704d8fb2647acf8dda2a09e4ee1d
Author: zentol <ches...@apache.org>
Date: 2017-10-26T17:04:30Z
[FLINK-7933][metrics] Improve PrometheusReporter tests
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