GitHub user greghogan opened a pull request:
https://github.com/apache/flink/pull/5044
[FLINK-8126] [build] Fix and update checkstyle
## What is the purpose of the change
Update to the latest checkstyle version and fix the errors not previously
detected.
## Brief change log
- update checkstyle to version 8.4 from version 6.19
- in `checkstyle.xml` move `SuppressionCommentFilter` under `TreeWalker`
and remove `FileContentsHolder` (see checkstyle/checkstyle pr4714)
- correct latent checkstyle errors
## Verifying this change
This change is a trivial rework / code cleanup without any test coverage.
## 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, 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)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/greghogan/flink 8126_update_and_fix_checkstyle
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5044.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 #5044
----
commit 3a01732d4e823f732f5fa4b63054b4b8f9e40f3e
Author: Greg Hogan <[email protected]>
Date: 2017-11-21T19:05:53Z
[FLINK-8126] [build] Fix and update checkstyle
Update to the latest checkstyle version and fix the errors not
previously detected.
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