Github user rmetzger commented on the pull request:
https://github.com/apache/flink/pull/658#issuecomment-100129770
Thank you for this pull request. I'll review it now.
The first thing I saw is that the build has failed:
```
[INFO]
------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 10.728 s
[INFO] Finished at: 2015-05-07T12:08:03+00:00
[INFO] Final Memory: 25M/448M
[INFO]
------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.rat:apache-rat-plugin:0.11:check
(default) on project flink-parent: Too many files with unapproved license: 1
See RAT report in: /home/travis/build/apache/flink/target/rat.txt -> [Help 1]
```
https://travis-ci.org/apache/flink/jobs/61608003
You can also do a local `mvn clean install -DskipTests` to run the rat
plugin.
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