Github user gaborhermann commented on the pull request:
https://github.com/apache/flink/pull/433#issuecomment-75928922
Sorry, I accidentally used a class only available in Java 8, and did not
wait for the Travis build.
I fixed it. Travis still fails, but on an unrelated issue (see
https://travis-ci.org/apache/flink/jobs/52101969).
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