Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/2601
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GitHub user greghogan opened a pull request:
https://github.com/apache/flink/pull/2601
[FLINK-4736] [core] Don't duplicate fields in Ordering
Duplicate fields should not be appended to an ordering. In an ordering each
subsequent field is only used as a comparison when all prior
