Github user tillrohrmann commented on the pull request:
https://github.com/apache/flink/pull/1143#issuecomment-141416101
I really tried hard to reproduce the failing test case
`ZooKeeperLeaderElectionTest.testMultipleLeaders` but it was really hard. I
think the test case fails because of too much load on Travis. Therefore, I
tried to reduce the resources used by the `ZooKeeperLeaderElectionTest` and
increased the timeouts in order to mitigate the problem.
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