Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/2541
Code looks good, but the build detected a break in binary compatibility.
Have a look at the Travis logs.
Changing the `createLocalEnvironment` to use an additional parameter with
default value broke the compatibility. The fix would be to have an extra method
(and no default parameter value), not change the existing method.
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