Github user yanghua commented on the issue:

    https://github.com/apache/flink/pull/6092
  
    hi @tillrohrmann there is a little difference between `RandomUtils.nextLong 
` and `ThreadLocalRandom.current().nextLong` , that is the former allows 
**startInclusive = endExclusive** but the latter does not allow. However, in 
CheckpointCoordinator  exists : 
    
    ```
                if (baseInterval < minPauseBetweenCheckpoints) {
                        baseInterval = minPauseBetweenCheckpoints;
                }
    ```
    
    so Travis-CI test failed. 


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