Java pre-commit stability

[Jan Lukavský]

Hi,

I'm experiencing failures in java precommit checks. Last three failures 
(unrelated to PR) I've seen were:

 - 
org.apache.beam.runners.flink.translation.wrappers.streaming.io.UnboundedSourceWrapperTest$ParameterizedUnboundedSourceWrapperTest.testWatermarkEmission[numTasks 
= 2; numSplits=2]

  (org.junit.runners.model.TestTimedOutException: test timed out after 
30000 milliseconds)

 - 
org.apache.beam.sdk.transforms.WatchTest.testMultiplePollsWithManyResults

  (java.lang.AssertionError: Drop timestamped 
input/Values/Map/ParMultiDo(Anonymous).output: Outputs must be in 
timestamp order)

 - 
org.apache.beam.runners.flink.translation.wrappers.streaming.io.UnboundedSourceWrapperTest$ParameterizedUnboundedSourceWrapperTest.testWatermarkEmission[numTasks 
= 1; numSplits=1]

  (org.junit.runners.model.TestTimedOutException: test timed out after 
30000 milliseconds)

This might be somewhat related to infrastructure (although probably 
signals that these tests are flaky), is anyone else experiencing this?

 Jan