AdaptiveSchedulerTest.testStatusMetrics times out

Sep 15 02:28:22 "ForkJoinPool-495-worker-25" #9352 daemon prio=5 os_prio=0 tid=0x00007fcdde409000 nid=0x77f4 waiting on condition [0x00007fcd5c52c000]
Sep 15 02:28:22    java.lang.Thread.State: WAITING (parking)
Sep 15 02:28:22 	at sun.misc.Unsafe.park(Native Method)
Sep 15 02:28:22 	- parking to wait for  <0x00000000f8d7d0b8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
Sep 15 02:28:22 	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
Sep 15 02:28:22 	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
Sep 15 02:28:22 	at java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:403)
Sep 15 02:28:22 	at org.apache.flink.runtime.scheduler.adaptive.AdaptiveSchedulerTest$SubmissionBufferingTaskManagerGateway.waitForSubmissions(AdaptiveSchedulerTest.java:2593)
Sep 15 02:28:22 	at org.apache.flink.runtime.scheduler.adaptive.AdaptiveSchedulerTest.testStatusMetrics(AdaptiveSchedulerTest.java:732)