ThreadLeakError: 1 thread leaked from SUITE scope at org.apache.solr.search.join.BlockJoinFacetDistribTest

WARN  (jetty-closer-2-thread-2) [    ] o.e.j.u.t.QueuedThreadPool QueuedThreadPool@qtp860938026{STOPPING,8<=9<=10000,i=0,q=1} Couldn't stop Thread[qtp860938

 2> Feb 23, 2018 11:20:41 PM com.carrotsearch.randomizedtesting.ThreadLeakControl checkThreadLeaks
  2> SEVERE: 1 thread leaked from SUITE scope at org.apache.solr.search.join.BlockJoinFacetDistribTest: 
  2>    1) Thread[id=76, name=qtp860938026-76, state=TIMED_WAITING, group=TGRP-BlockJoinFacetDistribTest]
  2>         at sun.misc.Unsafe.park(Native Method)
  2>         at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
  2>         at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2163)
  2>         at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.reservedWait(ReservedThreadExecutor.java:308)
  2>         at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:373)
  2>         at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:708)
  2>         at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
  2>         at java.lang.Thread.run(Thread.java:745)

  2> SEVERE: There are still zombie threads that couldn't be terminated:
  2>    1) Thread[id=76, name=qtp860938026-76, state=TIMED_WAITING, group=TGRP-BlockJoinFacetDistribTest]
  2>         at sun.misc.Unsafe.park(Native Method)
  2>         at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
...
[23:19:41.186] ERROR   0.00s | BlockJoinFacetDistribTest (suite) <<<
   > Throwable #1: com.carrotsearch.randomizedtesting.ThreadLeakError: 1 thread leaked from SUITE scope at org.apache.solr.search.join.BlockJoinFacetDistribTest: 
   >    1) Thread[id=76, name=qtp860938026-76, state=TIMED_WAITING, group=TGRP-BlockJoinFacetDistribTest]
   >         at sun.misc.Unsafe.park(Native Method)
   >         at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
   >         at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2163)
   >         at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.reservedWait(ReservedThreadExecutor.java:308)