Sometimes the HotRod client test suite hangs at the end.
Almost all of the live threads are client worker threads or server threads, the only test method running after a while is ClientConnectionPoolingTest.tearDown:

java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)

• parking to wait for <0x765e2148> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
  at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:226)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2081)
  at java.util.concurrent.ThreadPoolExecutor.awaitTermination(ThreadPoolExecutor.java:1425)
  at org.jboss.netty.util.internal.ExecutorUtil.terminate(ExecutorUtil.java:87)
  at org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory.releaseExternalResources(NioServerSocketChannelFactory.java:146)
  at org.infinispan.server.core.transport.netty.NettyTransport.stop(NettyTransport.scala:117)
  at org.infinispan.server.core.AbstractProtocolServer.stop(AbstractProtocolServer.scala:96)
  at org.infinispan.server.hotrod.HotRodServer.stop(HotRodServer.scala:169)
  at org.infinispan.client.hotrod.ClientConnectionPoolingTest.tearDown(ClientConnectionPoolingTest.java:103)