Java stack information for the threads listed above:
===================================================
"AtmostOneTaskExecutor[hudson.model.Queue$1@6a0918b1] [#13]":
  at sun.misc.Unsafe.park(Native Method)
  - parking to wait for  <0x00000007dccc7200> (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:964)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1282)
  at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:731)
  at hudson.model.Executor.isParking(Executor.java:609)
  at hudson.model.Queue.maintain(Queue.java:1277)
  at hudson.model.Queue$1.call(Queue.java:334)
  at hudson.model.Queue$1.call(Queue.java:331)
  at jenkins.util.AtmostOneTaskExecutor$1.call(AtmostOneTaskExecutor.java:101)
  at jenkins.util.AtmostOneTaskExecutor$1.call(AtmostOneTaskExecutor.java:91)
  at java.util.concurrent.FutureTask.run(FutureTask.java:262)
  at hudson.remoting.AtmostOneThreadExecutor$Worker.run(AtmostOneThreadExecutor.java:110)
  at java.lang.Thread.run(Thread.java:745)
"Executing testConcurrentBuild(hudson.matrix.MatrixProjectTest)":
  at sun.misc.Unsafe.park(Native Method)
  - parking to wait for  <0x00000007d7bdd660> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
  at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
  at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
  at hudson.model.Queue._withLock(Queue.java:1205)
  at hudson.model.Queue.withLock(Queue.java:1143)
  at hudson.model.Computer.removeExecutor(Computer.java:977)
  at hudson.model.Executor.interrupt(Executor.java:187)
  at hudson.model.Executor.interrupt(Executor.java:164)
  at hudson.model.Executor.interruptForShutdown(Executor.java:149)
  at hudson.model.Computer.interrupt(Computer.java:1014)
  at jenkins.model.Jenkins.cleanUp(Jenkins.java:2769)
  at org.jvnet.hudson.test.JenkinsRule.after(JenkinsRule.java:460)
  at org.jvnet.hudson.test.JenkinsRule$2.evaluate(JenkinsRule.java:526)
  at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
  at org.junit.rules.RunRules.evaluate(RunRules.java:20)
  at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
  at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
  at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
  at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
  at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
  at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
  at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
  at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264)
  at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
  at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
  at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
  at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
  at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)

Found 1 deadlock.