[JENKINS] Lucene-Solr-Tests-7.x - Build # 256 - Still Unstable

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Build: https://builds.apache.org/job/Lucene-Solr-Tests-7.x/256/

15 tests failed.
FAILED:  org.apache.solr.cloud.OverseerRolesTest.testOverseerRole

Error Message:
The old leader should have rejoined election

Stack Trace:
java.lang.AssertionError: The old leader should have rejoined election
        at 
__randomizedtesting.SeedInfo.seed([1F86FE999C07DB6B:FE4D030DA7B4EDBA]:0)
        at org.junit.Assert.fail(Assert.java:93)
        at org.junit.Assert.assertTrue(Assert.java:43)
        at 
org.apache.solr.cloud.OverseerRolesTest.testOverseerRole(OverseerRolesTest.java:145)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1737)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:934)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:970)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:984)
        at 
com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:817)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:468)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:943)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:829)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:879)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:890)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
        at java.lang.Thread.run(Thread.java:748)


FAILED:  junit.framework.TestSuite.org.apache.solr.cloud.UnloadDistributedZkTest

Error Message:
63 threads leaked from SUITE scope at 
org.apache.solr.cloud.UnloadDistributedZkTest:     1) Thread[id=15511, 
name=coreZkRegister-4822-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    2) Thread[id=15521, 
name=searcherExecutor-4848-thread-1, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    3) Thread[id=15482, 
name=zkCallback-3291-thread-2, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    4) Thread[id=15512, 
name=ScheduledTrigger-4841-thread-1, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]         at java.lang.Object.wait(Native 
Method)         at java.lang.Object.wait(Object.java:502)         at 
org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1406)         at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1097)         at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
         at 
org.apache.solr.common.cloud.SolrZkClient$$Lambda$207/1161373544.execute(Unknown
 Source)         at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
         at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)         
at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
         at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)   
      at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
         at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)         
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)         at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    5) Thread[id=15448, 
name=watches-3286-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    6) Thread[id=15507, 
name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at java.lang.Thread.sleep(Native 
Method)         at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
         at java.lang.Thread.run(Thread.java:748)    7) Thread[id=15459, 
name=qtp8772792-15459, state=TIMED_WAITING, group=TGRP-UnloadDistributedZkTest] 
        at sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)     
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626) 
        at java.lang.Thread.run(Thread.java:748)    8) Thread[id=15473, 
name=Thread-3356, state=WAITING, group=TGRP-UnloadDistributedZkTest]         at 
java.lang.Object.wait(Native Method)         at 
java.lang.Object.wait(Object.java:502)         at 
org.apache.solr.core.CloserThread.run(CoreContainer.java:1717)    9) 
Thread[id=15457, name=qtp8772792-15457, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)     
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626) 
        at java.lang.Thread.run(Thread.java:748)   10) Thread[id=15519, 
name=ScheduledTrigger-4841-thread-4, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1088)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   11) Thread[id=15450, 
name=searcherExecutor-4828-thread-1, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   12) Thread[id=15475, 
name=Scheduler-1184856621, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   13) Thread[id=15428, 
name=qtp1749021917-15428, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)     
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626) 
        at java.lang.Thread.run(Thread.java:748)   14) Thread[id=15515, 
name=ScheduledTrigger-4841-thread-2, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1088)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   15) Thread[id=15453, 
name=qtp8772792-15453, state=RUNNABLE, group=TGRP-UnloadDistributedZkTest]      
   at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)         at 
sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)         at 
sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)         at 
sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)         at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.select(ManagedSelector.java:243)
         at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:191)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:249)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) 
        at java.lang.Thread.run(Thread.java:748)   16) Thread[id=15436, 
name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at java.lang.Thread.sleep(Native 
Method)         at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
         at java.lang.Thread.run(Thread.java:748)   17) Thread[id=15452, 
name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at java.lang.Thread.sleep(Native 
Method)         at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
         at java.lang.Thread.run(Thread.java:748)   18) Thread[id=15496, 
name=zkCallback-3291-thread-2-processing-n:127.0.0.1:43594_-EventThread, 
state=WAITING, group=TGRP-UnloadDistributedZkTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:501)   
19) Thread[id=15435, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at java.lang.Thread.sleep(Native 
Method)         at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
         at java.lang.Thread.run(Thread.java:748)   20) Thread[id=15485, 
name=zkCallback-3285-thread-2, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   21) Thread[id=15465, 
name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at java.lang.Thread.sleep(Native 
Method)         at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
         at java.lang.Thread.run(Thread.java:748)   22) Thread[id=15460, 
name=qtp8772792-15460, state=TIMED_WAITING, group=TGRP-UnloadDistributedZkTest] 
        at sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)     
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626) 
        at java.lang.Thread.run(Thread.java:748)   23) Thread[id=15510, 
name=OverseerThreadFactory-4843-thread-1, state=WAITING, group=Overseer 
collection creation process.]         at sun.misc.Unsafe.park(Native Method)    
     at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)       
  at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:458)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.take(SynchronousQueue.java:924)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   24) Thread[id=15509, 
name=coreZkRegister-4833-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   25) Thread[id=15430, 
name=qtp1749021917-15430, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)     
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626) 
        at java.lang.Thread.run(Thread.java:748)   26) Thread[id=15454, 
name=qtp8772792-15454, state=RUNNABLE, group=TGRP-UnloadDistributedZkTest]      
   at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)         at 
sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)         at 
sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)         at 
sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)         at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.select(ManagedSelector.java:243)
         at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:191)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:249)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) 
        at java.lang.Thread.run(Thread.java:748)   27) Thread[id=15518, 
name=ScheduledTrigger-4841-thread-3, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1088)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   28) Thread[id=15492, 
name=zkCallback-3291-thread-6, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   29) Thread[id=15425, 
name=qtp1749021917-15425-acceptor-0@53dc13dd-ServerConnector@354130ff{HTTP/1.1,[http/1.1]}{127.0.0.1:44686},
 state=RUNNABLE, group=TGRP-UnloadDistributedZkTest]         at 
sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)         at 
sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)     
    at 
sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)     
    at 
org.eclipse.jetty.server.ServerConnector.accept(ServerConnector.java:371)       
  at 
org.eclipse.jetty.server.AbstractConnector$Acceptor.run(AbstractConnector.java:601)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) 
        at java.lang.Thread.run(Thread.java:748)   30) Thread[id=15524, 
name=recoveryExecutor-3289-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   31) Thread[id=15483, 
name=zkCallback-3291-thread-3, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   32) Thread[id=15514, 
name=coreZkRegister-4822-thread-2, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   33) Thread[id=15427, 
name=qtp1749021917-15427, state=RUNNABLE, group=TGRP-UnloadDistributedZkTest]   
      at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)         at 
sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)         at 
sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)         at 
sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)         at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.select(ManagedSelector.java:243)
         at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:191)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:249)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) 
        at java.lang.Thread.run(Thread.java:748)   34) Thread[id=15505, 
name=OverseerStateUpdate-99068951044161551-127.0.0.1:44686_-n_0000000003, 
state=TIMED_WAITING, group=Overseer state updater.]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
org.apache.solr.cloud.ZkDistributedQueue.peekElements(ZkDistributedQueue.java:435)
         at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:203)       
  at java.lang.Thread.run(Thread.java:748)   35) Thread[id=15484, 
name=zkCallback-3291-thread-4, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   36) Thread[id=15506, 
name=OverseerCollectionConfigSetProcessor-99068951044161551-127.0.0.1:44686_-n_0000000003,
 state=TIMED_WAITING, group=Overseer collection creation process.]         at 
java.lang.Thread.sleep(Native Method)         at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryDelay(ZkCmdExecutor.java:111)   
      at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:70)
         at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)        
 at 
org.apache.solr.cloud.OverseerTaskProcessor.amILeader(OverseerTaskProcessor.java:387)
         at 
org.apache.solr.cloud.OverseerTaskProcessor.run(OverseerTaskProcessor.java:193) 
        at java.lang.Thread.run(Thread.java:748)   37) Thread[id=15445, 
name=Scheduler-1455035820, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   38) Thread[id=15535, 
name=zkCallback-3285-thread-6, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   39) Thread[id=15536, 
name=zkCallback-3285-thread-7, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   40) Thread[id=15461, 
name=org.eclipse.jetty.server.session.HashSessionManager@a97ab0Timer, 
state=TIMED_WAITING, group=TGRP-UnloadDistributedZkTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   41) Thread[id=15493, 
name=zkCallback-3285-thread-5, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   42) Thread[id=15508, 
name=OverseerAutoScalingTriggerThread-99068951044161551-127.0.0.1:44686_-n_0000000003,
 state=WAITING, group=Overseer autoscaling triggers]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:166)
         at java.lang.Thread.run(Thread.java:748)   43) Thread[id=15466, 
name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at java.lang.Thread.sleep(Native 
Method)         at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
         at java.lang.Thread.run(Thread.java:748)   44) Thread[id=15423, 
name=qtp1749021917-15423, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)     
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626) 
        at java.lang.Thread.run(Thread.java:748)   45) Thread[id=15523, 
name=updateExecutor-3288-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   46) Thread[id=15442, 
name=zkCallback-3285-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   47) Thread[id=15424, 
name=qtp1749021917-15424, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)     
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626) 
        at java.lang.Thread.run(Thread.java:748)   48) Thread[id=15491, 
name=zkCallback-3291-thread-5, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   49) Thread[id=15486, 
name=zkCallback-3285-thread-3, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   50) Thread[id=15455, 
name=qtp8772792-15455-acceptor-0@5d9e1a2b-ServerConnector@16084f1d{HTTP/1.1,[http/1.1]}{127.0.0.1:43594},
 state=RUNNABLE, group=TGRP-UnloadDistributedZkTest]         at 
sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)         at 
sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)     
    at 
sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)     
    at 
org.eclipse.jetty.server.ServerConnector.accept(ServerConnector.java:371)       
  at 
org.eclipse.jetty.server.AbstractConnector$Acceptor.run(AbstractConnector.java:601)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) 
        at java.lang.Thread.run(Thread.java:748)   51) Thread[id=15501, 
name=zkCallback-3285-thread-2-processing-n:127.0.0.1:44686_-SendThread(127.0.0.1:49266),
 state=TIMED_WAITING, group=TGRP-UnloadDistributedZkTest]         at 
java.lang.Thread.sleep(Native Method)         at 
org.apache.zookeeper.client.StaticHostProvider.next(StaticHostProvider.java:101)
         at 
org.apache.zookeeper.ClientCnxn$SendThread.startConnect(ClientCnxn.java:997)    
     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1060)   
52) Thread[id=15517, name=searcherExecutor-4839-thread-1, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   53) Thread[id=15472, 
name=zkCallback-3291-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   54) Thread[id=15478, 
name=watches-3292-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   55) Thread[id=15443, 
name=Thread-3347, state=WAITING, group=TGRP-UnloadDistributedZkTest]         at 
java.lang.Object.wait(Native Method)         at 
java.lang.Object.wait(Object.java:502)         at 
org.apache.solr.core.CloserThread.run(CoreContainer.java:1717)   56) 
Thread[id=15502, 
name=zkCallback-3285-thread-2-processing-n:127.0.0.1:44686_-EventThread, 
state=WAITING, group=TGRP-UnloadDistributedZkTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:501)   
57) Thread[id=15431, 
name=org.eclipse.jetty.server.session.HashSessionManager@67fccac1Timer, 
state=TIMED_WAITING, group=TGRP-UnloadDistributedZkTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
         at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   58) Thread[id=15458, 
name=qtp8772792-15458, state=TIMED_WAITING, group=TGRP-UnloadDistributedZkTest] 
        at sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)     
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626) 
        at java.lang.Thread.run(Thread.java:748)   59) Thread[id=15495, 
name=zkCallback-3291-thread-2-processing-n:127.0.0.1:43594_-SendThread(127.0.0.1:49266),
 state=TIMED_WAITING, group=TGRP-UnloadDistributedZkTest]         at 
java.lang.Thread.sleep(Native Method)         at 
org.apache.zookeeper.client.StaticHostProvider.next(StaticHostProvider.java:101)
         at 
org.apache.zookeeper.ClientCnxn$SendThread.startConnect(ClientCnxn.java:997)    
     at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1060)   
60) Thread[id=15426, name=qtp1749021917-15426, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
         at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)     
    at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626) 
        at java.lang.Thread.run(Thread.java:748)   61) Thread[id=15429, 
name=qtp1749021917-15429, state=RUNNABLE, group=TGRP-UnloadDistributedZkTest]   
      at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)         at 
sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)         at 
sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)         at 
sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)         at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.select(ManagedSelector.java:243)
         at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:191)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:249)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) 
        at java.lang.Thread.run(Thread.java:748)   62) Thread[id=15456, 
name=qtp8772792-15456, state=TIMED_WAITING, group=TGRP-UnloadDistributedZkTest] 
        at java.lang.Object.wait(Native Method)         at 
org.apache.solr.cloud.OverseerTaskQueue$LatchWatcher.await(OverseerTaskQueue.java:149)
         at 
org.apache.solr.cloud.OverseerTaskQueue.offer(OverseerTaskQueue.java:199)       
  at 
org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:300)
         at 
org.apache.solr.handler.admin.CollectionsHandler.invokeAction(CollectionsHandler.java:244)
         at 
org.apache.solr.handler.admin.CollectionsHandler.handleRequestBody(CollectionsHandler.java:222)
         at 
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:177)
         at 
org.apache.solr.servlet.HttpSolrCall.handleAdmin(HttpSolrCall.java:735)         
at 
org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:716)  
       at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:497)      
   at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:382)
         at 
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:326)
         at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759)
         at 
org.apache.solr.client.solrj.embedded.JettySolrRunner$DebugFilter.doFilter(JettySolrRunner.java:139)
         at 
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759)
         at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582)      
   at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:224)
         at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
         at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)       
  at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
         at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
         at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)   
      at 
org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:493)  
       at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134) 
        at org.eclipse.jetty.server.Server.handle(Server.java:534)         at 
org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320)         at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)     
    at 
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283)
         at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:108)   
      at 
org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93) 
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
         at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
         at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) 
        at java.lang.Thread.run(Thread.java:748)   63) Thread[id=15487, 
name=zkCallback-3285-thread-4, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]         at sun.misc.Unsafe.park(Native 
Method)         at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)         
at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
         at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
         at 
java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)         
at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)

Stack Trace:
com.carrotsearch.randomizedtesting.ThreadLeakError: 63 threads leaked from 
SUITE scope at org.apache.solr.cloud.UnloadDistributedZkTest: 
   1) Thread[id=15511, name=coreZkRegister-4822-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   2) Thread[id=15521, name=searcherExecutor-4848-thread-1, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   3) Thread[id=15482, name=zkCallback-3291-thread-2, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   4) Thread[id=15512, name=ScheduledTrigger-4841-thread-1, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:502)
        at org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1406)
        at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1097)
        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
        at 
org.apache.solr.common.cloud.SolrZkClient$$Lambda$207/1161373544.execute(Unknown
 Source)
        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   5) Thread[id=15448, name=watches-3286-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   6) Thread[id=15507, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at java.lang.Thread.sleep(Native Method)
        at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
        at java.lang.Thread.run(Thread.java:748)
   7) Thread[id=15459, name=qtp8772792-15459, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
        at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
        at java.lang.Thread.run(Thread.java:748)
   8) Thread[id=15473, name=Thread-3356, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:502)
        at org.apache.solr.core.CloserThread.run(CoreContainer.java:1717)
   9) Thread[id=15457, name=qtp8772792-15457, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
        at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
        at java.lang.Thread.run(Thread.java:748)
  10) Thread[id=15519, name=ScheduledTrigger-4841-thread-4, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1088)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  11) Thread[id=15450, name=searcherExecutor-4828-thread-1, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  12) Thread[id=15475, name=Scheduler-1184856621, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  13) Thread[id=15428, name=qtp1749021917-15428, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
        at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
        at java.lang.Thread.run(Thread.java:748)
  14) Thread[id=15515, name=ScheduledTrigger-4841-thread-2, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1088)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  15) Thread[id=15453, name=qtp8772792-15453, state=RUNNABLE, 
group=TGRP-UnloadDistributedZkTest]
        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
        at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.select(ManagedSelector.java:243)
        at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:191)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:249)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
        at java.lang.Thread.run(Thread.java:748)
  16) Thread[id=15436, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at java.lang.Thread.sleep(Native Method)
        at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
        at java.lang.Thread.run(Thread.java:748)
  17) Thread[id=15452, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at java.lang.Thread.sleep(Native Method)
        at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
        at java.lang.Thread.run(Thread.java:748)
  18) Thread[id=15496, 
name=zkCallback-3291-thread-2-processing-n:127.0.0.1:43594_-EventThread, 
state=WAITING, group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:501)
  19) Thread[id=15435, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at java.lang.Thread.sleep(Native Method)
        at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
        at java.lang.Thread.run(Thread.java:748)
  20) Thread[id=15485, name=zkCallback-3285-thread-2, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  21) Thread[id=15465, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at java.lang.Thread.sleep(Native Method)
        at 
org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
        at java.lang.Thread.run(Thread.java:748)
  22) Thread[id=15460, name=qtp8772792-15460, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
        at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
        at java.lang.Thread.run(Thread.java:748)
  23) Thread[id=15510, name=OverseerThreadFactory-4843-thread-1, state=WAITING, 
group=Overseer collection creation process.]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:458)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.take(SynchronousQueue.java:924)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  24) Thread[id=15509, name=coreZkRegister-4833-thread-1, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  25) Thread[id=15430, name=qtp1749021917-15430, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
        at 
org.eclipse.jetty.util.BlockingArrayQueue.poll(BlockingArrayQueue.java:392)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.idleJobPoll(QueuedThreadPool.java:563)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.access$800(QueuedThreadPool.java:48)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:626)
        at java.lang.Thread.run(Thread.java:748)
  26) Thread[id=15454, name=qtp8772792-15454, state=RUNNABLE, 
group=TGRP-UnloadDistributedZkTest]
        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
        at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.select(ManagedSelector.java:243)
        at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:191)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:249)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
        at java.lang.Thread.run(Thread.java:748)
  27) Thread[id=15518, name=ScheduledTrigger-4841-thread-3, state=WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1088)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  28) Thread[id=15492, name=zkCallback-3291-thread-6, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  29) Thread[id=15425, 
name=qtp1749021917-15425-acceptor-0@53dc13dd-ServerConnector@354130ff{HTTP/1.1,[http/1.1]}{127.0.0.1:44686},
 state=RUNNABLE, group=TGRP-UnloadDistributedZkTest]
        at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
        at 
sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)
        at 
sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)
        at 
org.eclipse.jetty.server.ServerConnector.accept(ServerConnector.java:371)
        at 
org.eclipse.jetty.server.AbstractConnector$Acceptor.run(AbstractConnector.java:601)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
        at java.lang.Thread.run(Thread.java:748)
  30) Thread[id=15524, name=recoveryExecutor-3289-thread-1, 
state=TIMED_WAITING, group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  31) Thread[id=15483, name=zkCallback-3291-thread-3, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  32) Thread[id=15514, name=coreZkRegister-4822-thread-2, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  33) Thread[id=15427, name=qtp1749021917-15427, state=RUNNABLE, 
group=TGRP-UnloadDistributedZkTest]
        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
        at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.select(ManagedSelector.java:243)
        at 
org.eclipse.jetty.io.ManagedSelector$SelectorProducer.produce(ManagedSelector.java:191)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:249)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
        at 
org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
        at 
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
        at java.lang.Thread.run(Thread.java:748)
  34) Thread[id=15505, 
name=OverseerStateUpdate-99068951044161551-127.0.0.1:44686_-n_0000000003, 
state=TIMED_WAITING, group=Overseer state updater.]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
        at 
org.apache.solr.cloud.ZkDistributedQueue.peekElements(ZkDistributedQueue.java:435)
        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:203)
        at java.lang.Thread.run(Thread.java:748)
  35) Thread[id=15484, name=zkCallback-3291-thread-4, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  36) Thread[id=15506, 
name=OverseerCollectionConfigSetProcessor-99068951044161551-127.0.0.1:44686_-n_0000000003,
 state=TIMED_WAITING, group=Overseer collection creation process.]
        at java.lang.Thread.sleep(Native Method)
        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryDelay(ZkCmdExecutor.java:111)
        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:70)
        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
        at 
org.apache.solr.cloud.OverseerTaskProcessor.amILeader(OverseerTaskProcessor.java:387)
        at 
org.apache.solr.cloud.OverseerTaskProcessor.run(OverseerTaskProcessor.java:193)
        at java.lang.Thread.run(Thread.java:748)
  37) Thread[id=15445, name=Scheduler-1455035820, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  38) Thread[id=15535, name=zkCallback-3285-thread-6, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  39) Thread[id=15536, name=zkCallback-3285-thread-7, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  40) Thread[id=15461, 
name=org.eclipse.jetty.server.session.HashSessionManager@a97ab0Timer, 
state=TIMED_WAITING, group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  41) Thread[id=15493, name=zkCallback-3285-thread-5, state=TIMED_WAITING, 
group=TGRP-UnloadDistributedZkTest]
        at sun.misc.Unsafe.park(Native Method)
        at 
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460)
        at 
java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1073)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  42) Thread[id=15508, 
name=OverseerAutoScalingTriggerThread-99068951044161551-127.0.0.1:44686_-n_0000000003,
 state=WAITING, group=Overseer autoscaling triggers]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(Ov

[...truncated too long message...]

Listener done.
   [junit4]   2> 93609 INFO  
(searcherExecutor-7-thread-1-processing-x:collection1) [    x:collection1] 
o.a.s.c.SolrCore [collection1] Registered new searcher 
Searcher@7ecde9c6[collection1] 
main{ExitableDirectoryReader(UninvertingDirectoryReader(Uninverting(_0(7.2.0):C101)
 Uninverting(_1(7.2.0):C399) Uninverting(_2(7.2.0):C1)))}
   [junit4]   2> 93609 INFO  
(searcherExecutor-7-thread-1-processing-x:collection1) [    x:collection1] 
o.a.s.u.LoggingInfoStream 
[IW][searcherExecutor-7-thread-1-processing-x:collection1]: decRefDeleter for 
NRT reader version=8 segments=_0(7.2.0):C101 _1(7.2.0):C399
   [junit4]   2> 93609 INFO  (qtp1958724003-18) [    x:collection1] 
o.a.s.u.p.LogUpdateProcessorFactory [collection1]  webapp=/solr path=/update 
params={waitSearcher=true&commit=true&softCommit=false&wt=javabin&version=2}{commit=}
 0 166
   [junit4]   2> 93617 INFO  (qtp1958724003-18) [    x:collection1] 
o.a.s.c.S.Request [collection1]  webapp=/solr path=/select 
params={q=id:collection&wt=javabin&version=2} hits=1 status=0 QTime=4
   [junit4]   2> 94044 INFO  (qtp1958724003-21) [    x:collection1] 
o.a.s.c.S.Request [collection1]  webapp=/solr path=/select 
params={q=id:collection&wt=javabin&version=2} hits=1 status=0 QTime=0
   [junit4]   2> 94046 INFO  
(TEST-ConcurrentUpdateSolrClientTest.testCollectionParameters-seed#[2DF33371342A6DC6])
 [    ] o.a.s.SolrTestCaseJ4 ###Ending testCollectionParameters
   [junit4]   2> 94491 INFO  
(SUITE-ConcurrentUpdateSolrClientTest-seed#[2DF33371342A6DC6]-worker) [    ] 
o.e.j.s.AbstractConnector Stopped ServerConnector@3201f6bb{SSL,[ssl, 
http/1.1]}{127.0.0.1:0}
   [junit4]   2> 94491 INFO  
(SUITE-ConcurrentUpdateSolrClientTest-seed#[2DF33371342A6DC6]-worker) [    ] 
o.a.s.c.CoreContainer Shutting down CoreContainer instance=39807441
   [junit4]   2> 94510 INFO  
(SUITE-ConcurrentUpdateSolrClientTest-seed#[2DF33371342A6DC6]-worker) [    ] 
o.a.s.m.SolrMetricManager Closing metric reporters for registry=solr.node, 
tag=null
   [junit4]   2> 94510 INFO  
(SUITE-ConcurrentUpdateSolrClientTest-seed#[2DF33371342A6DC6]-worker) [    ] 
o.a.s.m.SolrMetricManager Closing metric reporters for registry=solr.jvm, 
tag=null
   [junit4]   2> 94510 INFO  
(SUITE-ConcurrentUpdateSolrClientTest-seed#[2DF33371342A6DC6]-worker) [    ] 
o.a.s.m.SolrMetricManager Closing metric reporters for registry=solr.jetty, 
tag=null
   [junit4]   2> 94511 INFO  (coreCloseExecutor-12-thread-1) [    
x:collection1] o.a.s.c.SolrCore [collection1]  CLOSING SolrCore 
org.apache.solr.core.SolrCore@2c07db7f
   [junit4]   2> 94512 INFO  (coreCloseExecutor-12-thread-1) [    
x:collection1] o.a.s.m.SolrMetricManager Closing metric reporters for 
registry=solr.core.collection1, tag=738712447
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docValues:{}, maxPointsInLeafNode=1943, maxMBSortInHeap=5.925298382433395, 
sim=RandomSimilarity(queryNorm=false): {}, locale=sr-Latn-ME, timezone=EST
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[ConcurrentUpdateSolrClientTest]
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FAILURES!

[...truncated 46839 lines...]

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