Build: https://jenkins.thetaphi.de/job/Lucene-Solr-7.x-Linux/1423/
Java: 64bit/jdk-10-ea+43 -XX:+UseCompressedOops -XX:+UseConcMarkSweepGC

4 tests failed.
FAILED:  junit.framework.TestSuite.org.apache.solr.cloud.BasicZkTest

Error Message:
SolrCore.getOpenCount()==2

Stack Trace:
java.lang.RuntimeException: SolrCore.getOpenCount()==2
        at __randomizedtesting.SeedInfo.seed([E7C6E85DFDF96140]:0)
        at org.apache.solr.util.TestHarness.close(TestHarness.java:379)
        at org.apache.solr.SolrTestCaseJ4.deleteCore(SolrTestCaseJ4.java:792)
        at 
org.apache.solr.cloud.AbstractZkTestCase.azt_afterClass(AbstractZkTestCase.java:147)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:564)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1737)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:897)
        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 
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.base/java.lang.Thread.run(Thread.java:844)


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

Error Message:
SolrCore.getOpenCount()==2

Stack Trace:
java.lang.RuntimeException: SolrCore.getOpenCount()==2
        at __randomizedtesting.SeedInfo.seed([E7C6E85DFDF96140]:0)
        at org.apache.solr.util.TestHarness.close(TestHarness.java:379)
        at org.apache.solr.SolrTestCaseJ4.deleteCore(SolrTestCaseJ4.java:792)
        at 
org.apache.solr.SolrTestCaseJ4.teardownTestCases(SolrTestCaseJ4.java:288)
        at jdk.internal.reflect.GeneratedMethodAccessor38.invoke(Unknown Source)
        at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:564)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1737)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:897)
        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 
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.base/java.lang.Thread.run(Thread.java:844)


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

Error Message:
29 threads leaked from SUITE scope at org.apache.solr.cloud.BasicZkTest:     1) 
Thread[id=9423, name=zkCallback-1400-thread-4, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    2) 
Thread[id=9431, name=zkCallback-1400-thread-6, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    3) 
Thread[id=9398, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at java.base@10/java.lang.Thread.sleep(Native 
Method)         at 
app//org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    4) 
Thread[id=9405, name=zkConnectionManagerCallback-1401-thread-1, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    5) 
Thread[id=9409, 
name=OverseerAutoScalingTriggerThread-72207436250873859-88.99.242.108:8983_-n_0000000000,
 state=WAITING, group=Overseer autoscaling triggers]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
app//org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:175)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    6) 
Thread[id=9399, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at java.base@10/java.lang.Thread.sleep(Native 
Method)         at 
app//org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    7) 
Thread[id=9406, 
name=OverseerStateUpdate-72207436250873859-88.99.242.108:8983_-n_0000000000, 
state=TIMED_WAITING, group=Overseer state updater.]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2117)
         at 
app//org.apache.solr.cloud.ZkDistributedQueue.peekElements(ZkDistributedQueue.java:463)
         at 
app//org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:205)  
       at java.base@10/java.lang.Thread.run(Thread.java:844)    8) 
Thread[id=9422, name=zkCallback-1400-thread-3, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    9) 
Thread[id=9430, name=ProcessThread(sid:0 cport:40395):, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
         at 
app//org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.java:123)
   10) Thread[id=9407, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at java.base@10/java.lang.Thread.sleep(Native 
Method)         at 
app//org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   11) 
Thread[id=9403, 
name=SUITE-BasicZkTest-seed#[E7C6E85DFDF96140]-worker-SendThread(127.0.0.1:40395),
 state=RUNNABLE, group=TGRP-BasicZkTest]         at 
java.base@10/sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)         at 
java.base@10/sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:265)      
   at 
java.base@10/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:92)   
      at 
java.base@10/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:89)      
   at java.base@10/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:100)        
 at 
app//org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:349)
         at 
app//org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1144)   12) 
Thread[id=9404, 
name=SUITE-BasicZkTest-seed#[E7C6E85DFDF96140]-worker-EventThread, 
state=WAITING, group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
         at 
app//org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:502)   13) 
Thread[id=9411, name=ScheduledTrigger-3724-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2117)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1182)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   14) 
Thread[id=9416, name=zkCallback-1400-thread-2, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   15) 
Thread[id=9420, name=searcherExecutor-3729-thread-1, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   16) 
Thread[id=9410, name=zkCallback-1400-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   17) 
Thread[id=9415, name=watches-1402-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   18) 
Thread[id=9414, name=Thread-3684, state=WAITING, group=TGRP-BasicZkTest]        
 at java.base@10/java.lang.Object.wait(Native Method)         at 
java.base@10/java.lang.Object.wait(Object.java:328)         at 
app//org.apache.solr.core.CloserThread.run(CoreContainer.java:1722)   19) 
Thread[id=9418, name=ScheduledTrigger-3724-thread-3, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   20) 
Thread[id=9424, name=zkCallback-1400-thread-5, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   21) 
Thread[id=9428, name=SessionTracker, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at java.base@10/java.lang.Object.wait(Native 
Method)         at 
app//org.apache.zookeeper.server.SessionTrackerImpl.run(SessionTrackerImpl.java:147)
   22) Thread[id=9426, name=Thread-3685, state=WAITING, group=TGRP-BasicZkTest] 
        at java.base@10/java.lang.Object.wait(Native Method)         at 
java.base@10/java.lang.Thread.join(Thread.java:1353)         at 
java.base@10/java.lang.Thread.join(Thread.java:1427)         at 
app//org.apache.zookeeper.server.NIOServerCnxnFactory.join(NIOServerCnxnFactory.java:313)
         at 
app//org.apache.solr.cloud.ZkTestServer$ZKServerMain.runFromConfig(ZkTestServer.java:310)
         at 
app//org.apache.solr.cloud.ZkTestServer$2.run(ZkTestServer.java:491)   23) 
Thread[id=9421, name=coreZkRegister-3719-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   24) 
Thread[id=9427, name=NIOServerCxn.Factory:0.0.0.0/0.0.0.0:40395, 
state=RUNNABLE, group=TGRP-BasicZkTest]         at 
java.base@10/sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)         at 
java.base@10/sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:265)      
   at 
java.base@10/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:92)   
      at 
java.base@10/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:89)      
   at java.base@10/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:100)        
 at 
app//org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:196)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   25) 
Thread[id=9408, 
name=OverseerCollectionConfigSetProcessor-72207436250873859-88.99.242.108:8983_-n_0000000000,
 state=TIMED_WAITING, group=Overseer collection creation process.]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2117)
         at 
app//org.apache.solr.cloud.ZkDistributedQueue.peekElements(ZkDistributedQueue.java:463)
         at 
app//org.apache.solr.cloud.OverseerTaskQueue.peekTopN(OverseerTaskQueue.java:243)
         at 
app//org.apache.solr.cloud.OverseerTaskProcessor.run(OverseerTaskProcessor.java:228)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   26) 
Thread[id=9425, name=ScheduledTrigger-3724-thread-4, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   27) 
Thread[id=9432, name=zkCallback-1400-thread-7, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   28) 
Thread[id=9417, name=watches-1402-thread-2, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   29) 
Thread[id=9412, name=ScheduledTrigger-3724-thread-2, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)

Stack Trace:
com.carrotsearch.randomizedtesting.ThreadLeakError: 29 threads leaked from 
SUITE scope at org.apache.solr.cloud.BasicZkTest: 
   1) Thread[id=9423, name=zkCallback-1400-thread-4, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   2) Thread[id=9431, name=zkCallback-1400-thread-6, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   3) Thread[id=9398, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/java.lang.Thread.sleep(Native Method)
        at 
app//org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   4) Thread[id=9405, name=zkConnectionManagerCallback-1401-thread-1, 
state=WAITING, group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   5) Thread[id=9409, 
name=OverseerAutoScalingTriggerThread-72207436250873859-88.99.242.108:8983_-n_0000000000,
 state=WAITING, group=Overseer autoscaling triggers]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
app//org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:175)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   6) Thread[id=9399, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/java.lang.Thread.sleep(Native Method)
        at 
app//org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   7) Thread[id=9406, 
name=OverseerStateUpdate-72207436250873859-88.99.242.108:8983_-n_0000000000, 
state=TIMED_WAITING, group=Overseer state updater.]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2117)
        at 
app//org.apache.solr.cloud.ZkDistributedQueue.peekElements(ZkDistributedQueue.java:463)
        at 
app//org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:205)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   8) Thread[id=9422, name=zkCallback-1400-thread-3, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   9) Thread[id=9430, name=ProcessThread(sid:0 cport:40395):, state=WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at 
app//org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.java:123)
  10) Thread[id=9407, name=Connection evictor, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/java.lang.Thread.sleep(Native Method)
        at 
app//org.apache.http.impl.client.IdleConnectionEvictor$1.run(IdleConnectionEvictor.java:66)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  11) Thread[id=9403, 
name=SUITE-BasicZkTest-seed#[E7C6E85DFDF96140]-worker-SendThread(127.0.0.1:40395),
 state=RUNNABLE, group=TGRP-BasicZkTest]
        at java.base@10/sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at 
java.base@10/sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:265)
        at 
java.base@10/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:92)
        at 
java.base@10/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:89)
        at java.base@10/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:100)
        at 
app//org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:349)
        at 
app//org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1144)
  12) Thread[id=9404, 
name=SUITE-BasicZkTest-seed#[E7C6E85DFDF96140]-worker-EventThread, 
state=WAITING, group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at 
app//org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:502)
  13) Thread[id=9411, name=ScheduledTrigger-3724-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2117)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1182)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  14) Thread[id=9416, name=zkCallback-1400-thread-2, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  15) Thread[id=9420, name=searcherExecutor-3729-thread-1, state=WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  16) Thread[id=9410, name=zkCallback-1400-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  17) Thread[id=9415, name=watches-1402-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  18) Thread[id=9414, name=Thread-3684, state=WAITING, group=TGRP-BasicZkTest]
        at java.base@10/java.lang.Object.wait(Native Method)
        at java.base@10/java.lang.Object.wait(Object.java:328)
        at app//org.apache.solr.core.CloserThread.run(CoreContainer.java:1722)
  19) Thread[id=9418, name=ScheduledTrigger-3724-thread-3, state=WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  20) Thread[id=9424, name=zkCallback-1400-thread-5, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  21) Thread[id=9428, name=SessionTracker, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/java.lang.Object.wait(Native Method)
        at 
app//org.apache.zookeeper.server.SessionTrackerImpl.run(SessionTrackerImpl.java:147)
  22) Thread[id=9426, name=Thread-3685, state=WAITING, group=TGRP-BasicZkTest]
        at java.base@10/java.lang.Object.wait(Native Method)
        at java.base@10/java.lang.Thread.join(Thread.java:1353)
        at java.base@10/java.lang.Thread.join(Thread.java:1427)
        at 
app//org.apache.zookeeper.server.NIOServerCnxnFactory.join(NIOServerCnxnFactory.java:313)
        at 
app//org.apache.solr.cloud.ZkTestServer$ZKServerMain.runFromConfig(ZkTestServer.java:310)
        at app//org.apache.solr.cloud.ZkTestServer$2.run(ZkTestServer.java:491)
  23) Thread[id=9421, name=coreZkRegister-3719-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  24) Thread[id=9427, name=NIOServerCxn.Factory:0.0.0.0/0.0.0.0:40395, 
state=RUNNABLE, group=TGRP-BasicZkTest]
        at java.base@10/sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at 
java.base@10/sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:265)
        at 
java.base@10/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:92)
        at 
java.base@10/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:89)
        at java.base@10/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:100)
        at 
app//org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:196)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  25) Thread[id=9408, 
name=OverseerCollectionConfigSetProcessor-72207436250873859-88.99.242.108:8983_-n_0000000000,
 state=TIMED_WAITING, group=Overseer collection creation process.]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2117)
        at 
app//org.apache.solr.cloud.ZkDistributedQueue.peekElements(ZkDistributedQueue.java:463)
        at 
app//org.apache.solr.cloud.OverseerTaskQueue.peekTopN(OverseerTaskQueue.java:243)
        at 
app//org.apache.solr.cloud.OverseerTaskProcessor.run(OverseerTaskProcessor.java:228)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  26) Thread[id=9425, name=ScheduledTrigger-3724-thread-4, state=WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  27) Thread[id=9432, name=zkCallback-1400-thread-7, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  28) Thread[id=9417, name=watches-1402-thread-2, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  29) Thread[id=9412, name=ScheduledTrigger-3724-thread-2, state=WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
        at __randomizedtesting.SeedInfo.seed([E7C6E85DFDF96140]:0)


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

Error Message:
There are still zombie threads that couldn't be terminated:    1) 
Thread[id=9423, name=zkCallback-1400-thread-4, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    2) 
Thread[id=9431, name=zkCallback-1400-thread-6, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    3) 
Thread[id=9415, name=watches-1402-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    4) 
Thread[id=9414, name=Thread-3684, state=WAITING, group=TGRP-BasicZkTest]        
 at java.base@10/java.lang.Object.wait(Native Method)         at 
java.base@10/java.lang.Object.wait(Object.java:328)         at 
app//org.apache.solr.core.CloserThread.run(CoreContainer.java:1722)    5) 
Thread[id=9405, name=zkConnectionManagerCallback-1401-thread-1, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    6) 
Thread[id=9418, name=ScheduledTrigger-3724-thread-3, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    7) 
Thread[id=9424, name=zkCallback-1400-thread-5, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    8) 
Thread[id=9422, name=zkCallback-1400-thread-3, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)    9) 
Thread[id=9421, name=coreZkRegister-3719-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   10) 
Thread[id=9403, 
name=SUITE-BasicZkTest-seed#[E7C6E85DFDF96140]-worker-SendThread(127.0.0.1:40395),
 state=TIMED_WAITING, group=TGRP-BasicZkTest]         at 
java.base@10/java.lang.Thread.sleep(Native Method)         at 
app//org.apache.zookeeper.client.StaticHostProvider.next(StaticHostProvider.java:105)
         at 
app//org.apache.zookeeper.ClientCnxn$SendThread.startConnect(ClientCnxn.java:1000)
         at 
app//org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1063)   11) 
Thread[id=9411, name=ScheduledTrigger-3724-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2117)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1182)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   12) 
Thread[id=9416, name=zkCallback-1400-thread-2, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   13) 
Thread[id=9425, name=ScheduledTrigger-3724-thread-4, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   14) 
Thread[id=9432, name=zkCallback-1400-thread-7, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   15) 
Thread[id=9417, name=watches-1402-thread-2, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   16) 
Thread[id=9420, name=searcherExecutor-3729-thread-1, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   17) 
Thread[id=9412, name=ScheduledTrigger-3724-thread-2, state=WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)  
       at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
         at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)   18) 
Thread[id=9410, name=zkCallback-1400-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]         at 
java.base@10/jdk.internal.misc.Unsafe.park(Native Method)         at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
         at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
         at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
         at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
         at java.base@10/java.lang.Thread.run(Thread.java:844)

Stack Trace:
com.carrotsearch.randomizedtesting.ThreadLeakError: There are still zombie 
threads that couldn't be terminated:
   1) Thread[id=9423, name=zkCallback-1400-thread-4, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   2) Thread[id=9431, name=zkCallback-1400-thread-6, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   3) Thread[id=9415, name=watches-1402-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   4) Thread[id=9414, name=Thread-3684, state=WAITING, group=TGRP-BasicZkTest]
        at java.base@10/java.lang.Object.wait(Native Method)
        at java.base@10/java.lang.Object.wait(Object.java:328)
        at app//org.apache.solr.core.CloserThread.run(CoreContainer.java:1722)
   5) Thread[id=9405, name=zkConnectionManagerCallback-1401-thread-1, 
state=WAITING, group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   6) Thread[id=9418, name=ScheduledTrigger-3724-thread-3, state=WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   7) Thread[id=9424, name=zkCallback-1400-thread-5, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   8) Thread[id=9422, name=zkCallback-1400-thread-3, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
   9) Thread[id=9421, name=coreZkRegister-3719-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  10) Thread[id=9403, 
name=SUITE-BasicZkTest-seed#[E7C6E85DFDF96140]-worker-SendThread(127.0.0.1:40395),
 state=TIMED_WAITING, group=TGRP-BasicZkTest]
        at java.base@10/java.lang.Thread.sleep(Native Method)
        at 
app//org.apache.zookeeper.client.StaticHostProvider.next(StaticHostProvider.java:105)
        at 
app//org.apache.zookeeper.ClientCnxn$SendThread.startConnect(ClientCnxn.java:1000)
        at 
app//org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1063)
  11) Thread[id=9411, name=ScheduledTrigger-3724-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2117)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1182)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  12) Thread[id=9416, name=zkCallback-1400-thread-2, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  13) Thread[id=9425, name=ScheduledTrigger-3724-thread-4, state=WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  14) Thread[id=9432, name=zkCallback-1400-thread-7, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  15) Thread[id=9417, name=watches-1402-thread-2, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  16) Thread[id=9420, name=searcherExecutor-3729-thread-1, state=WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  17) Thread[id=9412, name=ScheduledTrigger-3724-thread-2, state=WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
        at 
java.base@10/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2075)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1177)
        at 
java.base@10/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1061)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
  18) Thread[id=9410, name=zkCallback-1400-thread-1, state=TIMED_WAITING, 
group=TGRP-BasicZkTest]
        at java.base@10/jdk.internal.misc.Unsafe.park(Native Method)
        at 
java.base@10/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462)
        at 
java.base@10/java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361)
        at 
java.base@10/java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1060)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1121)
        at 
java.base@10/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base@10/java.lang.Thread.run(Thread.java:844)
        at __randomizedtesting.SeedInfo.seed([E7C6E85DFDF96140]:0)




Build Log:
[...truncated 1776 lines...]
   [junit4] JVM J1: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/core/test/temp/junit4-J1-20180225_010917_6599716174683924948802.syserr
   [junit4] >>> JVM J1 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J1: EOF ----

[...truncated 3 lines...]
   [junit4] JVM J0: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/core/test/temp/junit4-J0-20180225_010917_6591364694132217560451.syserr
   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

[...truncated 9 lines...]
   [junit4] JVM J2: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/core/test/temp/junit4-J2-20180225_010917_6599086718573652185169.syserr
   [junit4] >>> JVM J2 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J2: EOF ----

[...truncated 289 lines...]
   [junit4] JVM J0: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/test-framework/test/temp/junit4-J0-20180225_011631_7255768237255383252493.syserr
   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

[...truncated 9 lines...]
   [junit4] JVM J1: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/test-framework/test/temp/junit4-J1-20180225_011631_72613604665513151593503.syserr
   [junit4] >>> JVM J1 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J1: EOF ----

[...truncated 3 lines...]
   [junit4] JVM J2: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/test-framework/test/temp/junit4-J2-20180225_011631_7248580969980507457667.syserr
   [junit4] >>> JVM J2 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J2: EOF ----

[...truncated 1068 lines...]
   [junit4] JVM J1: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/analysis/common/test/temp/junit4-J1-20180225_011800_05616699757846727425380.syserr
   [junit4] >>> JVM J1 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J1: EOF ----

   [junit4] JVM J0: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/analysis/common/test/temp/junit4-J0-20180225_011800_0562001429900092163162.syserr
   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

   [junit4] JVM J2: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/analysis/common/test/temp/junit4-J2-20180225_011800_05815801967846791228065.syserr
   [junit4] >>> JVM J2 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J2: EOF ----

[...truncated 242 lines...]
   [junit4] JVM J2: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/analysis/icu/test/temp/junit4-J2-20180225_011954_79816510938520991869706.syserr
   [junit4] >>> JVM J2 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J2: EOF ----

   [junit4] JVM J0: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/analysis/icu/test/temp/junit4-J0-20180225_011954_79817462069250170312266.syserr
   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

[...truncated 3 lines...]
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/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/analysis/icu/test/temp/junit4-J1-20180225_011954_79818408414775494008228.syserr
   [junit4] >>> JVM J1 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J1: EOF ----

[...truncated 256 lines...]
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/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/analysis/kuromoji/test/temp/junit4-J0-20180225_012006_8255955527237420168396.syserr
   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

   [junit4] JVM J1: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/analysis/kuromoji/test/temp/junit4-J1-20180225_012006_82515172865702294605070.syserr
   [junit4] >>> JVM J1 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J1: EOF ----

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/home/jenkins/workspace/Lucene-Solr-7.x-Linux/lucene/build/analysis/kuromoji/test/temp/junit4-J2-20180225_012006_8253454947165183571177.syserr
   [junit4] >>> JVM J2 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J2: EOF ----

[...truncated 162 lines...]
   [junit4] JVM J1: stderr was not empty, see: /home/jenkins/workspace/Lu

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

OF ----

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/home/jenkins/workspace/Lucene-Solr-7.x-Linux/solr/build/contrib/solr-dataimporthandler-extras/test/temp/junit4-J0-20180225_020055_9797536357337374952361.syserr
   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

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   [junit4] JVM J2: stderr was not empty, see: 
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   [junit4] >>> JVM J2 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J2: EOF ----

   [junit4] JVM J1: stderr was not empty, see: 
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   [junit4] >>> JVM J1 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J1: EOF ----

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   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
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deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

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   [junit4] JVM J1: stderr was not empty, see: 
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deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J1: EOF ----

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   [junit4] JVM J2: stderr was not empty, see: 
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   [junit4] >>> JVM J2 emitted unexpected output (verbatim) ----
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deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J2: EOF ----

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   [junit4] JVM J0: stderr was not empty, see: 
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deprecated in version 9.0 and will likely be removed in a future release.
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   [junit4] JVM J1: stderr was not empty, see: 
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deprecated in version 9.0 and will likely be removed in a future release.
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deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

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   [junit4] JVM J2: stderr was not empty, see: 
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   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J2: EOF ----

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   [junit4] JVM J2: stderr was not empty, see: 
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   [junit4] >>> JVM J2 emitted unexpected output (verbatim) ----
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deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J2: EOF ----

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   [junit4] >>> JVM J1 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J1: EOF ----

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   [junit4] JVM J0: stderr was not empty, see: 
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   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
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deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

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   [junit4] JVM J1: stderr was not empty, see: 
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   [junit4] >>> JVM J1 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J1: EOF ----

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   [junit4] JVM J0: stderr was not empty, see: 
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   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

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   [junit4] JVM J0: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/solr/build/contrib/solr-velocity/test/temp/junit4-J0-20180225_020231_8157887681299831187379.syserr
   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

[...truncated 32533 lines...]
[repro] Jenkins log URL: 
https://jenkins.thetaphi.de/job/Lucene-Solr-7.x-Linux/1423/consoleText

[repro] Revision: d7f6cb93837e1bde1066c96606845c4ab04e50cf

[repro] Repro line:  ant test  -Dtestcase=BasicZkTest 
-Dtests.seed=E7C6E85DFDF96140 -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=cy-GB -Dtests.timezone=America/El_Salvador -Dtests.asserts=true 
-Dtests.file.encoding=UTF-8

[repro] Ant options: "-Dargs=-XX:+UseCompressedOops -XX:+UseConcMarkSweepGC"
[repro] ant clean

[...truncated 6 lines...]
[repro] Test suites by module:
[repro]    solr/core
[repro]       BasicZkTest
[repro] ant compile-test

[...truncated 3315 lines...]
[repro] ant test-nocompile -Dtests.dups=5 -Dtests.maxfailures=5 
-Dtests.class="*.BasicZkTest" -Dtests.showOutput=onerror 
"-Dargs=-XX:+UseCompressedOops -XX:+UseConcMarkSweepGC" 
-Dtests.seed=E7C6E85DFDF96140 -Dtests.multiplier=3 -Dtests.slow=true 
-Dtests.locale=cy-GB -Dtests.timezone=America/El_Salvador -Dtests.asserts=true 
-Dtests.file.encoding=UTF-8

[...truncated 45 lines...]
   [junit4] JVM J1: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/solr/build/solr-core/test/temp/junit4-J1-20180225_020523_7179322518903347719030.syserr
   [junit4] >>> JVM J1 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J1: EOF ----

[...truncated 4 lines...]
   [junit4] JVM J2: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/solr/build/solr-core/test/temp/junit4-J2-20180225_020523_715680939920153202592.syserr
   [junit4] >>> JVM J2 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J2: EOF ----

[...truncated 4 lines...]
   [junit4] JVM J0: stderr was not empty, see: 
/home/jenkins/workspace/Lucene-Solr-7.x-Linux/solr/build/solr-core/test/temp/junit4-J0-20180225_020523_7134375943821911987746.syserr
   [junit4] >>> JVM J0 emitted unexpected output (verbatim) ----
   [junit4] OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was 
deprecated in version 9.0 and will likely be removed in a future release.
   [junit4] <<< JVM J0: EOF ----

[...truncated 23 lines...]
[repro] Failures:
[repro]   0/5 failed: org.apache.solr.cloud.BasicZkTest
[repro] Exiting with code 0

[...truncated 40 lines...]
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