[JENKINS] Solr-main-Linux (64bit/jdk-15) - Build # 1409 - Unstable!

[Policeman Jenkins Server <je...@thetaphi.de>]

Build: https://jenkins.thetaphi.de/job/Solr-main-Linux/1409/
Java: 64bit/jdk-15 -XX:-UseCompressedOops -XX:+UseG1GC

3 tests failed.
FAILED:  org.apache.solr.cloud.ZkFailoverTest.testRestartZkWhenClusterDown

Error Message:
java.lang.AssertionError: Timeout waiting for number of live nodes = 0

Stack Trace:
java.lang.AssertionError: Timeout waiting for number of live nodes = 0
	at __randomizedtesting.SeedInfo.seed([C25691376644F280:ACC1127B1FA35403]:0)
	at org.junit.Assert.fail(Assert.java:89)
	at org.apache.solr.cloud.ZkFailoverTest.waitForLiveNodes(ZkFailoverTest.java:102)
	at org.apache.solr.cloud.ZkFailoverTest.testRestartZkWhenClusterDown(ZkFailoverTest.java:57)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	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:1754)
	at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:942)
	at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:978)
	at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:992)
	at com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:44)
	at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
	at org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
	at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
	at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:370)
	at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:819)
	at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:470)
	at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:951)
	at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:836)
	at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:887)
	at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:898)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
	at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
	at com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:38)
	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.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
	at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
	at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
	at org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:47)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:370)
	at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:826)
	at java.base/java.lang.Thread.run(Thread.java:832)


FAILED:  org.apache.solr.cloud.ZkFailoverTest.classMethod

Error Message:
com.carrotsearch.randomizedtesting.ThreadLeakError: 41 threads leaked from SUITE scope at org.apache.solr.cloud.ZkFailoverTest: 
   1) Thread[id=14000, name=NIOWorkerThread-16, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   2) Thread[id=14015, name=NIOWorkerThread-24, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   3) Thread[id=13937, name=ZkTestServer Run Thread, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/java.lang.Object.wait(Native Method)
        at java.base@15/java.lang.Thread.join(Thread.java:1303)
        at java.base@15/java.lang.Thread.join(Thread.java:1371)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory.join(NIOServerCnxnFactory.java:915)
        at app//org.apache.solr.cloud.ZkTestServer$ZKServerMain.runFromConfig(ZkTestServer.java:348)
        at app//org.apache.solr.cloud.ZkTestServer$2.run(ZkTestServer.java:579)
   4) Thread[id=14013, name=NIOWorkerThread-22, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   5) Thread[id=13961, name=NIOWorkerThread-9, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   6) Thread[id=14014, name=NIOWorkerThread-23, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   7) Thread[id=14021, name=NIOWorkerThread-30, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   8) Thread[id=13942, name=SessionTracker, state=TIMED_WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/java.lang.Thread.sleep(Native Method)
        at app//org.apache.zookeeper.server.SessionTrackerImpl.run(SessionTrackerImpl.java:162)
   9) Thread[id=14008, name=NIOWorkerThread-18, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  10) Thread[id=13959, name=NIOWorkerThread-8, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  11) Thread[id=13944, name=ProcessThread(sid:0 cport:43461):, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at app//org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.java:141)
  12) Thread[id=13938, name=ConnnectionExpirer, state=TIMED_WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/java.lang.Thread.sleep(Native Method)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$ConnectionExpirerThread.run(NIOServerCnxnFactory.java:554)
  13) Thread[id=13994, name=NIOWorkerThread-11, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  14) Thread[id=14019, name=NIOWorkerThread-28, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  15) Thread[id=13955, name=NIOWorkerThread-5, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  16) Thread[id=14001, name=NIOWorkerThread-17, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  17) Thread[id=14022, name=NIOWorkerThread-31, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  18) Thread[id=13957, name=NIOWorkerThread-6, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  19) Thread[id=13999, name=NIOWorkerThread-15, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  20) Thread[id=13998, name=NIOWorkerThread-14, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  21) Thread[id=13958, name=NIOWorkerThread-7, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  22) Thread[id=13996, name=NIOWorkerThread-12, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  23) Thread[id=13946, name=NIOWorkerThread-1, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  24) Thread[id=13943, name=SyncThread:0, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at app//org.apache.zookeeper.server.SyncRequestProcessor.run(SyncRequestProcessor.java:170)
  25) Thread[id=14012, name=NIOWorkerThread-21, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  26) Thread[id=14011, name=NIOWorkerThread-20, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  27) Thread[id=13950, name=NIOWorkerThread-3, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  28) Thread[id=13993, name=NIOWorkerThread-10, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  29) Thread[id=14018, name=NIOWorkerThread-27, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  30) Thread[id=13941, name=NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:43461, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.EPoll.wait(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.select(NIOServerCnxnFactory.java:205)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.run(NIOServerCnxnFactory.java:181)
  31) Thread[id=13954, name=NIOWorkerThread-4, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  32) Thread[id=14016, name=NIOWorkerThread-25, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  33) Thread[id=14020, name=NIOWorkerThread-29, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  34) Thread[id=13949, name=NIOWorkerThread-2, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  35) Thread[id=14023, name=NIOWorkerThread-32, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  36) Thread[id=13939, name=NIOServerCxnFactory.SelectorThread-0, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.EPoll.wait(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:403)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:368)
  37) Thread[id=14017, name=NIOWorkerThread-26, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  38) Thread[id=14009, name=NIOWorkerThread-19, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  39) Thread[id=13940, name=NIOServerCxnFactory.SelectorThread-1, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.EPoll.wait(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:403)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:368)
  40) Thread[id=13997, name=NIOWorkerThread-13, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  41) Thread[id=13945, name=RequestThrottler, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at app//org.apache.zookeeper.server.RequestThrottler.run(RequestThrottler.java:147)

Stack Trace:
com.carrotsearch.randomizedtesting.ThreadLeakError: 41 threads leaked from SUITE scope at org.apache.solr.cloud.ZkFailoverTest: 
   1) Thread[id=14000, name=NIOWorkerThread-16, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   2) Thread[id=14015, name=NIOWorkerThread-24, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   3) Thread[id=13937, name=ZkTestServer Run Thread, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/java.lang.Object.wait(Native Method)
        at java.base@15/java.lang.Thread.join(Thread.java:1303)
        at java.base@15/java.lang.Thread.join(Thread.java:1371)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory.join(NIOServerCnxnFactory.java:915)
        at app//org.apache.solr.cloud.ZkTestServer$ZKServerMain.runFromConfig(ZkTestServer.java:348)
        at app//org.apache.solr.cloud.ZkTestServer$2.run(ZkTestServer.java:579)
   4) Thread[id=14013, name=NIOWorkerThread-22, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   5) Thread[id=13961, name=NIOWorkerThread-9, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   6) Thread[id=14014, name=NIOWorkerThread-23, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   7) Thread[id=14021, name=NIOWorkerThread-30, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   8) Thread[id=13942, name=SessionTracker, state=TIMED_WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/java.lang.Thread.sleep(Native Method)
        at app//org.apache.zookeeper.server.SessionTrackerImpl.run(SessionTrackerImpl.java:162)
   9) Thread[id=14008, name=NIOWorkerThread-18, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  10) Thread[id=13959, name=NIOWorkerThread-8, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  11) Thread[id=13944, name=ProcessThread(sid:0 cport:43461):, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at app//org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.java:141)
  12) Thread[id=13938, name=ConnnectionExpirer, state=TIMED_WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/java.lang.Thread.sleep(Native Method)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$ConnectionExpirerThread.run(NIOServerCnxnFactory.java:554)
  13) Thread[id=13994, name=NIOWorkerThread-11, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  14) Thread[id=14019, name=NIOWorkerThread-28, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  15) Thread[id=13955, name=NIOWorkerThread-5, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  16) Thread[id=14001, name=NIOWorkerThread-17, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  17) Thread[id=14022, name=NIOWorkerThread-31, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  18) Thread[id=13957, name=NIOWorkerThread-6, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  19) Thread[id=13999, name=NIOWorkerThread-15, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  20) Thread[id=13998, name=NIOWorkerThread-14, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  21) Thread[id=13958, name=NIOWorkerThread-7, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  22) Thread[id=13996, name=NIOWorkerThread-12, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  23) Thread[id=13946, name=NIOWorkerThread-1, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  24) Thread[id=13943, name=SyncThread:0, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at app//org.apache.zookeeper.server.SyncRequestProcessor.run(SyncRequestProcessor.java:170)
  25) Thread[id=14012, name=NIOWorkerThread-21, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  26) Thread[id=14011, name=NIOWorkerThread-20, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  27) Thread[id=13950, name=NIOWorkerThread-3, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  28) Thread[id=13993, name=NIOWorkerThread-10, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  29) Thread[id=14018, name=NIOWorkerThread-27, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  30) Thread[id=13941, name=NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:43461, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.EPoll.wait(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.select(NIOServerCnxnFactory.java:205)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.run(NIOServerCnxnFactory.java:181)
  31) Thread[id=13954, name=NIOWorkerThread-4, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  32) Thread[id=14016, name=NIOWorkerThread-25, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  33) Thread[id=14020, name=NIOWorkerThread-29, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  34) Thread[id=13949, name=NIOWorkerThread-2, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  35) Thread[id=14023, name=NIOWorkerThread-32, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  36) Thread[id=13939, name=NIOServerCxnFactory.SelectorThread-0, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.EPoll.wait(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:403)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:368)
  37) Thread[id=14017, name=NIOWorkerThread-26, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  38) Thread[id=14009, name=NIOWorkerThread-19, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  39) Thread[id=13940, name=NIOServerCxnFactory.SelectorThread-1, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.EPoll.wait(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:403)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:368)
  40) Thread[id=13997, name=NIOWorkerThread-13, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  41) Thread[id=13945, name=RequestThrottler, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at app//org.apache.zookeeper.server.RequestThrottler.run(RequestThrottler.java:147)
	at __randomizedtesting.SeedInfo.seed([C25691376644F280]:0)


FAILED:  org.apache.solr.cloud.ZkFailoverTest.classMethod

Error Message:
com.carrotsearch.randomizedtesting.ThreadLeakError: There are still zombie threads that couldn't be terminated:
   1) Thread[id=14000, name=NIOWorkerThread-16, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   2) Thread[id=14015, name=NIOWorkerThread-24, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   3) Thread[id=14013, name=NIOWorkerThread-22, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   4) Thread[id=13961, name=NIOWorkerThread-9, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   5) Thread[id=14014, name=NIOWorkerThread-23, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   6) Thread[id=14021, name=NIOWorkerThread-30, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   7) Thread[id=14008, name=NIOWorkerThread-18, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   8) Thread[id=13959, name=NIOWorkerThread-8, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   9) Thread[id=13994, name=NIOWorkerThread-11, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  10) Thread[id=14019, name=NIOWorkerThread-28, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  11) Thread[id=13955, name=NIOWorkerThread-5, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  12) Thread[id=14001, name=NIOWorkerThread-17, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  13) Thread[id=14022, name=NIOWorkerThread-31, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  14) Thread[id=13957, name=NIOWorkerThread-6, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  15) Thread[id=13999, name=NIOWorkerThread-15, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  16) Thread[id=13998, name=NIOWorkerThread-14, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  17) Thread[id=13958, name=NIOWorkerThread-7, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  18) Thread[id=13996, name=NIOWorkerThread-12, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  19) Thread[id=13946, name=NIOWorkerThread-1, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  20) Thread[id=14012, name=NIOWorkerThread-21, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  21) Thread[id=14011, name=NIOWorkerThread-20, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  22) Thread[id=13950, name=NIOWorkerThread-3, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  23) Thread[id=13993, name=NIOWorkerThread-10, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  24) Thread[id=14018, name=NIOWorkerThread-27, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  25) Thread[id=13941, name=NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:43461, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.IOUtil.drain(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.clearInterrupt(EPollSelectorImpl.java:266)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.processEvents(EPollSelectorImpl.java:203)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:137)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.select(NIOServerCnxnFactory.java:205)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.run(NIOServerCnxnFactory.java:181)
  26) Thread[id=13954, name=NIOWorkerThread-4, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  27) Thread[id=14016, name=NIOWorkerThread-25, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  28) Thread[id=14020, name=NIOWorkerThread-29, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  29) Thread[id=13949, name=NIOWorkerThread-2, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  30) Thread[id=14023, name=NIOWorkerThread-32, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  31) Thread[id=13939, name=NIOServerCxnFactory.SelectorThread-0, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.IOUtil.write1(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.wakeup(EPollSelectorImpl.java:254)
        at java.base@15/java.nio.channels.spi.AbstractSelector$1.interrupt(AbstractSelector.java:230)
        at java.base@15/java.nio.channels.spi.AbstractSelector.begin(AbstractSelector.java:236)
        at java.base@15/sun.nio.ch.SelectorImpl.begin(SelectorImpl.java:99)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:116)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:403)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:368)
  32) Thread[id=14017, name=NIOWorkerThread-26, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  33) Thread[id=14009, name=NIOWorkerThread-19, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  34) Thread[id=13940, name=NIOServerCxnFactory.SelectorThread-1, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.IOUtil.drain(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.clearInterrupt(EPollSelectorImpl.java:266)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.processEvents(EPollSelectorImpl.java:203)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:137)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:403)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:368)
  35) Thread[id=13997, name=NIOWorkerThread-13, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)

Stack Trace:
com.carrotsearch.randomizedtesting.ThreadLeakError: There are still zombie threads that couldn't be terminated:
   1) Thread[id=14000, name=NIOWorkerThread-16, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   2) Thread[id=14015, name=NIOWorkerThread-24, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   3) Thread[id=14013, name=NIOWorkerThread-22, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   4) Thread[id=13961, name=NIOWorkerThread-9, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   5) Thread[id=14014, name=NIOWorkerThread-23, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   6) Thread[id=14021, name=NIOWorkerThread-30, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   7) Thread[id=14008, name=NIOWorkerThread-18, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   8) Thread[id=13959, name=NIOWorkerThread-8, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
   9) Thread[id=13994, name=NIOWorkerThread-11, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  10) Thread[id=14019, name=NIOWorkerThread-28, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  11) Thread[id=13955, name=NIOWorkerThread-5, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  12) Thread[id=14001, name=NIOWorkerThread-17, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  13) Thread[id=14022, name=NIOWorkerThread-31, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  14) Thread[id=13957, name=NIOWorkerThread-6, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  15) Thread[id=13999, name=NIOWorkerThread-15, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  16) Thread[id=13998, name=NIOWorkerThread-14, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  17) Thread[id=13958, name=NIOWorkerThread-7, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  18) Thread[id=13996, name=NIOWorkerThread-12, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  19) Thread[id=13946, name=NIOWorkerThread-1, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  20) Thread[id=14012, name=NIOWorkerThread-21, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  21) Thread[id=14011, name=NIOWorkerThread-20, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  22) Thread[id=13950, name=NIOWorkerThread-3, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  23) Thread[id=13993, name=NIOWorkerThread-10, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  24) Thread[id=14018, name=NIOWorkerThread-27, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  25) Thread[id=13941, name=NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:43461, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.IOUtil.drain(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.clearInterrupt(EPollSelectorImpl.java:266)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.processEvents(EPollSelectorImpl.java:203)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:137)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.select(NIOServerCnxnFactory.java:205)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.run(NIOServerCnxnFactory.java:181)
  26) Thread[id=13954, name=NIOWorkerThread-4, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  27) Thread[id=14016, name=NIOWorkerThread-25, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  28) Thread[id=14020, name=NIOWorkerThread-29, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  29) Thread[id=13949, name=NIOWorkerThread-2, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  30) Thread[id=14023, name=NIOWorkerThread-32, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  31) Thread[id=13939, name=NIOServerCxnFactory.SelectorThread-0, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.IOUtil.write1(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.wakeup(EPollSelectorImpl.java:254)
        at java.base@15/java.nio.channels.spi.AbstractSelector$1.interrupt(AbstractSelector.java:230)
        at java.base@15/java.nio.channels.spi.AbstractSelector.begin(AbstractSelector.java:236)
        at java.base@15/sun.nio.ch.SelectorImpl.begin(SelectorImpl.java:99)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:116)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:403)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:368)
  32) Thread[id=14017, name=NIOWorkerThread-26, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  33) Thread[id=14009, name=NIOWorkerThread-19, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
  34) Thread[id=13940, name=NIOServerCxnFactory.SelectorThread-1, state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at java.base@15/sun.nio.ch.IOUtil.drain(Native Method)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.clearInterrupt(EPollSelectorImpl.java:266)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.processEvents(EPollSelectorImpl.java:203)
        at java.base@15/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:137)
        at java.base@15/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:129)
        at java.base@15/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:146)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:403)
        at app//org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:368)
  35) Thread[id=13997, name=NIOWorkerThread-13, state=WAITING, group=TGRP-ZkFailoverTest]
        at java.base@15/jdk.internal.misc.Unsafe.park(Native Method)
        at java.base@15/java.util.concurrent.locks.LockSupport.park(LockSupport.java:341)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionNode.block(AbstractQueuedSynchronizer.java:505)
        at java.base@15/java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3137)
        at java.base@15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1614)
        at java.base@15/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:435)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1056)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1116)
        at java.base@15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
        at java.base@15/java.lang.Thread.run(Thread.java:832)
	at __randomizedtesting.SeedInfo.seed([C25691376644F280]:0)