Build: https://ci-builds.apache.org/job/Lucene/job/Lucene-Solr-Tests-8.x/2011/

4 tests failed.
FAILED:  org.apache.solr.cloud.UnloadDistributedZkTest.test

Error Message:
Error from server at http://127.0.0.1:44797: ADDREPLICA failed to create replica

Stack Trace:
org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error 
from server at http://127.0.0.1:44797: ADDREPLICA failed to create replica
        at 
__randomizedtesting.SeedInfo.seed([C9CBAD31F629727E:419F92EB58D51F86]:0)
        at 
org.apache.solr.client.solrj.impl.HttpSolrClient.executeMethod(HttpSolrClient.java:681)
        at 
org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:266)
        at 
org.apache.solr.client.solrj.impl.HttpSolrClient.request(HttpSolrClient.java:248)
        at 
org.apache.solr.client.solrj.impl.LBSolrClient.doRequest(LBSolrClient.java:369)
        at 
org.apache.solr.client.solrj.impl.LBSolrClient.request(LBSolrClient.java:297)
        at 
org.apache.solr.client.solrj.impl.BaseCloudSolrClient.sendRequest(BaseCloudSolrClient.java:1171)
        at 
org.apache.solr.client.solrj.impl.BaseCloudSolrClient.requestWithRetryOnStaleState(BaseCloudSolrClient.java:934)
        at 
org.apache.solr.client.solrj.impl.BaseCloudSolrClient.request(BaseCloudSolrClient.java:866)
        at 
org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:214)
        at 
org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:231)
        at 
org.apache.solr.cloud.UnloadDistributedZkTest.testCoreUnloadAndLeaders(UnloadDistributedZkTest.java:186)
        at 
org.apache.solr.cloud.UnloadDistributedZkTest.test(UnloadDistributedZkTest.java:69)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1750)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:938)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:974)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:988)
        at 
org.apache.solr.BaseDistributedSearchTestCase$ShardsRepeatRule$ShardsFixedStatement.callStatement(BaseDistributedSearchTestCase.java:1090)
        at 
org.apache.solr.BaseDistributedSearchTestCase$ShardsRepeatRule$ShardsStatement.evaluate(BaseDistributedSearchTestCase.java:1061)
        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:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at org.junit.rules.RunRules.evaluate(RunRules.java:20)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:817)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:468)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:947)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:832)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:883)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:894)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        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:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at org.junit.rules.RunRules.evaluate(RunRules.java:20)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
        at java.lang.Thread.run(Thread.java:748)


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

Error Message:
Timeout waiting for number of live nodes = 2

Stack Trace:
java.lang.AssertionError: Timeout waiting for number of live nodes = 2
        at 
__randomizedtesting.SeedInfo.seed([C9CBAD31F629727E:A75C2E7D8FCED4FD]: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:62)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1750)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:938)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:974)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:988)
        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:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at org.junit.rules.RunRules.evaluate(RunRules.java:20)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:817)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:468)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:947)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:832)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:883)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:894)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        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:45)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
        at org.junit.rules.RunRules.evaluate(RunRules.java:20)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
        at java.lang.Thread.run(Thread.java:748)


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

Error Message:
16 threads leaked from SUITE scope at org.apache.solr.cloud.ZkFailoverTest:     
1) Thread[id=27073, name=NIOWorkerThread-7, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    2) Thread[id=27065, 
name=NIOWorkerThread-5, state=WAITING, group=TGRP-ZkFailoverTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    3) Thread[id=27075, 
name=NIOWorkerThread-8, state=WAITING, group=TGRP-ZkFailoverTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    4) Thread[id=27067, 
name=SyncThread:0, state=WAITING, group=TGRP-ZkFailoverTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
org.apache.zookeeper.server.SyncRequestProcessor.run(SyncRequestProcessor.java:170)
    5) Thread[id=27072, name=NIOWorkerThread-6, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    6) Thread[id=27068, 
name=ProcessThread(sid:0 cport:33905):, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.java:140)
    7) Thread[id=27066, name=SessionTracker, state=TIMED_WAITING, 
group=TGRP-ZkFailoverTest]         at java.lang.Thread.sleep(Native Method)     
    at 
org.apache.zookeeper.server.SessionTrackerImpl.run(SessionTrackerImpl.java:157) 
   8) Thread[id=27055, name=ZkTestServer Run Thread, state=WAITING, 
group=TGRP-ZkFailoverTest]         at java.lang.Object.wait(Native Method)      
   at java.lang.Thread.join(Thread.java:1252)         at 
java.lang.Thread.join(Thread.java:1326)         at 
org.apache.zookeeper.server.NIOServerCnxnFactory.join(NIOServerCnxnFactory.java:929)
         at 
org.apache.solr.cloud.ZkTestServer$ZKServerMain.runFromConfig(ZkTestServer.java:349)
         at org.apache.solr.cloud.ZkTestServer$2.run(ZkTestServer.java:580)    
9) Thread[id=27069, name=RequestThrottler, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
org.apache.zookeeper.server.RequestThrottler.run(RequestThrottler.java:139)   
10) Thread[id=27062, name=NIOWorkerThread-4, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   11) Thread[id=27057, 
name=NIOServerCxnFactory.SelectorThread-0, state=RUNNABLE, 
group=TGRP-ZkFailoverTest]         at 
sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)         at 
sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)         at 
sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)         at 
sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:417)
         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:382)
   12) Thread[id=27059, name=NIOWorkerThread-1, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   13) Thread[id=27056, 
name=ConnnectionExpirer, state=TIMED_WAITING, group=TGRP-ZkFailoverTest]        
 at java.lang.Thread.sleep(Native Method)         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$ConnectionExpirerThread.run(NIOServerCnxnFactory.java:568)
   14) Thread[id=27060, name=NIOWorkerThread-2, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)   15) Thread[id=27058, 
name=NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:33905, state=RUNNABLE, 
group=TGRP-ZkFailoverTest]         at 
sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)         at 
sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)         at 
sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)         at 
sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.select(NIOServerCnxnFactory.java:219)
         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.run(NIOServerCnxnFactory.java:195)
   16) Thread[id=27061, name=NIOWorkerThread-3, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)

Stack Trace:
com.carrotsearch.randomizedtesting.ThreadLeakError: 16 threads leaked from 
SUITE scope at org.apache.solr.cloud.ZkFailoverTest: 
   1) Thread[id=27073, name=NIOWorkerThread-7, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   2) Thread[id=27065, name=NIOWorkerThread-5, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   3) Thread[id=27075, name=NIOWorkerThread-8, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   4) Thread[id=27067, name=SyncThread:0, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
org.apache.zookeeper.server.SyncRequestProcessor.run(SyncRequestProcessor.java:170)
   5) Thread[id=27072, name=NIOWorkerThread-6, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   6) Thread[id=27068, name=ProcessThread(sid:0 cport:33905):, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.java:140)
   7) Thread[id=27066, name=SessionTracker, state=TIMED_WAITING, 
group=TGRP-ZkFailoverTest]
        at java.lang.Thread.sleep(Native Method)
        at 
org.apache.zookeeper.server.SessionTrackerImpl.run(SessionTrackerImpl.java:157)
   8) Thread[id=27055, name=ZkTestServer Run Thread, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at java.lang.Object.wait(Native Method)
        at java.lang.Thread.join(Thread.java:1252)
        at java.lang.Thread.join(Thread.java:1326)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory.join(NIOServerCnxnFactory.java:929)
        at 
org.apache.solr.cloud.ZkTestServer$ZKServerMain.runFromConfig(ZkTestServer.java:349)
        at org.apache.solr.cloud.ZkTestServer$2.run(ZkTestServer.java:580)
   9) Thread[id=27069, name=RequestThrottler, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
org.apache.zookeeper.server.RequestThrottler.run(RequestThrottler.java:139)
  10) Thread[id=27062, name=NIOWorkerThread-4, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  11) Thread[id=27057, name=NIOServerCxnFactory.SelectorThread-0, 
state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:417)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:382)
  12) Thread[id=27059, name=NIOWorkerThread-1, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  13) Thread[id=27056, name=ConnnectionExpirer, state=TIMED_WAITING, 
group=TGRP-ZkFailoverTest]
        at java.lang.Thread.sleep(Native Method)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory$ConnectionExpirerThread.run(NIOServerCnxnFactory.java:568)
  14) Thread[id=27060, name=NIOWorkerThread-2, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
  15) Thread[id=27058, 
name=NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:33905, state=RUNNABLE, 
group=TGRP-ZkFailoverTest]
        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.select(NIOServerCnxnFactory.java:219)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.run(NIOServerCnxnFactory.java:195)
  16) Thread[id=27061, name=NIOWorkerThread-3, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
        at __randomizedtesting.SeedInfo.seed([C9CBAD31F629727E]:0)


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

Error Message:
There are still zombie threads that couldn't be terminated:    1) 
Thread[id=27073, name=NIOWorkerThread-7, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    2) Thread[id=27065, 
name=NIOWorkerThread-5, state=WAITING, group=TGRP-ZkFailoverTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    3) Thread[id=27075, 
name=NIOWorkerThread-8, state=WAITING, group=TGRP-ZkFailoverTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    4) Thread[id=27062, 
name=NIOWorkerThread-4, state=WAITING, group=TGRP-ZkFailoverTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    5) Thread[id=27057, 
name=NIOServerCxnFactory.SelectorThread-0, state=RUNNABLE, 
group=TGRP-ZkFailoverTest]         at 
sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)         at 
sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)         at 
sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)         at 
sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:417)
         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:382)
    6) Thread[id=27072, name=NIOWorkerThread-6, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    7) Thread[id=27059, 
name=NIOWorkerThread-1, state=WAITING, group=TGRP-ZkFailoverTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    8) Thread[id=27060, 
name=NIOWorkerThread-2, state=WAITING, group=TGRP-ZkFailoverTest]         at 
sun.misc.Unsafe.park(Native Method)         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)    9) Thread[id=27058, 
name=NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:33905, state=RUNNABLE, 
group=TGRP-ZkFailoverTest]         at 
sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)         at 
sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)         at 
sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)         at 
sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.select(NIOServerCnxnFactory.java:219)
         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.run(NIOServerCnxnFactory.java:195)
   10) Thread[id=27061, name=NIOWorkerThread-3, state=WAITING, 
group=TGRP-ZkFailoverTest]         at sun.misc.Unsafe.park(Native Method)       
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)         
at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)     
    at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)   
      at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) 
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
        at java.lang.Thread.run(Thread.java:748)

Stack Trace:
com.carrotsearch.randomizedtesting.ThreadLeakError: There are still zombie 
threads that couldn't be terminated:
   1) Thread[id=27073, name=NIOWorkerThread-7, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   2) Thread[id=27065, name=NIOWorkerThread-5, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   3) Thread[id=27075, name=NIOWorkerThread-8, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   4) Thread[id=27062, name=NIOWorkerThread-4, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   5) Thread[id=27057, name=NIOServerCxnFactory.SelectorThread-0, 
state=RUNNABLE, group=TGRP-ZkFailoverTest]
        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:417)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:382)
   6) Thread[id=27072, name=NIOWorkerThread-6, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   7) Thread[id=27059, name=NIOWorkerThread-1, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   8) Thread[id=27060, name=NIOWorkerThread-2, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   9) Thread[id=27058, 
name=NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:33905, state=RUNNABLE, 
group=TGRP-ZkFailoverTest]
        at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
        at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
        at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
        at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.select(NIOServerCnxnFactory.java:219)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.run(NIOServerCnxnFactory.java:195)
  10) Thread[id=27061, name=NIOWorkerThread-3, state=WAITING, 
group=TGRP-ZkFailoverTest]
        at sun.misc.Unsafe.park(Native Method)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
        at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
        at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
        at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
        at __randomizedtesting.SeedInfo.seed([C9CBAD31F629727E]:0)




Build Log:
[...truncated 15241 lines...]
   [junit4] Suite: org.apache.solr.cloud.UnloadDistributedZkTest
   [junit4]   2> 1794738 INFO  
(SUITE-UnloadDistributedZkTest-seed#[C9CBAD31F629727E]-worker) [     ] 
o.a.s.SolrTestCase Setting 'solr.default.confdir' system property to 
test-framework derived value of 
'/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/server/solr/configsets/_default/conf'
   [junit4]   2> 1794738 INFO  
(SUITE-UnloadDistributedZkTest-seed#[C9CBAD31F629727E]-worker) [     ] 
o.a.s.SolrTestCaseJ4 Created dataDir: 
/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/data-dir-149-001
   [junit4]   2> 1794739 WARN  
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o.e.j.s.Server jetty-9.4.34.v20201102; built: 2020-11-02T14:15:39.302Z; git: 
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{solr.data.dir=/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/tempDir-001/control/data,
 replicaType=NRT, hostContext=/, hostPort=33773, 
coreRootDirectory=/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/control-001/cores}
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authentication=disabled authorization=disabled.  Solr is only as secure as you 
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to users internal or external.  See https://s.apache.org/solrsecurity for more 
info
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x:control_collection_shard1_replica_n1 ] o.a.s.h.a.CoreAdminOperation core 
create command 
qt=/admin/cores&collection.configName=conf1&newCollection=true&name=control_collection_shard1_replica_n1&action=CREATE&numShards=1&collection=control_collection&shard=shard1&wt=javabin&version=2&replicaType=NRT
   [junit4]   2> 1796638 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_    
x:control_collection_shard1_replica_n1 ] o.a.s.c.TransientSolrCoreCacheDefault 
Allocating transient cache for 4 transient cores
   [junit4]   2> 1797651 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.SolrConfig Using Lucene MatchVersion: 8.9.0
   [junit4]   2> 1797673 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.s.IndexSchema Schema name=test
   [junit4]   2> 1797682 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.s.IndexSchema Loaded schema test/1.0 with uniqueid field id
   [junit4]   2> 1797702 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.CoreContainer Creating SolrCore 'control_collection_shard1_replica_n1' 
using configuration from configset conf1, trusted=true
   [junit4]   2> 1797702 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.m.r.SolrJmxReporter JMX monitoring for 
'solr.core.control_collection.shard1.replica_n1' (registry 
'solr.core.control_collection.shard1.replica_n1') enabled at server: 
com.sun.jmx.mbeanserver.JmxMBeanServer@9b4b7e8
   [junit4]   2> 1797702 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.SolrCore [[control_collection_shard1_replica_n1] ] Opening new SolrCore 
at 
[/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/control-001/cores/control_collection_shard1_replica_n1],
 
dataDir=[/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/control-001/cores/control_collection_shard1_replica_n1/data/]
   [junit4]   2> 1797704 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.u.RandomMergePolicy RandomMergePolicy wrapping class 
org.apache.lucene.index.TieredMergePolicy: [TieredMergePolicy: 
maxMergeAtOnce=39, maxMergeAtOnceExplicit=30, maxMergedSegmentMB=96.4404296875, 
floorSegmentMB=2.1611328125, forceMergeDeletesPctAllowed=20.337564360528138, 
segmentsPerTier=21.0, maxCFSSegmentSizeMB=8.796093022207999E12, noCFSRatio=1.0, 
deletesPctAllowed=31.39799251528092
   [junit4]   2> 1797706 WARN  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.RequestHandlers INVALID paramSet a in requestHandler {type = 
requestHandler,name = /dump,class = DumpRequestHandler,attributes = 
{initParams=a, name=/dump, class=DumpRequestHandler},args = 
{defaults={a=A,b=B}}}
   [junit4]   2> 1797747 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.u.UpdateHandler Using UpdateLog implementation: 
org.apache.solr.update.UpdateLog
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c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.u.UpdateLog Initializing UpdateLog: dataDir= defaultSyncLevel=FLUSH 
numRecordsToKeep=100 maxNumLogsToKeep=10 numVersionBuckets=65536
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c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.u.CommitTracker Hard AutoCommit: disabled
   [junit4]   2> 1797748 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.u.CommitTracker Soft AutoCommit: disabled
   [junit4]   2> 1797749 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.u.RandomMergePolicy RandomMergePolicy wrapping class 
org.apache.lucene.index.LogDocMergePolicy: [LogDocMergePolicy: 
minMergeSize=1000, mergeFactor=26, maxMergeSize=9223372036854775807, 
maxMergeSizeForForcedMerge=9223372036854775807, calibrateSizeByDeletes=false, 
maxMergeDocs=2147483647, maxCFSSegmentSizeMB=8.796093022207999E12, 
noCFSRatio=0.3907690955246189]
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c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.r.ManagedResourceStorage Configured ZooKeeperStorageIO with znodeBase: 
/configs/conf1
   [junit4]   2> 1797751 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.r.ManagedResourceStorage Loaded null at path _rest_managed.json using 
ZooKeeperStorageIO:path=/configs/conf1
   [junit4]   2> 1797751 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.h.ReplicationHandler Commits will be reserved for 10000 ms
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c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.u.UpdateLog Could not find max version in index or recent updates, using 
new clock 1696333963345264640
   [junit4]   2> 1797756 INFO  
(searcherExecutor-17693-thread-1-processing-n:127.0.0.1:33773_ 
x:control_collection_shard1_replica_n1 c:control_collection s:shard1) 
[n:127.0.0.1:33773_ c:control_collection s:shard1  
x:control_collection_shard1_replica_n1 ] o.a.s.c.SolrCore 
[control_collection_shard1_replica_n1]  Registered new searcher autowarm time: 
0 ms
   [junit4]   2> 1797757 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.ZkShardTerms Successful update of terms at 
/collections/control_collection/terms/shard1 to Terms{values={core_node2=0}, 
version=0}
   [junit4]   2> 1797757 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.ShardLeaderElectionContextBase make sure parent is created 
/collections/control_collection/leaders/shard1
   [junit4]   2> 1797760 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.ShardLeaderElectionContext Enough replicas found to continue.
   [junit4]   2> 1797760 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.ShardLeaderElectionContext I may be the new leader - try and sync
   [junit4]   2> 1797760 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.SyncStrategy Sync replicas to 
http://127.0.0.1:33773/control_collection_shard1_replica_n1/
   [junit4]   2> 1797760 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.SyncStrategy Sync Success - now sync replicas to me
   [junit4]   2> 1797761 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.SyncStrategy 
http://127.0.0.1:33773/control_collection_shard1_replica_n1/ has no replicas
   [junit4]   2> 1797761 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.ShardLeaderElectionContextBase Creating leader registration node 
/collections/control_collection/leaders/shard1/leader after winning as 
/collections/control_collection/leader_elect/shard1/election/73289429885321220-core_node2-n_0000000000
   [junit4]   2> 1797763 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.ShardLeaderElectionContext I am the new leader: 
http://127.0.0.1:33773/control_collection_shard1_replica_n1/ shard1
   [junit4]   2> 1797864 INFO  (zkCallback-17673-thread-1) [     ] 
o.a.s.c.c.ZkStateReader A cluster state change: [WatchedEvent 
state:SyncConnected type:NodeDataChanged 
path:/collections/control_collection/state.json] for collection 
[control_collection] has occurred - updating... (live nodes size: [1])
   [junit4]   2> 1797864 INFO  (zkCallback-17673-thread-2) [     ] 
o.a.s.c.c.ZkStateReader A cluster state change: [WatchedEvent 
state:SyncConnected type:NodeDataChanged 
path:/collections/control_collection/state.json] for collection 
[control_collection] has occurred - updating... (live nodes size: [1])
   [junit4]   2> 1797865 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_ 
c:control_collection s:shard1  x:control_collection_shard1_replica_n1 ] 
o.a.s.c.ZkController I am the leader, no recovery necessary
   [junit4]   2> 1797869 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_     ] 
o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/cores 
params={qt=/admin/cores&collection.configName=conf1&newCollection=true&name=control_collection_shard1_replica_n1&action=CREATE&numShards=1&collection=control_collection&shard=shard1&wt=javabin&version=2&replicaType=NRT}
 status=0 QTime=1231
   [junit4]   2> 1797871 INFO  (qtp1120492167-32323) [n:127.0.0.1:33773_     ] 
o.a.s.h.a.CollectionsHandler Wait for new collection to be active for at most 
45 seconds. Check all shard replicas
   [junit4]   2> 1797968 INFO  (zkCallback-17673-thread-1) [     ] 
o.a.s.c.c.ZkStateReader A cluster state change: [WatchedEvent 
state:SyncConnected type:NodeDataChanged 
path:/collections/control_collection/state.json] for collection 
[control_collection] has occurred - updating... (live nodes size: [1])
   [junit4]   2> 1797969 INFO  (zkCallback-17673-thread-3) [     ] 
o.a.s.c.c.ZkStateReader A cluster state change: [WatchedEvent 
state:SyncConnected type:NodeDataChanged 
path:/collections/control_collection/state.json] for collection 
[control_collection] has occurred - updating... (live nodes size: [1])
   [junit4]   2> 1797969 INFO  (zkCallback-17673-thread-2) [     ] 
o.a.s.c.c.ZkStateReader A cluster state change: [WatchedEvent 
state:SyncConnected type:NodeDataChanged 
path:/collections/control_collection/state.json] for collection 
[control_collection] has occurred - updating... (live nodes size: [1])
   [junit4]   2> 1797969 INFO  (qtp1120492167-32323) [n:127.0.0.1:33773_     ] 
o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/collections 
params={collection.configName=conf1&name=control_collection&nrtReplicas=1&action=CREATE&numShards=1&createNodeSet=127.0.0.1:33773_&wt=javabin&version=2}
 status=0 QTime=1622
   [junit4]   2> 1797970 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.AbstractFullDistribZkTestBase Waiting to see 1 active replicas in 
collection: control_collection
   [junit4]   2> 1797973 WARN  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]-SendThread(127.0.0.1:37287))
 [     ] o.a.z.ClientCnxn An exception was thrown while closing send thread for 
session 0x1046059221b0005.
   [junit4]   2>           => EndOfStreamException: Unable to read additional 
data from server sessionid 0x1046059221b0005, likely server has closed socket
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77)
   [junit4]   2> org.apache.zookeeper.ClientCnxn$EndOfStreamException: Unable 
to read additional data from server sessionid 0x1046059221b0005, likely server 
has closed socket
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77) 
~[zookeeper-3.6.2.jar:3.6.2]
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
 ~[zookeeper-3.6.2.jar:3.6.2]
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1275) 
[zookeeper-3.6.2.jar:3.6.2]
   [junit4]   2> 1798075 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.c.ConnectionManager Waiting for client to connect to ZooKeeper
   [junit4]   2> 1798078 INFO  (zkConnectionManagerCallback-17702-thread-1) [   
  ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 1798079 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.c.ConnectionManager Client is connected to ZooKeeper
   [junit4]   2> 1798079 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1798080 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.s.i.ZkClientClusterStateProvider Cluster at 127.0.0.1:37287/solr ready
   [junit4]   2> 1798080 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.ChaosMonkey monkey: init - expire sessions:false cause connection 
loss:false
   [junit4]   2> 1798083 INFO  
(OverseerThreadFactory-17681-thread-2-processing-n:127.0.0.1:33773_) 
[n:127.0.0.1:33773_     ] o.a.s.c.a.c.CreateCollectionCmd Create collection 
collection1
   [junit4]   2> 1798084 INFO  
(OverseerCollectionConfigSetProcessor-73289429885321220-127.0.0.1:33773_-n_0000000000)
 [n:127.0.0.1:33773_     ] o.a.s.c.OverseerTaskQueue Response ZK path: 
/overseer/collection-queue-work/qnr-0000000000 doesn't exist. Requestor may 
have disconnected from ZooKeeper
   [junit4]   2> 1798287 WARN  
(OverseerThreadFactory-17681-thread-2-processing-n:127.0.0.1:33773_) 
[n:127.0.0.1:33773_     ] o.a.s.c.a.c.CreateCollectionCmd It is unusual to 
create a collection (collection1) without cores.
   [junit4]   2> 1798288 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_     ] 
o.a.s.h.a.CollectionsHandler Wait for new collection to be active for at most 
45 seconds. Check all shard replicas
   [junit4]   2> 1798291 INFO  (qtp1120492167-32325) [n:127.0.0.1:33773_     ] 
o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/collections 
params={collection.configName=conf1&name=collection1&nrtReplicas=1&action=CREATE&numShards=2&createNodeSet=&stateFormat=2&wt=javabin&version=2}
 status=0 QTime=209
   [junit4]   2> 1798292 INFO  (watches-17699-thread-1) [     ] 
o.a.s.c.SolrCloudTestCase active slice count: 2 expected: 2
   [junit4]   2> 1798292 INFO  (watches-17699-thread-1) [     ] 
o.a.s.c.SolrCloudTestCase active replica count: 0 expected replica count: 0
   [junit4]   2> 1798293 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.SolrCloudTestCase active slice count: 2 expected: 2
   [junit4]   2> 1798293 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.SolrCloudTestCase active replica count: 0 expected replica count: 0
   [junit4]   2> 1798293 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.SolrCloudTestCase active slice count: 2 expected: 2
   [junit4]   2> 1798293 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.SolrCloudTestCase active replica count: 0 expected replica count: 0
   [junit4]   2> 1798293 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.SolrCloudTestCase active slice count: 2 expected: 2
   [junit4]   2> 1798293 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.SolrCloudTestCase active replica count: 0 expected replica count: 0
   [junit4]   2> 1798293 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.AbstractFullDistribZkTestBase Creating jetty instances 
pullReplicaCount=0 numOtherReplicas=4
   [junit4]   2> 1798395 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.AbstractFullDistribZkTestBase create jetty 1 in directory 
/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/shard-1-001
 of type NRT for shard2
   [junit4]   2> 1798395 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.c.s.e.JettySolrRunner Start Jetty (configured port=0, binding port=0)
   [junit4]   2> 1798395 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.c.s.e.JettySolrRunner Trying to start Jetty on port 0 try number 2 ...
   [junit4]   2> 1798395 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.e.j.s.Server jetty-9.4.34.v20201102; built: 2020-11-02T14:15:39.302Z; git: 
e46af88704a893fc12cb0e3bf46e2c7b48a009e7; jvm 1.8.0_281-b09
   [junit4]   2> 1798401 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.e.j.s.session DefaultSessionIdManager workerName=node0
   [junit4]   2> 1798401 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.e.j.s.session No SessionScavenger set, using defaults
   [junit4]   2> 1798401 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.e.j.s.session node0 Scavenging every 660000ms
   [junit4]   2> 1798401 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.e.j.s.h.ContextHandler Started 
o.e.j.s.ServletContextHandler@57443d1e{/,null,AVAILABLE}
   [junit4]   2> 1798402 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.e.j.s.AbstractConnector Started ServerConnector@212c4bd1{HTTP/1.1, (http/1.1, 
h2c)}{127.0.0.1:43657}
   [junit4]   2> 1798402 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.e.j.s.Server Started @1798435ms
   [junit4]   2> 1798402 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.c.s.e.JettySolrRunner Jetty properties: 
{solr.data.dir=/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/tempDir-001/jetty1,
 replicaType=NRT, solrconfig=solrconfig.xml, hostContext=/, hostPort=43657, 
coreRootDirectory=/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/shard-1-001/cores}
   [junit4]   2> 1798402 ERROR (closeThreadPool-17703-thread-1) [     ] 
o.a.s.u.StartupLoggingUtils Missing Java Option solr.log.dir. Logging may be 
missing or incomplete.
   [junit4]   2> 1798402 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.s.SolrDispatchFilter Using logger factory 
org.apache.logging.slf4j.Log4jLoggerFactory
   [junit4]   2> 1798402 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.s.SolrDispatchFilter  ___      _       Welcome to Apache Solr? version 
8.9.0
   [junit4]   2> 1798402 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.s.SolrDispatchFilter / __| ___| |_ _   Starting in cloud mode on port null
   [junit4]   2> 1798402 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.s.SolrDispatchFilter \__ \/ _ \ | '_|  Install dir: 
/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr
   [junit4]   2> 1798402 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.s.SolrDispatchFilter |___/\___/_|_|    Start time: 
2021-04-06T23:02:13.541Z
   [junit4]   2> 1798403 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.c.c.ConnectionManager Waiting for client to connect to ZooKeeper
   [junit4]   2> 1798404 INFO  (zkConnectionManagerCallback-17705-thread-1) [   
  ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 1798404 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.c.c.ConnectionManager Client is connected to ZooKeeper
   [junit4]   2> 1798404 WARN  
(closeThreadPool-17703-thread-1-SendThread(127.0.0.1:37287)) [     ] 
o.a.z.ClientCnxn An exception was thrown while closing send thread for session 
0x1046059221b0007.
   [junit4]   2>           => EndOfStreamException: Unable to read additional 
data from server sessionid 0x1046059221b0007, likely server has closed socket
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77)
   [junit4]   2> org.apache.zookeeper.ClientCnxn$EndOfStreamException: Unable 
to read additional data from server sessionid 0x1046059221b0007, likely server 
has closed socket
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doIO(ClientCnxnSocketNIO.java:77) 
~[zookeeper-3.6.2.jar:3.6.2]
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
 ~[zookeeper-3.6.2.jar:3.6.2]
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1275) 
[zookeeper-3.6.2.jar:3.6.2]
   [junit4]   2> 1798496 INFO  
(TEST-UnloadDistributedZkTest.test-seed#[C9CBAD31F629727E]) [     ] 
o.a.s.c.AbstractFullDistribZkTestBase create jetty 2 in directory 
/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/shard-2-001
 of type NRT for shard1
   [junit4]   2> 1798496 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.a.s.c.s.e.JettySolrRunner Start Jetty (configured port=0, binding port=0)
   [junit4]   2> 1798497 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.a.s.c.s.e.JettySolrRunner Trying to start Jetty on port 0 try number 2 ...
   [junit4]   2> 1798497 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.e.j.s.Server jetty-9.4.34.v20201102; built: 2020-11-02T14:15:39.302Z; git: 
e46af88704a893fc12cb0e3bf46e2c7b48a009e7; jvm 1.8.0_281-b09
   [junit4]   2> 1798505 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.s.SolrDispatchFilter Loading solr.xml from SolrHome (not found in 
ZooKeeper)
   [junit4]   2> 1798505 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.c.SolrXmlConfig Loading container configuration from 
/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/shard-1-001/solr.xml
   [junit4]   2> 1798507 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.e.j.s.session DefaultSessionIdManager workerName=node0
   [junit4]   2> 1798507 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.e.j.s.session No SessionScavenger set, using defaults
   [junit4]   2> 1798507 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.e.j.s.session node0 Scavenging every 660000ms
   [junit4]   2> 1798507 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.c.SolrXmlConfig Configuration parameter autoReplicaFailoverWorkLoopDelay 
is ignored
   [junit4]   2> 1798507 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.c.SolrXmlConfig Configuration parameter 
autoReplicaFailoverBadNodeExpiration is ignored
   [junit4]   2> 1798507 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.e.j.s.h.ContextHandler Started 
o.e.j.s.ServletContextHandler@699724fa{/,null,AVAILABLE}
   [junit4]   2> 1798508 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.e.j.s.AbstractConnector Started ServerConnector@75e77cbe{HTTP/1.1, (http/1.1, 
h2c)}{127.0.0.1:35473}
   [junit4]   2> 1798508 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.e.j.s.Server Started @1798541ms
   [junit4]   2> 1798508 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.a.s.c.s.e.JettySolrRunner Jetty properties: 
{solr.data.dir=/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/tempDir-001/jetty2,
 replicaType=NRT, solrconfig=solrconfig.xml, hostContext=/, hostPort=35473, 
coreRootDirectory=/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr/build/solr-core/test/J2/temp/solr.cloud.UnloadDistributedZkTest_C9CBAD31F629727E-001/shard-2-001/cores}
   [junit4]   2> 1798508 ERROR (closeThreadPool-17703-thread-2) [     ] 
o.a.s.u.StartupLoggingUtils Missing Java Option solr.log.dir. Logging may be 
missing or incomplete.
   [junit4]   2> 1798508 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.a.s.s.SolrDispatchFilter Using logger factory 
org.apache.logging.slf4j.Log4jLoggerFactory
   [junit4]   2> 1798508 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.a.s.s.SolrDispatchFilter  ___      _       Welcome to Apache Solr? version 
8.9.0
   [junit4]   2> 1798508 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.a.s.s.SolrDispatchFilter / __| ___| |_ _   Starting in cloud mode on port null
   [junit4]   2> 1798508 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.a.s.s.SolrDispatchFilter \__ \/ _ \ | '_|  Install dir: 
/home/jenkins/jenkins-slave/workspace/Lucene/Lucene-Solr-Tests-8.x/solr
   [junit4]   2> 1798508 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.a.s.s.SolrDispatchFilter |___/\___/_|_|    Start time: 
2021-04-06T23:02:13.647Z
   [junit4]   2> 1798509 INFO  (closeThreadPool-17703-thread-1) [     ] 
o.a.s.c.SolrXmlConfig MBean server found: 
com.sun.jmx.mbeanserver.JmxMBeanServer@9b4b7e8, but no JMX reporters were 
configured - adding default JMX reporter.
   [junit4]   2> 1798509 INFO  (closeThreadPool-17703-thread-2) [     ] 
o.a.s.c.c.ConnectionManager Waiting for client to connect to ZooKeeper
   [junit4]   2> 1798509 INFO  (zkConnectionManagerCallback-17707-thread-1) [   
  ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 17985

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

oncurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
   [junit4]    >         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([C9CBAD31F629727E]:0)Throwable #2: 
com.carrotsearch.randomizedtesting.ThreadLeakError: There are still zombie 
threads that couldn't be terminated:
   [junit4]    >    1) Thread[id=27073, name=NIOWorkerThread-7, state=WAITING, 
group=TGRP-ZkFailoverTest]
   [junit4]    >         at sun.misc.Unsafe.park(Native Method)
   [junit4]    >         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
   [junit4]    >         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
   [junit4]    >         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    >    2) Thread[id=27065, name=NIOWorkerThread-5, state=WAITING, 
group=TGRP-ZkFailoverTest]
   [junit4]    >         at sun.misc.Unsafe.park(Native Method)
   [junit4]    >         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
   [junit4]    >         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
   [junit4]    >         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    >    3) Thread[id=27075, name=NIOWorkerThread-8, state=WAITING, 
group=TGRP-ZkFailoverTest]
   [junit4]    >         at sun.misc.Unsafe.park(Native Method)
   [junit4]    >         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
   [junit4]    >         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
   [junit4]    >         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    >    4) Thread[id=27062, name=NIOWorkerThread-4, state=WAITING, 
group=TGRP-ZkFailoverTest]
   [junit4]    >         at sun.misc.Unsafe.park(Native Method)
   [junit4]    >         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
   [junit4]    >         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
   [junit4]    >         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    >    5) Thread[id=27057, 
name=NIOServerCxnFactory.SelectorThread-0, state=RUNNABLE, 
group=TGRP-ZkFailoverTest]
   [junit4]    >         at sun.nio.ch.EPollArrayWrapper.epollWait(Native 
Method)
   [junit4]    >         at 
sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
   [junit4]    >         at 
sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
   [junit4]    >         at 
sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
   [junit4]    >         at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
   [junit4]    >         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
   [junit4]    >         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.select(NIOServerCnxnFactory.java:417)
   [junit4]    >         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$SelectorThread.run(NIOServerCnxnFactory.java:382)
   [junit4]    >    6) Thread[id=27072, name=NIOWorkerThread-6, state=WAITING, 
group=TGRP-ZkFailoverTest]
   [junit4]    >         at sun.misc.Unsafe.park(Native Method)
   [junit4]    >         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
   [junit4]    >         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
   [junit4]    >         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    >    7) Thread[id=27059, name=NIOWorkerThread-1, state=WAITING, 
group=TGRP-ZkFailoverTest]
   [junit4]    >         at sun.misc.Unsafe.park(Native Method)
   [junit4]    >         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
   [junit4]    >         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
   [junit4]    >         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    >    8) Thread[id=27060, name=NIOWorkerThread-2, state=WAITING, 
group=TGRP-ZkFailoverTest]
   [junit4]    >         at sun.misc.Unsafe.park(Native Method)
   [junit4]    >         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
   [junit4]    >         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
   [junit4]    >         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    >    9) Thread[id=27058, 
name=NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:33905, state=RUNNABLE, 
group=TGRP-ZkFailoverTest]
   [junit4]    >         at sun.nio.ch.EPollArrayWrapper.epollWait(Native 
Method)
   [junit4]    >         at 
sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
   [junit4]    >         at 
sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
   [junit4]    >         at 
sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
   [junit4]    >         at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
   [junit4]    >         at 
sun.nio.ch.SelectorImpl.select(SelectorImpl.java:101)
   [junit4]    >         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.select(NIOServerCnxnFactory.java:219)
   [junit4]    >         at 
org.apache.zookeeper.server.NIOServerCnxnFactory$AcceptThread.run(NIOServerCnxnFactory.java:195)
   [junit4]    >   10) Thread[id=27061, name=NIOWorkerThread-3, state=WAITING, 
group=TGRP-ZkFailoverTest]
   [junit4]    >         at sun.misc.Unsafe.park(Native Method)
   [junit4]    >         at 
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
   [junit4]    >         at 
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
   [junit4]    >         at 
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
   [junit4]    >         at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    >        at 
__randomizedtesting.SeedInfo.seed([C9CBAD31F629727E]:0)
   [junit4] Completed [595/936 (2!)] on J3 in 95.06s, 1 test, 1 failure, 2 
errors <<< FAILURES!

[...truncated 51898 lines...]
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