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From Apache Jenkins Server <jenk...@builds.apache.org>
Subject [JENKINS] Lucene-Solr-Tests-7.3 - Build # 55 - Still Unstable
Date Wed, 02 May 2018 04:37:44 GMT
Build: https://builds.apache.org/job/Lucene-Solr-Tests-7.3/55/

3 tests failed.
FAILED:  junit.framework.TestSuite.org.apache.solr.cloud.ZkControllerTest

Error Message:
ObjectTracker found 1 object(s) that were not released!!! [Overseer] org.apache.solr.common.util.ObjectReleaseTracker$ObjectTrackerException: org.apache.solr.cloud.Overseer  at org.apache.solr.common.util.ObjectReleaseTracker.track(ObjectReleaseTracker.java:42)  at org.apache.solr.cloud.Overseer.start(Overseer.java:545)  at org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)  at org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)  at org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)  at org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)  at org.apache.solr.cloud.LeaderElector.retryElection(LeaderElector.java:393)  at org.apache.solr.cloud.ZkController.rejoinOverseerElection(ZkController.java:2068)  at org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:331)  at java.lang.Thread.run(Thread.java:748)  

Stack Trace:
java.lang.AssertionError: ObjectTracker found 1 object(s) that were not released!!! [Overseer]
org.apache.solr.common.util.ObjectReleaseTracker$ObjectTrackerException: org.apache.solr.cloud.Overseer
	at org.apache.solr.common.util.ObjectReleaseTracker.track(ObjectReleaseTracker.java:42)
	at org.apache.solr.cloud.Overseer.start(Overseer.java:545)
	at org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
	at org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
	at org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
	at org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
	at org.apache.solr.cloud.LeaderElector.retryElection(LeaderElector.java:393)
	at org.apache.solr.cloud.ZkController.rejoinOverseerElection(ZkController.java:2068)
	at org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:331)
	at java.lang.Thread.run(Thread.java:748)


	at __randomizedtesting.SeedInfo.seed([72D1F10E6BDB34AF]:0)
	at org.junit.Assert.fail(Assert.java:93)
	at org.junit.Assert.assertTrue(Assert.java:43)
	at org.junit.Assert.assertNull(Assert.java:551)
	at org.apache.solr.SolrTestCaseJ4.teardownTestCases(SolrTestCaseJ4.java:301)
	at sun.reflect.GeneratedMethodAccessor48.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1737)
	at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:897)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
	at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:41)
	at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
	at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
	at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
	at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
	at org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:54)
	at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
	at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
	at java.lang.Thread.run(Thread.java:748)


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

Error Message:
1 thread leaked from SUITE scope at org.apache.solr.cloud.ZkControllerTest:     1) Thread[id=18924, name=OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001, state=RUNNABLE, group=Overseer autoscaling triggers]         at sun.nio.cs.UTF_8$Encoder.encodeLoop(UTF_8.java:691)         at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:579)         at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:271)         at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:125)         at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:135)         at java.io.OutputStreamWriter.write(OutputStreamWriter.java:220)         at java.io.Writer.write(Writer.java:157)         at org.apache.log4j.helpers.QuietWriter.write(QuietWriter.java:48)         at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:310)         at org.apache.log4j.WriterAppender.append(WriterAppender.java:162)         at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)         at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)         at org.apache.log4j.Category.callAppenders(Category.java:206)         at org.apache.log4j.Category.forcedLog(Category.java:391)         at org.apache.log4j.Category.log(Category.java:856)         at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:576)         at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:140)         at java.lang.Thread.run(Thread.java:748)

Stack Trace:
com.carrotsearch.randomizedtesting.ThreadLeakError: 1 thread leaked from SUITE scope at org.apache.solr.cloud.ZkControllerTest: 
   1) Thread[id=18924, name=OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001, state=RUNNABLE, group=Overseer autoscaling triggers]
        at sun.nio.cs.UTF_8$Encoder.encodeLoop(UTF_8.java:691)
        at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:579)
        at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:271)
        at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:125)
        at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:135)
        at java.io.OutputStreamWriter.write(OutputStreamWriter.java:220)
        at java.io.Writer.write(Writer.java:157)
        at org.apache.log4j.helpers.QuietWriter.write(QuietWriter.java:48)
        at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:310)
        at org.apache.log4j.WriterAppender.append(WriterAppender.java:162)
        at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
        at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
        at org.apache.log4j.Category.callAppenders(Category.java:206)
        at org.apache.log4j.Category.forcedLog(Category.java:391)
        at org.apache.log4j.Category.log(Category.java:856)
        at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:576)
        at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:140)
        at java.lang.Thread.run(Thread.java:748)
	at __randomizedtesting.SeedInfo.seed([72D1F10E6BDB34AF]:0)


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

Error Message:
There are still zombie threads that couldn't be terminated:    1) Thread[id=18924, name=OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001, state=RUNNABLE, group=Overseer autoscaling triggers]         at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)         at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)         at org.apache.log4j.Category.callAppenders(Category.java:206)         at org.apache.log4j.Category.forcedLog(Category.java:391)         at org.apache.log4j.Category.log(Category.java:856)         at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:576)         at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:140)         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=18924, name=OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001, state=RUNNABLE, group=Overseer autoscaling triggers]
        at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
        at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
        at org.apache.log4j.Category.callAppenders(Category.java:206)
        at org.apache.log4j.Category.forcedLog(Category.java:391)
        at org.apache.log4j.Category.log(Category.java:856)
        at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:576)
        at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:140)
        at java.lang.Thread.run(Thread.java:748)
	at __randomizedtesting.SeedInfo.seed([72D1F10E6BDB34AF]:0)




Build Log:
[...truncated 13441 lines...]
   [junit4] Suite: org.apache.solr.cloud.ZkControllerTest
   [junit4]   2> Creating dataDir: /x1/jenkins/jenkins-slave/workspace/Lucene-Solr-Tests-7.3/solr/build/solr-core/test/J2/temp/solr.cloud.ZkControllerTest_72D1F10E6BDB34AF-001/init-core-data-001
   [junit4]   2> 2189856 WARN  (SUITE-ZkControllerTest-seed#[72D1F10E6BDB34AF]-worker) [    ] o.a.s.SolrTestCaseJ4 startTrackingSearchers: numOpens=23 numCloses=23
   [junit4]   2> 2189856 INFO  (SUITE-ZkControllerTest-seed#[72D1F10E6BDB34AF]-worker) [    ] o.a.s.SolrTestCaseJ4 Using PointFields (NUMERIC_POINTS_SYSPROP=true) w/NUMERIC_DOCVALUES_SYSPROP=false
   [junit4]   2> 2189858 INFO  (SUITE-ZkControllerTest-seed#[72D1F10E6BDB34AF]-worker) [    ] o.a.s.SolrTestCaseJ4 Randomized ssl (false) and clientAuth (false) via: @org.apache.solr.SolrTestCaseJ4$SuppressSSL(bugUrl=None)
   [junit4]   2> 2189858 INFO  (SUITE-ZkControllerTest-seed#[72D1F10E6BDB34AF]-worker) [    ] o.a.s.SolrTestCaseJ4 SecureRandom sanity checks: test.solr.allowed.securerandom=null & java.security.egd=file:/dev/./urandom
   [junit4]   2> 2189860 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [    ] o.a.s.SolrTestCaseJ4 ###Starting testGetHostName
   [junit4]   2> 2189860 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [    ] o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 2189860 INFO  (Thread-5631) [    ] o.a.s.c.ZkTestServer client port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 2189861 INFO  (Thread-5631) [    ] o.a.s.c.ZkTestServer Starting server
   [junit4]   2> 2189862 ERROR (Thread-5631) [    ] o.a.z.s.ZooKeeperServer ZKShutdownHandler is not registered, so ZooKeeper server won't take any action on ERROR or SHUTDOWN server state changes
   [junit4]   2> 2189960 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [    ] o.a.s.c.ZkTestServer start zk server on port:56325
   [junit4]   2> 2189973 INFO  (zkConnectionManagerCallback-5566-thread-1) [    ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2189975 INFO  (zkConnectionManagerCallback-5568-thread-1) [    ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2189989 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [    ] o.a.s.c.SolrXmlConfig MBean server found: com.sun.jmx.mbeanserver.JmxMBeanServer@13ff2b0, but no JMX reporters were configured - adding default JMX reporter.
   [junit4]   2> 2189992 INFO  (zkConnectionManagerCallback-5572-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2190094 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Overseer (id=null) closing
   [junit4]   2> 2190095 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:8983_solr
   [junit4]   2> 2190095 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Overseer (id=73727778065481730-127.0.0.1:8983_solr-n_0000000000) starting
   [junit4]   2> 2191929 INFO  (zkConnectionManagerCallback-5577-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2191932 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.s.i.ZkClientClusterStateProvider Cluster at 127.0.0.1:56325/solr ready
   [junit4]   2> 2191961 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.ZkController Register node as live in ZooKeeper:/live_nodes/127.0.0.1:8983_solr
   [junit4]   2> 2191962 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Overseer (id=73727778065481730-127.0.0.1:8983_solr-n_0000000000) closing
   [junit4]   2> 2191981 INFO  (zkCallback-5571-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 2191990 INFO  (OverseerStateUpdate-73727778065481730-127.0.0.1:8983_solr-n_0000000000) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:8983_solr
   [junit4]   2> 2191990 WARN  (OverseerAutoScalingTriggerThread-73727778065481730-127.0.0.1:8983_solr-n_0000000000) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread OverseerTriggerThread woken up but we are closed, exiting.
   [junit4]   2> 2191991 INFO  (zkCallback-5576-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 2192019 WARN  (OverseerExitThread) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer I'm exiting, but I'm still the leader
   [junit4]   2> 2192019 ERROR (OverseerExitThread) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Could not delete my leader node 
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /overseer_elect/leader
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.delete(ZooKeeper.java:876)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$delete$1(SolrZkClient.java:244)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.delete(SolrZkClient.java:243)
   [junit4]   2> 	at org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:317)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 2192020 WARN  (OverseerExitThread) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Unable to rejoinElection 
   [junit4]   2> org.apache.solr.common.SolrException: Unable to rejoin election
   [junit4]   2> 	at org.apache.solr.cloud.ZkController.rejoinOverseerElection(ZkController.java:2071)
   [junit4]   2> 	at org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:331)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.solr.common.SolrException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /overseer_elect
   [junit4]   2> 	at org.apache.solr.cloud.OverseerElectionContext.<init>(ElectionContext.java:824)
   [junit4]   2> 	at org.apache.solr.cloud.OverseerElectionContext.copy(ElectionContext.java:867)
   [junit4]   2> 	at org.apache.solr.cloud.LeaderElector.retryElection(LeaderElector.java:385)
   [junit4]   2> 	at org.apache.solr.cloud.ZkController.rejoinOverseerElection(ZkController.java:2068)
   [junit4]   2> 	... 2 more
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /overseer_elect
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1105)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:316)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:316)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.ensureExists(ZkCmdExecutor.java:93)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.ensureExists(ZkCmdExecutor.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.OverseerElectionContext.<init>(ElectionContext.java:822)
   [junit4]   2> 	... 5 more
   [junit4]   2> 2193519 WARN  (zkCallback-5571-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ZkStateReader ZooKeeper watch triggered, but Solr cannot talk to ZK: [KeeperErrorCode = Session expired for /live_nodes]
   [junit4]   2> 2193520 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.CoreContainer Shutting down CoreContainer instance=717896000
   [junit4]   2> 2193520 ERROR (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.SolrCores No transient handler has been defined. Check solr.xml to see if an attempt to provide a custom TransientSolrCoreCacheFactory was done incorrectly since the default should have been used otherwise.
   [junit4]   2> 2193520 ERROR (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.z.s.ZooKeeperServer ZKShutdownHandler is not registered, so ZooKeeper server won't take any action on ERROR or SHUTDOWN server state changes
   [junit4]   2> 2193521 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.ZkTestServer connecting to 127.0.0.1:56325 56325
   [junit4]   2> 2193627 INFO  (Thread-5631) [    ] o.a.s.c.ZkTestServer connecting to 127.0.0.1:56325 56325
   [junit4]   2> 2193627 WARN  (Thread-5631) [    ] o.a.s.c.ZkTestServer Watch limit violations: 
   [junit4]   2> Maximum concurrent create/delete watches above limit:
   [junit4]   2> 
   [junit4]   2> 	2	/solr/aliases.json
   [junit4]   2> 	2	/solr/clusterprops.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent data watches above limit:
   [junit4]   2> 
   [junit4]   2> 	2	/solr/clusterstate.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent children watches above limit:
   [junit4]   2> 
   [junit4]   2> 	2	/solr/live_nodes
   [junit4]   2> 	2	/solr/collections
   [junit4]   2> 
   [junit4]   2> 2193627 INFO  (TEST-ZkControllerTest.testGetHostName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.SolrTestCaseJ4 ###Ending testGetHostName
   [junit4]   2> 2193630 INFO  (TEST-ZkControllerTest.testReadConfigName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.SolrTestCaseJ4 ###Starting testReadConfigName
   [junit4]   2> 2193631 INFO  (TEST-ZkControllerTest.testReadConfigName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 2193631 INFO  (Thread-5632) [n:127.0.0.1:8983_solr    ] o.a.s.c.ZkTestServer client port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 2193631 INFO  (Thread-5632) [n:127.0.0.1:8983_solr    ] o.a.s.c.ZkTestServer Starting server
   [junit4]   2> 2193632 ERROR (Thread-5632) [n:127.0.0.1:8983_solr    ] o.a.z.s.ZooKeeperServer ZKShutdownHandler is not registered, so ZooKeeper server won't take any action on ERROR or SHUTDOWN server state changes
   [junit4]   2> 2193731 INFO  (TEST-ZkControllerTest.testReadConfigName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.ZkTestServer start zk server on port:33261
   [junit4]   2> 2193739 INFO  (zkConnectionManagerCallback-5579-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2193742 INFO  (zkConnectionManagerCallback-5581-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2193752 INFO  (zkConnectionManagerCallback-5583-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2193759 INFO  (TEST-ZkControllerTest.testReadConfigName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.SolrXmlConfig MBean server found: com.sun.jmx.mbeanserver.JmxMBeanServer@13ff2b0, but no JMX reporters were configured - adding default JMX reporter.
   [junit4]   2> 2193762 INFO  (zkConnectionManagerCallback-5587-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2193849 INFO  (TEST-ZkControllerTest.testReadConfigName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Overseer (id=null) closing
   [junit4]   2> 2193850 INFO  (TEST-ZkControllerTest.testReadConfigName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:8983_solr
   [junit4]   2> 2193851 INFO  (TEST-ZkControllerTest.testReadConfigName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Overseer (id=73727778312552451-127.0.0.1:8983_solr-n_0000000000) starting
   [junit4]   2> 2193860 INFO  (zkConnectionManagerCallback-5592-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2193866 INFO  (TEST-ZkControllerTest.testReadConfigName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.s.i.ZkClientClusterStateProvider Cluster at 127.0.0.1:33261/solr ready
   [junit4]   2> 2193872 INFO  (TEST-ZkControllerTest.testReadConfigName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.ZkController Register node as live in ZooKeeper:/live_nodes/127.0.0.1:8983_solr
   [junit4]   2> 2193873 INFO  (TEST-ZkControllerTest.testReadConfigName-seed#[72D1F10E6BDB34AF]) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Overseer (id=73727778312552451-127.0.0.1:8983_solr-n_0000000000) closing
   [junit4]   2> 2193875 INFO  (OverseerStateUpdate-73727778312552451-127.0.0.1:8983_solr-n_0000000000) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:8983_solr
   [junit4]   2> 2193876 INFO  (zkCallback-5586-thread-1-processing-n:127.0.0.1:8983_solr) [n:127.0.0.1:8983_solr    ] o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 2193887 WARN  (OverseerExitThread) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer I'm exiting, but I'm still the leader
   [junit4]   2> 2193890 INFO  (OverseerExitThread) [n:127.0.0.1:8983_solr    ] o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:8983_solr
   [junit4]   2> 2193892 INFO  (OverseerExitThread) [n:127.0.0.1:8983_solr    ] o.a.s.c.Overseer Overseer (id=73727778312552451-127.0.0.1:8983_solr-n_0000000001) starting
   [junit4]   2> 2193907 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193908 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193908 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193918 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193918 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193918 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193918 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193919 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193919 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193919 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193920 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193920 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193921 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193921 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193921 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193921 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193922 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193922 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193922 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193922 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193923 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193923 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193924 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193924 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193924 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193930 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193930 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193931 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193931 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193931 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193931 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193932 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193933 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193933 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193933 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193933 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193934 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193934 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193934 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2> 	at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2> 	at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2> 	at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> 2193934 ERROR (OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001) [n:127.0.0.1:8983_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:183)
   [junit4]   2> 	at org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:78)
   [junit4]   2> 	at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:126)
   [junit4]   2> 	at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: Keep

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

)
   [junit4]   2> 	at org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2> 	... 3 more
   [junit4]   2> May 02, 2018 3:53:19 AM com.carrotsearch.randomizedtesting.ThreadLeakControl tryToInterruptAll
   [junit4]   2> SEVERE: There are still zombie threads that couldn't be terminated:
   [junit4]   2>    1) Thread[id=18924, name=OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001, state=RUNNABLE, group=Overseer autoscaling triggers]
   [junit4]   2>         at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
   [junit4]   2>         at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
   [junit4]   2>         at org.apache.log4j.Category.callAppenders(Category.java:206)
   [junit4]   2>         at org.apache.log4j.Category.forcedLog(Category.java:391)
   [junit4]   2>         at org.apache.log4j.Category.log(Category.java:856)
   [junit4]   2>         at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:576)
   [junit4]   2>         at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:140)
   [junit4]   2>         at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> NOTE: test params are: codec=Asserting(Lucene70): {}, docValues:{}, maxPointsInLeafNode=328, maxMBSortInHeap=5.597665473060215, sim=RandomSimilarity(queryNorm=true): {}, locale=et-EE, timezone=Europe/Jersey
   [junit4]   2> NOTE: Linux 3.13.0-88-generic amd64/Oracle Corporation 1.8.0_172 (64-bit)/cpus=4,threads=2,free=211208688,total=536346624
   [junit4]   2> NOTE: All tests run in this JVM: [DeleteLastCustomShardedReplicaTest, TestFieldTypeResource, TestSha256AuthenticationProvider, TestTolerantUpdateProcessorCloud, DistanceUnitsTest, TestBackupRepositoryFactory, FacetPivotSmallTest, HttpTriggerListenerTest, SolrCloudReportersTest, TestUtils, ChangedSchemaMergeTest, HdfsUnloadDistributedZkTest, RegexBoostProcessorTest, CacheHeaderTest, TestCoreContainer, SubstringBytesRefFilterTest, CopyFieldTest, ShowFileRequestHandlerTest, HdfsChaosMonkeyNothingIsSafeTest, ClassificationUpdateProcessorTest, ConfigureRecoveryStrategyTest, TimeRoutedAliasUpdateProcessorTest, AddBlockUpdateTest, TestStressReorder, ConcurrentCreateRoutedAliasTest, TestRandomCollapseQParserPlugin, TestDocBasedVersionConstraints, MigrateRouteKeyTest, TestSimpleTextCodec, SolrMetricsIntegrationTest, TestSolrCloudSnapshots, AnalyticsMergeStrategyTest, LukeRequestHandlerTest, URLClassifyProcessorTest, TestExactSharedStatsCache, CollectionsAPIDistributedZkTest, AddReplicaTest, BlockJoinFacetDistribTest, TestNRTOpen, HDFSCollectionsAPITest, TestUniqueKeyFieldResource, HdfsCollectionsAPIDistributedZkTest, TestCloudSchemaless, TestJettySolrRunner, V2StandaloneTest, TestLFUCache, TestSQLHandler, HLLUtilTest, TestSuggestSpellingConverter, IgnoreCommitOptimizeUpdateProcessorFactoryTest, TestRawResponseWriter, TestMultiWordSynonyms, ExitableDirectoryReaderTest, AtomicUpdatesTest, PingRequestHandlerTest, MoveReplicaHDFSTest, TestUpdate, CustomHighlightComponentTest, TestMiniSolrCloudClusterSSL, BlobRepositoryCloudTest, TestNumericTerms32, ClusterStateUpdateTest, BasicDistributedZk2Test, TestConfigSetProperties, TestRecoveryHdfs, TestClusterStateMutator, TestSolrConfigHandlerConcurrent, TestEmbeddedSolrServerAdminHandler, HdfsSyncSliceTest, TestStressInPlaceUpdates, MinimalSchemaTest, TestCollapseQParserPlugin, TestRandomRequestDistribution, TestStreamBody, TestNumericRangeQuery32, SuggestComponentTest, TestCloudPivotFacet, HdfsLockFactoryTest, SharedFSAutoReplicaFailoverTest, NodeLostTriggerTest, DateMathParserTest, DocValuesMissingTest, StatelessScriptUpdateProcessorFactoryTest, MultiTermTest, TestGraphTermsQParserPlugin, DeleteShardTest, TestCustomDocTransformer, SpellPossibilityIteratorTest, CreateCollectionCleanupTest, SpellCheckComponentTest, ComputePlanActionTest, TestLazyCores, TestCodecSupport, TestOrdValues, TestLocalFSCloudBackupRestore, CdcrBidirectionalTest, AsyncCallRequestStatusResponseTest, TestManagedSynonymGraphFilterFactory, OverseerCollectionConfigSetProcessorTest, TestDistributedMissingSort, SpatialRPTFieldTypeTest, SpatialFilterTest, TestSSLRandomization, PreAnalyzedFieldTest, SolrTestCaseJ4Test, TestQueryTypes, LIRRollingUpdatesTest, CursorMarkTest, BasicAuthIntegrationTest, TestDFISimilarityFactory, TestSubQueryTransformerCrossCore, SolrCmdDistributorTest, CollectionReloadTest, TestLegacyNumericRangeQueryBuilder, TestFieldCacheVsDocValues, TestAnalyzeInfixSuggestions, JavabinLoaderTest, TestExecutePlanAction, CircularListTest, TestCloudSearcherWarming, DirectSolrSpellCheckerTest, ResponseHeaderTest, DistributedFacetExistsSmallTest, TestValueSourceCache, GraphQueryTest, LeaderElectionTest, ZkCLITest, ShardRoutingCustomTest, TestDistributedSearch, DistributedSpellCheckComponentTest, ZkControllerTest]
   [junit4]   2> NOTE: reproduce with: ant test  -Dtestcase=ZkControllerTest -Dtests.seed=72D1F10E6BDB34AF -Dtests.multiplier=2 -Dtests.slow=true -Dtests.locale=et-EE -Dtests.timezone=Europe/Jersey -Dtests.asserts=true -Dtests.file.encoding=UTF-8
   [junit4] ERROR   0.00s J2 | ZkControllerTest (suite) <<<
   [junit4]    > Throwable #1: java.lang.AssertionError: ObjectTracker found 1 object(s) that were not released!!! [Overseer]
   [junit4]    > org.apache.solr.common.util.ObjectReleaseTracker$ObjectTrackerException: org.apache.solr.cloud.Overseer
   [junit4]    > 	at org.apache.solr.common.util.ObjectReleaseTracker.track(ObjectReleaseTracker.java:42)
   [junit4]    > 	at org.apache.solr.cloud.Overseer.start(Overseer.java:545)
   [junit4]    > 	at org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]    > 	at org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]    > 	at org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]    > 	at org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]    > 	at org.apache.solr.cloud.LeaderElector.retryElection(LeaderElector.java:393)
   [junit4]    > 	at org.apache.solr.cloud.ZkController.rejoinOverseerElection(ZkController.java:2068)
   [junit4]    > 	at org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:331)
   [junit4]    > 	at java.lang.Thread.run(Thread.java:748)
   [junit4]    > 	at __randomizedtesting.SeedInfo.seed([72D1F10E6BDB34AF]:0)
   [junit4]    > 	at org.apache.solr.SolrTestCaseJ4.teardownTestCases(SolrTestCaseJ4.java:301)
   [junit4]    > 	at java.lang.Thread.run(Thread.java:748)Throwable #2: com.carrotsearch.randomizedtesting.ThreadLeakError: 1 thread leaked from SUITE scope at org.apache.solr.cloud.ZkControllerTest: 
   [junit4]    >    1) Thread[id=18924, name=OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001, state=RUNNABLE, group=Overseer autoscaling triggers]
   [junit4]    >         at sun.nio.cs.UTF_8$Encoder.encodeLoop(UTF_8.java:691)
   [junit4]    >         at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:579)
   [junit4]    >         at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:271)
   [junit4]    >         at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:125)
   [junit4]    >         at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:135)
   [junit4]    >         at java.io.OutputStreamWriter.write(OutputStreamWriter.java:220)
   [junit4]    >         at java.io.Writer.write(Writer.java:157)
   [junit4]    >         at org.apache.log4j.helpers.QuietWriter.write(QuietWriter.java:48)
   [junit4]    >         at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:310)
   [junit4]    >         at org.apache.log4j.WriterAppender.append(WriterAppender.java:162)
   [junit4]    >         at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
   [junit4]    >         at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
   [junit4]    >         at org.apache.log4j.Category.callAppenders(Category.java:206)
   [junit4]    >         at org.apache.log4j.Category.forcedLog(Category.java:391)
   [junit4]    >         at org.apache.log4j.Category.log(Category.java:856)
   [junit4]    >         at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:576)
   [junit4]    >         at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:140)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    > 	at __randomizedtesting.SeedInfo.seed([72D1F10E6BDB34AF]:0)Throwable #3: com.carrotsearch.randomizedtesting.ThreadLeakError: There are still zombie threads that couldn't be terminated:
   [junit4]    >    1) Thread[id=18924, name=OverseerAutoScalingTriggerThread-73727778312552451-127.0.0.1:8983_solr-n_0000000001, state=RUNNABLE, group=Overseer autoscaling triggers]
   [junit4]    >         at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
   [junit4]    >         at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
   [junit4]    >         at org.apache.log4j.Category.callAppenders(Category.java:206)
   [junit4]    >         at org.apache.log4j.Category.forcedLog(Category.java:391)
   [junit4]    >         at org.apache.log4j.Category.log(Category.java:856)
   [junit4]    >         at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:576)
   [junit4]    >         at org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:140)
   [junit4]    >         at java.lang.Thread.run(Thread.java:748)
   [junit4]    > 	at __randomizedtesting.SeedInfo.seed([72D1F10E6BDB34AF]:0)
   [junit4] Completed [362/783 (1!)] on J2 in 110.98s, 4 tests, 1 failure, 2 errors, 1 skipped <<< FAILURES!

[...truncated 50942 lines...]

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