Build: https://builds.apache.org/job/Lucene-Solr-Tests-7.x/499/

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

Error Message:
ObjectTracker found 1 object(s) that were not released!!! [Overseer] 
org.apache.solr.common.util.ObjectReleaseTracker$ObjectTrackerException: 
org.apache.solr.cloud.Overseer  at 
org.apache.solr.common.util.ObjectReleaseTracker.track(ObjectReleaseTracker.java:42)
  at org.apache.solr.cloud.Overseer.start(Overseer.java:545)  at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
  at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170) 
 at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)  
at org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)  at 
org.apache.solr.cloud.LeaderElector.retryElection(LeaderElector.java:393)  at 
org.apache.solr.cloud.ZkController.rejoinOverseerElection(ZkController.java:2055)
  at 
org.apache.solr.cloud.Overseer$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$ObjectTrackerException: 
org.apache.solr.cloud.Overseer
        at 
org.apache.solr.common.util.ObjectReleaseTracker.track(ObjectReleaseTracker.java:42)
        at org.apache.solr.cloud.Overseer.start(Overseer.java:545)
        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
        at 
org.apache.solr.cloud.LeaderElector.retryElection(LeaderElector.java:393)
        at 
org.apache.solr.cloud.ZkController.rejoinOverseerElection(ZkController.java:2055)
        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:331)
        at java.lang.Thread.run(Thread.java:748)


        at __randomizedtesting.SeedInfo.seed([2CFA622B8CAD3BD1]: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.GeneratedMethodAccessor65.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.TestLeaderElectionZkExpiry

Error Message:
1 thread leaked from SUITE scope at 
org.apache.solr.cloud.TestLeaderElectionZkExpiry:     1) Thread[id=12149, 
name=OverseerAutoScalingTriggerThread-72271990094037003-dummy.host.com:8984_solr-n_0000000008,
 state=RUNNABLE, group=Overseer autoscaling triggers]         at 
java.lang.Throwable.getStackTraceElement(Native Method)         at 
java.lang.Throwable.getOurStackTrace(Throwable.java:827)         at 
java.lang.Throwable.printEnclosedStackTrace(Throwable.java:686)         at 
java.lang.Throwable.printStackTrace(Throwable.java:667)         at 
java.lang.Throwable.printStackTrace(Throwable.java:721)         at 
org.apache.log4j.DefaultThrowableRenderer.render(DefaultThrowableRenderer.java:60)
         at 
org.apache.log4j.spi.ThrowableInformation.getThrowableStrRep(ThrowableInformation.java:87)
         at 
org.apache.log4j.spi.LoggingEvent.getThrowableStrRep(LoggingEvent.java:413)     
    at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:313)       
  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.TestLeaderElectionZkExpiry: 
   1) Thread[id=12149, 
name=OverseerAutoScalingTriggerThread-72271990094037003-dummy.host.com:8984_solr-n_0000000008,
 state=RUNNABLE, group=Overseer autoscaling triggers]
        at java.lang.Throwable.getStackTraceElement(Native Method)
        at java.lang.Throwable.getOurStackTrace(Throwable.java:827)
        at java.lang.Throwable.printEnclosedStackTrace(Throwable.java:686)
        at java.lang.Throwable.printStackTrace(Throwable.java:667)
        at java.lang.Throwable.printStackTrace(Throwable.java:721)
        at 
org.apache.log4j.DefaultThrowableRenderer.render(DefaultThrowableRenderer.java:60)
        at 
org.apache.log4j.spi.ThrowableInformation.getThrowableStrRep(ThrowableInformation.java:87)
        at 
org.apache.log4j.spi.LoggingEvent.getThrowableStrRep(LoggingEvent.java:413)
        at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:313)
        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([2CFA622B8CAD3BD1]:0)


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

Error Message:
There are still zombie threads that couldn't be terminated:    1) 
Thread[id=12149, 
name=OverseerAutoScalingTriggerThread-72271990094037003-dummy.host.com:8984_solr-n_0000000008,
 state=RUNNABLE, group=Overseer autoscaling triggers]         at 
java.security.AccessController.doPrivileged(Native Method)         at 
com.carrotsearch.ant.tasks.junit4.events.Serializer.flushQueue(Serializer.java:114)
         at 
com.carrotsearch.ant.tasks.junit4.events.Serializer.serialize(Serializer.java:99)
         at 
com.carrotsearch.ant.tasks.junit4.slave.SlaveMain$3$2.write(SlaveMain.java:472) 
        at 
java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)         
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)         at 
java.io.PrintStream.flush(PrintStream.java:338)         at 
java.io.FilterOutputStream.flush(FilterOutputStream.java:140)         at 
java.io.PrintStream.write(PrintStream.java:482)         at 
sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)         at 
sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:291)         at 
sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:295)         at 
sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141)         at 
java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229)         at 
org.apache.log4j.helpers.QuietWriter.flush(QuietWriter.java:59)         at 
org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:324)         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: There are still zombie 
threads that couldn't be terminated:
   1) Thread[id=12149, 
name=OverseerAutoScalingTriggerThread-72271990094037003-dummy.host.com:8984_solr-n_0000000008,
 state=RUNNABLE, group=Overseer autoscaling triggers]
        at java.security.AccessController.doPrivileged(Native Method)
        at 
com.carrotsearch.ant.tasks.junit4.events.Serializer.flushQueue(Serializer.java:114)
        at 
com.carrotsearch.ant.tasks.junit4.events.Serializer.serialize(Serializer.java:99)
        at 
com.carrotsearch.ant.tasks.junit4.slave.SlaveMain$3$2.write(SlaveMain.java:472)
        at 
java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
        at java.io.PrintStream.flush(PrintStream.java:338)
        at java.io.FilterOutputStream.flush(FilterOutputStream.java:140)
        at java.io.PrintStream.write(PrintStream.java:482)
        at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
        at sun.nio.cs.StreamEncoder.implFlushBuffer(StreamEncoder.java:291)
        at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:295)
        at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141)
        at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229)
        at org.apache.log4j.helpers.QuietWriter.flush(QuietWriter.java:59)
        at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:324)
        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([2CFA622B8CAD3BD1]:0)


FAILED:  org.apache.solr.logging.TestLogWatcher.testLog4jWatcher

Error Message:
expected:<21> but was:<1>

Stack Trace:
java.lang.AssertionError: expected:<21> but was:<1>
        at org.junit.Assert.fail(Assert.java:93)
        at org.junit.Assert.failNotEquals(Assert.java:647)
        at org.junit.Assert.assertEquals(Assert.java:128)
        at org.junit.Assert.assertEquals(Assert.java:472)
        at org.junit.Assert.assertEquals(Assert.java:456)
        at 
org.apache.solr.logging.TestLogWatcher.testLog4jWatcher(TestLogWatcher.java:52)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
        at 
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
        at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
        at 
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
        at 
com.carrotsearch.ant.tasks.junit4.slave.SlaveMain.execute(SlaveMain.java:251)
        at 
com.carrotsearch.ant.tasks.junit4.slave.SlaveMain.main(SlaveMain.java:368)
        at 
com.carrotsearch.ant.tasks.junit4.slave.SlaveMainSafe.main(SlaveMainSafe.java:13)




Build Log:
[...truncated 13257 lines...]
   [junit4] Suite: org.apache.solr.cloud.TestLeaderElectionZkExpiry
   [junit4]   2> Creating dataDir: 
/home/jenkins/jenkins-slave/workspace/Lucene-Solr-Tests-7.x/solr/build/solr-core/test/J2/temp/solr.cloud.TestLeaderElectionZkExpiry_2CFA622B8CAD3BD1-001/init-core-data-001
   [junit4]   2> 2310912 WARN  
(SUITE-TestLeaderElectionZkExpiry-seed#[2CFA622B8CAD3BD1]-worker) [    ] 
o.a.s.SolrTestCaseJ4 startTrackingSearchers: numOpens=26 numCloses=26
   [junit4]   2> 2310912 INFO  
(SUITE-TestLeaderElectionZkExpiry-seed#[2CFA622B8CAD3BD1]-worker) [    ] 
o.a.s.SolrTestCaseJ4 Using PointFields (NUMERIC_POINTS_SYSPROP=true) 
w/NUMERIC_DOCVALUES_SYSPROP=false
   [junit4]   2> 2310914 INFO  
(SUITE-TestLeaderElectionZkExpiry-seed#[2CFA622B8CAD3BD1]-worker) [    ] 
o.a.s.SolrTestCaseJ4 Randomized ssl (true) and clientAuth (true) via: 
@org.apache.solr.util.RandomizeSSL(reason=, ssl=NaN, value=NaN, clientAuth=NaN)
   [junit4]   2> 2310915 INFO  
(SUITE-TestLeaderElectionZkExpiry-seed#[2CFA622B8CAD3BD1]-worker) [    ] 
o.a.s.SolrTestCaseJ4 SecureRandom sanity checks: 
test.solr.allowed.securerandom=null & java.security.egd=file:/dev/./urandom
   [junit4]   2> 2310917 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [    ] o.a.s.SolrTestCaseJ4 ###Starting testLeaderElectionWithZkExpiry
   [junit4]   2> 2310927 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [    ] o.a.s.c.SolrXmlConfig MBean server found: 
com.sun.jmx.mbeanserver.JmxMBeanServer@5f453d04, but no JMX reporters were 
configured - adding default JMX reporter.
   [junit4]   2> 2310974 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [    ] o.a.s.m.r.SolrJmxReporter JMX monitoring for 'solr.node' (registry 
'solr.node') enabled at server: com.sun.jmx.mbeanserver.JmxMBeanServer@5f453d04
   [junit4]   2> 2310982 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [    ] o.a.s.m.r.SolrJmxReporter JMX monitoring for 'solr.jvm' (registry 
'solr.jvm') enabled at server: com.sun.jmx.mbeanserver.JmxMBeanServer@5f453d04
   [junit4]   2> 2310983 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [    ] o.a.s.m.r.SolrJmxReporter JMX monitoring for 'solr.jetty' (registry 
'solr.jetty') enabled at server: com.sun.jmx.mbeanserver.JmxMBeanServer@5f453d04
   [junit4]   2> 2310984 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [    ] o.a.s.c.CorePropertiesLocator Found 0 core definitions underneath 
/home/jenkins/jenkins-slave/workspace/Lucene-Solr-Tests-7.x/solr/build/solr-core/test/J2/temp/solr.cloud.TestLeaderElectionZkExpiry_2CFA622B8CAD3BD1-001/testLeaderElectionWithZkExpiry-solr-001
   [junit4]   2> 2310985 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [    ] o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 2310985 INFO  (Thread-3721) [    ] o.a.s.c.ZkTestServer client 
port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 2310985 INFO  (Thread-3721) [    ] o.a.s.c.ZkTestServer 
Starting server
   [junit4]   2> 2310986 ERROR (Thread-3721) [    ] 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> 2311085 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [    ] o.a.s.c.ZkTestServer start zk server on port:42067
   [junit4]   2> 2311088 INFO  (zkConnectionManagerCallback-2581-thread-1) [    
] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2311089 INFO  (zkConnectionManagerCallback-2583-thread-1) [    
] o.a.s.c.c.ConnectionManager zkClient has connected
   [junit4]   2> 2311092 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
connected
   [junit4]   2> 2311190 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer (id=null) closing
   [junit4]   2> 2311191 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [n:dummy.host.com:8984_solr    ] o.a.s.c.OverseerElectionContext I am going to 
be the leader dummy.host.com:8984_solr
   [junit4]   2> 2311192 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094036994-dummy.host.com:8984_solr-n_0000000000) starting
   [junit4]   2> 2311199 INFO  
(zkConnectionManagerCallback-2590-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
connected
   [junit4]   2> 2311200 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [n:dummy.host.com:8984_solr    ] o.a.s.c.s.i.ZkClientClusterStateProvider 
Cluster at 127.0.0.1:42067/solr ready
   [junit4]   2> 2311202 INFO  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1])
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController Register node as live in 
ZooKeeper:/live_nodes/dummy.host.com:8984_solr
   [junit4]   2> 2311213 INFO  
(zkCallback-2589-thread-1-processing-n:dummy.host.com:8984_solr) 
[n:dummy.host.com:8984_solr    ] o.a.s.c.c.ZkStateReader Updated live nodes 
from ZooKeeper... (0) -> (1)
   [junit4]   2> 2311214 INFO  
(zkCallback-2584-thread-1-processing-n:dummy.host.com:8984_solr) 
[n:dummy.host.com:8984_solr    ] o.a.s.c.c.ZkStateReader Updated live nodes 
from ZooKeeper... (0) -> (1)
   [junit4]   2> 2311218 INFO  
(zkCallback-2589-thread-1-processing-n:dummy.host.com:8984_solr) 
[n:dummy.host.com:8984_solr    ] o.a.s.c.c.ZkStateReader Updated live nodes 
from ZooKeeper... (1) -> (0)
   [junit4]   2> 2311316 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Disconnected type:None path:null path: null type: None
   [junit4]   2> 2311316 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
disconnected
   [junit4]   2> 2312517 WARN  
(TEST-TestLeaderElectionZkExpiry.testLeaderElectionWithZkExpiry-seed#[2CFA622B8CAD3BD1]-SendThread(127.0.0.1:42067))
 [n:dummy.host.com:8984_solr    ] o.a.z.ClientCnxn Unable to reconnect to 
ZooKeeper service, session 0x100c2fdf8c40002 has expired
   [junit4]   2> 2312518 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Expired type:None path:null path: null type: None
   [junit4]   2> 2312518 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Our previous 
ZooKeeper session was expired. Attempting to reconnect to recover relationship 
with ZooKeeper...
   [junit4]   2> 2312518 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094036994-dummy.host.com:8984_solr-n_0000000000) closing
   [junit4]   2> 2312518 INFO  
(OverseerStateUpdate-72271990094036994-dummy.host.com:8984_solr-n_0000000000) 
[n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer Loop exiting : 
dummy.host.com:8984_solr
   [junit4]   2> 2312530 ERROR (OverseerExitThread) [n:dummy.host.com:8984_solr 
   ] o.a.s.c.Overseer could not read the data
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer_elect/leader
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1215)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:306)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 2312816 WARN  
(zkCallback-2584-thread-1-processing-n:dummy.host.com:8984_solr) 
[n:dummy.host.com:8984_solr    ] o.a.s.c.c.ZkStateReader ZooKeeper watch 
triggered, but Solr cannot talk to ZK: [KeeperErrorCode = Session expired for 
/live_nodes]
   [junit4]   2> 2312816 ERROR 
(OverseerAutoScalingTriggerThread-72271990094036994-dummy.host.com:8984_solr-n_0000000000)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.ScheduledTriggers Failed to add 
trigger .auto_add_replicas
   [junit4]   2> org.apache.solr.common.SolrException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /autoscaling/events/.auto_add_replicas
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueue.<init>(ZkDistributedQueue.java:124)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueue.<init>(ZkDistributedQueue.java:114)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueue.<init>(ZkDistributedQueue.java:110)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueueFactory.makeQueue(ZkDistributedQueueFactory.java:36)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerEventQueue.<init>(TriggerEventQueue.java:49)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$TriggerWrapper.<init>(ScheduledTriggers.java:511)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers.add(ScheduledTriggers.java:204)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:227)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /autoscaling/events/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1105)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:316)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:316)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.ensureExists(ZkCmdExecutor.java:93)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.ensureExists(ZkCmdExecutor.java:78)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueue.<init>(ZkDistributedQueue.java:122)
   [junit4]   2>        ... 8 more
   [junit4]   2> 2312817 WARN  
(OverseerAutoScalingTriggerThread-72271990094036994-dummy.host.com:8984_solr-n_0000000000)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.OverseerTriggerThread Error 
removing old nodeAdded markers
   [junit4]   2> java.lang.InterruptedException
   [junit4]   2>        at java.lang.Object.wait(Native Method)
   [junit4]   2>        at java.lang.Object.wait(Object.java:502)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1409)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1533)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getChildren$4(SolrZkClient.java:328)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getChildren(SolrZkClient.java:328)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.listData(ZkDistribStateManager.java:67)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.listData(ZkDistribStateManager.java:77)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:254)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 2312817 WARN  
(OverseerAutoScalingTriggerThread-72271990094036994-dummy.host.com:8984_solr-n_0000000000)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.OverseerTriggerThread 
OverseerTriggerThread has been closed, exiting.
   [junit4]   2> 2312817 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy 
Connection expired - starting a new one...
   [junit4]   2> 2312842 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
connected
   [junit4]   2> 2312842 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Connection with 
ZooKeeper reestablished.
   [junit4]   2> 2312842 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController ZooKeeper session 
re-connected ... refreshing core states after session expiration.
   [junit4]   2> 2312843 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ZkStateReader Updated live nodes 
from ZooKeeper... (1) -> (0)
   [junit4]   2> 2312848 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.OverseerElectionContext I am going to 
be the leader dummy.host.com:8984_solr
   [junit4]   2> 2312849 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094036996-dummy.host.com:8984_solr-n_0000000001) starting
   [junit4]   2> 2312950 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Disconnected type:None path:null path: null type: None
   [junit4]   2> 2312950 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
disconnected
   [junit4]   2> 2314035 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-SendThread(127.0.0.1:42067))
 [n:dummy.host.com:8984_solr    ] o.a.z.ClientCnxn Unable to reconnect to 
ZooKeeper service, session 0x100c2fdf8c40004 has expired
   [junit4]   2> 2314035 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Expired type:None path:null path: null type: None
   [junit4]   2> 2314036 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Our previous 
ZooKeeper session was expired. Attempting to reconnect to recover relationship 
with ZooKeeper...
   [junit4]   2> 2314450 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Could not create Overseer 
node
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer
   [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.create(ZooKeeper.java:786)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:796)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.start(Overseer.java:524)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:216)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:355)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient$1.lambda$process$0(SolrZkClient.java:267)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.run(FutureTask.java:266)
   [junit4]   2>        at 
org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:188)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 2314450 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094036996-dummy.host.com:8984_solr-n_0000000001) closing
   [junit4]   2> 2314450 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy 
Connection expired - starting a new one...
   [junit4]   2> 2314450 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController 
:java.lang.RuntimeException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:805)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.start(Overseer.java:524)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:216)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:355)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient$1.lambda$process$0(SolrZkClient.java:267)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.run(FutureTask.java:266)
   [junit4]   2>        at 
org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:188)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:786)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:796)
   [junit4]   2>        ... 17 more
   [junit4]   2> 
   [junit4]   2> 2314451 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy Reconnect 
to ZooKeeper failed:org.apache.solr.common.cloud.ZooKeeperException: 
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:415)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient$1.lambda$process$0(SolrZkClient.java:267)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.run(FutureTask.java:266)
   [junit4]   2>        at 
org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:188)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: java.lang.RuntimeException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:805)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.start(Overseer.java:524)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:216)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:355)
   [junit4]   2>        ... 10 more
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [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.create(ZooKeeper.java:786)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:796)
   [junit4]   2>        ... 17 more
   [junit4]   2> 
   [junit4]   2> 2314451 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy Reconnect 
to ZooKeeper failed
   [junit4]   2> 2314451 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient 
Connected:false
   [junit4]   2> 2314451 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
connected
   [junit4]   2> 2314452 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Connection with 
ZooKeeper reestablished.
   [junit4]   2> 2314452 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController ZooKeeper session 
re-connected ... refreshing core states after session expiration.
   [junit4]   2> 2314455 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.OverseerElectionContext I am going to 
be the leader dummy.host.com:8984_solr
   [junit4]   2> 2314456 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094036997-dummy.host.com:8984_solr-n_0000000002) starting
   [junit4]   2> 2314561 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Disconnected type:None path:null path: null type: None
   [junit4]   2> 2314562 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
disconnected
   [junit4]   2> 2315683 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-SendThread(127.0.0.1:42067))
 [n:dummy.host.com:8984_solr    ] o.a.z.ClientCnxn Unable to reconnect to 
ZooKeeper service, session 0x100c2fdf8c40005 has expired
   [junit4]   2> 2315683 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Expired type:None path:null path: null type: None
   [junit4]   2> 2315683 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Our previous 
ZooKeeper session was expired. Attempting to reconnect to recover relationship 
with ZooKeeper...
   [junit4]   2> 2315683 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094036997-dummy.host.com:8984_solr-n_0000000002) closing
   [junit4]   2> 2315683 WARN  (NIOServerCxn.Factory:0.0.0.0/0.0.0.0:0) [    ] 
o.a.z.s.NIOServerCnxn CancelledKeyException causing close of session 
0x100c2fdf8c40005
   [junit4] HEARTBEAT J0 PID(5...@lucene2-us-west.apache.org): 
2018-03-13T09:42:21, stalled for  131s at: BasicDistributedZkTest.test
   [junit4]   2> 2315684 INFO  
(OverseerCollectionConfigSetProcessor-72271990094036997-dummy.host.com:8984_solr-n_0000000002)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.OverseerTaskProcessor According to ZK 
I (id=72271990094036997-dummy.host.com:8984_solr-n_0000000002) am no longer a 
leader.
   [junit4]   2> 2315684 INFO  
(OverseerStateUpdate-72271990094036997-dummy.host.com:8984_solr-n_0000000002) 
[n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer According to ZK I 
(id=72271990094036997-dummy.host.com:8984_solr-n_0000000002) am no longer a 
leader.
   [junit4]   2> 2315684 INFO  
(OverseerStateUpdate-72271990094036997-dummy.host.com:8984_solr-n_0000000002) 
[n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer Loop exiting : 
dummy.host.com:8984_solr
   [junit4]   2> 2315684 ERROR 
(OverseerCollectionConfigSetProcessor-72271990094036997-dummy.host.com:8984_solr-n_0000000002)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.OverseerTaskProcessor 
:org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode 
= Session expired for /overseer/collection-queue-work
   [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.getChildren(ZooKeeper.java:1535)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getChildren$4(SolrZkClient.java:328)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getChildren(SolrZkClient.java:328)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueue.fetchZkChildren(ZkDistributedQueue.java:410)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerTaskQueue.getTailId(OverseerTaskQueue.java:272)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerTaskProcessor.run(OverseerTaskProcessor.java:163)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 
   [junit4]   2> 2315684 ERROR 
(OverseerCollectionConfigSetProcessor-72271990094036997-dummy.host.com:8984_solr-n_0000000002)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.OverseerTaskProcessor Unable to 
prioritize overseer 
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /roles.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.exists(ZooKeeper.java:1105)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:316)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:316)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerNodePrioritizer.prioritizeOverseerNodes(OverseerNodePrioritizer.java:60)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerTaskProcessor.run(OverseerTaskProcessor.java:178)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 2315684 ERROR (OverseerExitThread) [n:dummy.host.com:8984_solr 
   ] o.a.s.c.Overseer could not read the data
   [junit4]   2> org.apache.zookeeper.KeeperException$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.getData(ZooKeeper.java:1215)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:306)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 2316061 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Could not create Overseer 
node
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:130)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:786)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:796)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.getStateUpdateQueue(Overseer.java:662)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.getStateUpdateQueue(Overseer.java:649)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController.publishNodeAsDown(ZkController.java:2732)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController.registerAllCoresAsDown(ZkController.java:467)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController.access$400(ZkController.java:138)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:360)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> 2316062 ERROR 
(OverseerAutoScalingTriggerThread-72271990094036997-dummy.host.com:8984_solr-n_0000000002)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.ScheduledTriggers Failed to add 
trigger .auto_add_replicas
   [junit4]   2> org.apache.solr.common.SolrException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /autoscaling/events/.auto_add_replicas
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueue.<init>(ZkDistributedQueue.java:124)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueue.<init>(ZkDistributedQueue.java:114)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueue.<init>(ZkDistributedQueue.java:110)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueueFactory.makeQueue(ZkDistributedQueueFactory.java:36)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerEventQueue.<init>(TriggerEventQueue.java:49)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$TriggerWrapper.<init>(ScheduledTriggers.java:511)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers.add(ScheduledTriggers.java:204)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:227)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /autoscaling/events/.auto_add_replicas
   [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$3(SolrZkClient.java:316)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:316)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.ensureExists(ZkCmdExecutor.java:93)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.ensureExists(ZkCmdExecutor.java:78)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkDistributedQueue.<init>(ZkDistributedQueue.java:122)
   [junit4]   2>        ... 8 more
   [junit4]   2> 2316062 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController Could not publish node 
as down: org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer
   [junit4]   2> 2316063 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController Register node as live in 
ZooKeeper:/live_nodes/dummy.host.com:8984_solr
   [junit4]   2> 2316063 WARN  
(OverseerAutoScalingTriggerThread-72271990094036997-dummy.host.com:8984_solr-n_0000000002)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.OverseerTriggerThread Error 
removing old nodeAdded markers
   [junit4]   2> java.lang.InterruptedException
   [junit4]   2>        at java.lang.Object.wait(Native Method)
   [junit4]   2>        at java.lang.Object.wait(Object.java:502)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn.submitRequest(ClientCnxn.java:1409)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1533)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getChildren$4(SolrZkClient.java:328)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getChildren(SolrZkClient.java:328)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.listData(ZkDistribStateManager.java:67)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.listData(ZkDistribStateManager.java:77)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:254)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 2316063 WARN  
(OverseerAutoScalingTriggerThread-72271990094036997-dummy.host.com:8984_solr-n_0000000002)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.OverseerTriggerThread 
OverseerTriggerThread has been closed, exiting.
   [junit4]   2> 2316063 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController 
:org.apache.zookeeper.KeeperException$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.common.cloud.ZkStateReader.getAutoScalingConfig(ZkStateReader.java:195)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkStateReader.getAutoScalingConfig(ZkStateReader.java:181)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController.createEphemeralLiveNode(ZkController.java:974)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController.access$500(ZkController.java:138)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:363)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> 
   [junit4]   2> 2316064 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy 
Connection expired - starting a new one...
   [junit4]   2> 2316064 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy Reconnect 
to ZooKeeper failed:org.apache.solr.common.cloud.ZooKeeperException: 
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:415)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$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.common.cloud.ZkStateReader.getAutoScalingConfig(ZkStateReader.java:195)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkStateReader.getAutoScalingConfig(ZkStateReader.java:181)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController.createEphemeralLiveNode(ZkController.java:974)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController.access$500(ZkController.java:138)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:363)
   [junit4]   2>        ... 5 more
   [junit4]   2> 
   [junit4]   2> 2316064 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy Reconnect 
to ZooKeeper failed
   [junit4]   2> 2316064 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient 
Connected:false
   [junit4]   2> 2316065 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
connected
   [junit4]   2> 2316065 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Connection with 
ZooKeeper reestablished.
   [junit4]   2> 2316065 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController ZooKeeper session 
re-connected ... refreshing core states after session expiration.
   [junit4]   2> 2316068 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.OverseerElectionContext I am going to 
be the leader dummy.host.com:8984_solr
   [junit4]   2> 2316069 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094036998-dummy.host.com:8984_solr-n_0000000003) starting
   [junit4]   2> 2316170 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Disconnected type:None path:null path: null type: None
   [junit4]   2> 2316170 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
disconnected
   [junit4]   2> 2317464 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-SendThread(127.0.0.1:42067))
 [n:dummy.host.com:8984_solr    ] o.a.z.ClientCnxn Unable to reconnect to 
ZooKeeper service, session 0x100c2fdf8c40006 has expired
   [junit4]   2> 2317464 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Expired type:None path:null path: null type: None
   [junit4]   2> 2317464 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Our previous 
ZooKeeper session was expired. Attempting to reconnect to recover relationship 
with ZooKeeper...
   [junit4]   2> 2317670 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Could not create Overseer 
node
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer
   [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.create(ZooKeeper.java:786)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:796)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.getStateUpdateQueue(Overseer.java:662)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.<init>(Overseer.java:109)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.start(Overseer.java:527)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:216)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:355)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> 2317670 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094036998-dummy.host.com:8984_solr-n_0000000003) closing
   [junit4]   2> 2317670 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController 
:java.lang.RuntimeException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:805)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.getStateUpdateQueue(Overseer.java:662)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.<init>(Overseer.java:109)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.start(Overseer.java:527)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:216)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:355)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [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.create(ZooKeeper.java:786)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:796)
   [junit4]   2>        ... 14 more
   [junit4]   2> 
   [junit4]   2> 2317670 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy 
Connection expired - starting a new one...
   [junit4]   2> 2317670 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy Reconnect 
to ZooKeeper failed:org.apache.solr.common.cloud.ZooKeeperException: 
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:415)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> Caused by: java.lang.RuntimeException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:805)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.getStateUpdateQueue(Overseer.java:662)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.<init>(Overseer.java:109)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.start(Overseer.java:527)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:216)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:355)
   [junit4]   2>        ... 5 more
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [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.create(ZooKeeper.java:786)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:796)
   [junit4]   2>        ... 14 more
   [junit4]   2> 
   [junit4]   2> 2317671 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy Reconnect 
to ZooKeeper failed
   [junit4]   2> 2317671 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient 
Connected:false
   [junit4]   2> 2317671 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
connected
   [junit4]   2> 2317671 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Connection with 
ZooKeeper reestablished.
   [junit4]   2> 2317672 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController ZooKeeper session 
re-connected ... refreshing core states after session expiration.
   [junit4]   2> 2317675 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.OverseerElectionContext I am going to 
be the leader dummy.host.com:8984_solr
   [junit4]   2> 2317675 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094036999-dummy.host.com:8984_solr-n_0000000004) starting
   [junit4]   2> 2317677 WARN  (NIOServerCxn.Factory:0.0.0.0/0.0.0.0:0) [    ] 
o.a.z.s.NIOServerCnxn CancelledKeyException causing close of session 
0x100c2fdf8c40007
   [junit4]   2> 2317777 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Disconnected type:None path:null path: null type: None
   [junit4]   2> 2317777 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
disconnected
   [junit4]   2> 2319268 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-SendThread(127.0.0.1:42067))
 [n:dummy.host.com:8984_solr    ] o.a.z.ClientCnxn Unable to reconnect to 
ZooKeeper service, session 0x100c2fdf8c40007 has expired
   [junit4]   2> 2319268 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Expired type:None path:null path: null type: None
   [junit4]   2> 2319268 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Our previous 
ZooKeeper session was expired. Attempting to reconnect to recover relationship 
with ZooKeeper...
   [junit4]   2> 2319277 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Could not create Overseer 
node
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer
   [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.create(ZooKeeper.java:786)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:796)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.getFailureMap(Overseer.java:700)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.<init>(Overseer.java:111)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.start(Overseer.java:527)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:216)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:355)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> 2319278 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094036999-dummy.host.com:8984_solr-n_0000000004) closing
   [junit4]   2> 2319278 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy 
Connection expired - starting a new one...
   [junit4]   2> 2319278 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController 
:java.lang.RuntimeException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:805)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.getFailureMap(Overseer.java:700)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.<init>(Overseer.java:111)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.start(Overseer.java:527)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:216)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:355)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [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.create(ZooKeeper.java:786)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:796)
   [junit4]   2>        ... 14 more
   [junit4]   2> 
   [junit4]   2> 2319278 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy Reconnect 
to ZooKeeper failed:org.apache.solr.common.cloud.ZooKeeperException: 
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:415)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> Caused by: java.lang.RuntimeException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:805)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.getFailureMap(Overseer.java:700)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.<init>(Overseer.java:111)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.start(Overseer.java:527)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:216)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:355)
   [junit4]   2>        ... 5 more
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer
   [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.create(ZooKeeper.java:786)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:365)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.createOverseerNode(Overseer.java:796)
   [junit4]   2>        ... 14 more
   [junit4]   2> 
   [junit4]   2> 2319278 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy Reconnect 
to ZooKeeper failed
   [junit4]   2> 2319278 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient 
Connected:false
   [junit4]   2> 2319279 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
connected
   [junit4]   2> 2319279 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Connection with 
ZooKeeper reestablished.
   [junit4]   2> 2319279 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController ZooKeeper session 
re-connected ... refreshing core states after session expiration.
   [junit4]   2> 2319282 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.OverseerElectionContext I am going to 
be the leader dummy.host.com:8984_solr
   [junit4]   2> 2319283 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094037000-dummy.host.com:8984_solr-n_0000000005) starting
   [junit4]   2> 2319387 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Disconnected type:None path:null path: null type: None
   [junit4]   2> 2319387 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager zkClient has 
disconnected
   [junit4]   2> 2320675 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-SendThread(127.0.0.1:42067))
 [n:dummy.host.com:8984_solr    ] o.a.z.ClientCnxn Unable to reconnect to 
ZooKeeper service, session 0x100c2fdf8c40008 has expired
   [junit4]   2> 2320675 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Watcher 
org.apache.solr.common.cloud.ConnectionManager@724849c2 name: 
ZooKeeperConnection Watcher:127.0.0.1:42067/solr got event WatchedEvent 
state:Expired type:None path:null path: null type: None
   [junit4]   2> 2320675 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.ConnectionManager Our previous 
ZooKeeper session was expired. Attempting to reconnect to recover relationship 
with ZooKeeper...
   [junit4]   2> 2320887 INFO  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.Overseer Overseer 
(id=72271990094037000-dummy.host.com:8984_solr-n_0000000005) closing
   [junit4]   2> 2320887 WARN  
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy 
Connection expired - starting a new one...
   [junit4]   2> 2320887 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.ZkController 
:org.apache.solr.common.SolrException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer/collection-map-running
   [junit4]   2>        at 
org.apache.solr.cloud.DistributedMap.<init>(DistributedMap.java:50)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.getRunningMap(Overseer.java:689)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerCollectionConfigSetProcessor.<init>(OverseerCollectionConfigSetProcessor.java:50)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.start(Overseer.java:533)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerElectionContext.runLeaderProcess(ElectionContext.java:850)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:170)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:135)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:307)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:216)
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:355)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer/collection-map-running
   [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.DistributedMap.<init>(DistributedMap.java:48)
   [junit4]   2>        ... 14 more
   [junit4]   2> 
   [junit4]   2> 2320887 ERROR 
(zkConnectionManagerCallback-2585-thread-1-processing-n:dummy.host.com:8984_solr-EventThread)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.c.DefaultConnectionStrategy Reconnect 
to ZooKeeper failed:org.apache.solr.common.cloud.ZooKeeperException: 
   [junit4]   2>        at 
org.apache.solr.cloud.ZkController$1.command(ZkController.java:415)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager$1.update(ConnectionManager.java:167)
   [junit4]   2>        at 
org.apache.solr.common.cloud.DefaultConnectionStrategy.reconnect(DefaultConnectionStrategy.java:57)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ConnectionManager.process(ConnectionManager.java:141)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:531)
   [junit4]   2>        at 
org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:506)
   [junit4]   2> Caused by: org.apache.solr.common.SolrException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /overseer/collection-map-running
   [junit4]   2>        at 
org.apache.solr.cloud.DistributedMap.<init>(DistributedMap.java:50)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer.getRunningMap(Overseer.java:689)
   [junit4]   2>        at 
org.apache.solr.cloud.OverseerCollectionConfigSetProcessor.<init>(OverseerCollectionConfigSetProcessor.java:50)
   [junit4]   2>        at org.apache.solr.cloud.Overseer.start(Overseer.java:53

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

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$5(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2>        ... 3 more
   [junit4]   2> 2692498 ERROR 
(OverseerAutoScalingTriggerThread-72271990094037003-dummy.host.com:8984_solr-n_0000000008)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error 
has occurred
   [junit4]   2> java.io.IOException: 
org.apache.zookeeper.KeeperException$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$5(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2>        ... 3 more
   [junit4]   2> 2692498 ERROR 
(OverseerAutoScalingTriggerThread-72271990094037003-dummy.host.com:8984_solr-n_0000000008)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error 
has occurred
   [junit4]   2> java.io.IOException: 
org.apache.zookeeper.KeeperException$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$5(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2>        ... 3 more
   [junit4]   2> 2692498 ERROR 
(OverseerAutoScalingTriggerThread-72271990094037003-dummy.host.com:8984_solr-n_0000000008)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error 
has occurred
   [junit4]   2> java.io.IOException: 
org.apache.zookeeper.KeeperException$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$5(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2>        ... 3 more
   [junit4]   2> 2692499 ERROR 
(OverseerAutoScalingTriggerThread-72271990094037003-dummy.host.com:8984_solr-n_0000000008)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error 
has occurred
   [junit4]   2> java.io.IOException: 
org.apache.zookeeper.KeeperException$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$5(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:340)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:176)
   [junit4]   2>        ... 3 more
   [junit4]   2> 2692499 ERROR 
(OverseerAutoScalingTriggerThread-72271990094037003-dummy.host.com:8984_solr-n_0000000008)
 [n:dummy.host.com:8984_solr    ] o.a.s.c.a.OverseerTriggerThread A ZK error 
has occurred
   [junit4]   2> java.io.IOException: 
org.apache.zookeeper.KeeperException$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] FAILURE 0.11s J2 | TestLogWatcher.testLog4jWatcher <<<
   [junit4]    > Throwable #1: java.lang.AssertionError: expected:<21> but 
was:<1>
   [junit4]    >        at 
org.apache.solr.logging.TestLogWatcher.testLog4jWatcher(TestLogWatcher.java:52)
   [junit4] Completed [652/783 (2!)] on J2 in 0.11s, 1 test, 1 failure <<< 
FAILURES!

[...truncated 49966 lines...]
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