Build: https://jenkins.thetaphi.de/job/Lucene-Solr-master-Linux/20864/
Java: 32bit/jdk1.8.0_144 -server -XX:+UseSerialGC

1 tests failed.
FAILED:  org.apache.solr.cloud.OverseerTest.testShardLeaderChange

Error Message:
Unexpected shard leader coll:collection1 shard:shard1 expected:<core[4]> but 
was:<core[1]>

Stack Trace:
org.junit.ComparisonFailure: Unexpected shard leader coll:collection1 
shard:shard1 expected:<core[4]> but was:<core[1]>
        at 
__randomizedtesting.SeedInfo.seed([6551E3633E376E07:BB02649424AF9BF6]:0)
        at org.junit.Assert.assertEquals(Assert.java:125)
        at 
org.apache.solr.cloud.OverseerTest.verifyShardLeader(OverseerTest.java:565)
        at 
org.apache.solr.cloud.OverseerTest.testShardLeaderChange(OverseerTest.java:862)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1737)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:934)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:970)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:984)
        at 
com.carrotsearch.randomizedtesting.rules.SystemPropertiesRestoreRule$1.evaluate(SystemPropertiesRestoreRule.java:57)
        at 
org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:49)
        at 
org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:45)
        at 
org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:48)
        at 
org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:64)
        at 
org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:47)
        at 
com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:368)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:817)
        at 
com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:468)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:943)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:829)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:879)
        at 
com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:890)
        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)




Build Log:
[...truncated 12807 lines...]
   [junit4] Suite: org.apache.solr.cloud.OverseerTest
   [junit4]   2> Creating dataDir: 
/home/jenkins/workspace/Lucene-Solr-master-Linux/solr/build/solr-core/test/J1/temp/solr.cloud.OverseerTest_6551E3633E376E07-001/init-core-data-001
   [junit4]   2> 1322225 WARN  
(SUITE-OverseerTest-seed#[6551E3633E376E07]-worker) [    ] o.a.s.SolrTestCaseJ4 
startTrackingSearchers: numOpens=4 numCloses=4
   [junit4]   2> 1322225 INFO  
(SUITE-OverseerTest-seed#[6551E3633E376E07]-worker) [    ] o.a.s.SolrTestCaseJ4 
Using PointFields (NUMERIC_POINTS_SYSPROP=true) 
w/NUMERIC_DOCVALUES_SYSPROP=false
   [junit4]   2> 1322226 INFO  
(SUITE-OverseerTest-seed#[6551E3633E376E07]-worker) [    ] o.a.s.SolrTestCaseJ4 
Randomized ssl (true) and clientAuth (false) via: 
@org.apache.solr.util.RandomizeSSL(reason=, ssl=NaN, value=NaN, clientAuth=NaN)
   [junit4]   2> 1322226 INFO  
(SUITE-OverseerTest-seed#[6551E3633E376E07]-worker) [    ] o.a.s.SolrTestCaseJ4 
SecureRandom sanity checks: test.solr.allowed.securerandom=null & 
java.security.egd=file:/dev/./urandom
   [junit4]   2> 1322226 INFO  
(SUITE-OverseerTest-seed#[6551E3633E376E07]-worker) [    ] o.a.s.SolrTestCaseJ4 
####initCore
   [junit4]   2> 1322227 INFO  
(SUITE-OverseerTest-seed#[6551E3633E376E07]-worker) [    ] o.a.s.SolrTestCaseJ4 
####initCore end
   [junit4]   2> 1322229 INFO  
(TEST-OverseerTest.testBadQueueItem-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Starting testBadQueueItem
   [junit4]   2> 1322229 INFO  
(TEST-OverseerTest.testBadQueueItem-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 1322230 INFO  (Thread-2441) [    ] o.a.s.c.ZkTestServer client 
port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 1322230 INFO  (Thread-2441) [    ] o.a.s.c.ZkTestServer 
Starting server
   [junit4]   2> 1322242 ERROR (Thread-2441) [    ] 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> 1322330 INFO  
(TEST-OverseerTest.testBadQueueItem-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer start zk server on port:35637
   [junit4]   2> 1322361 INFO  
(TEST-OverseerTest.testBadQueueItem-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer (id=null) closing
   [junit4]   2> 1322361 INFO  
(TEST-OverseerTest.testBadQueueItem-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:35637_solr
   [junit4]   2> 1322362 INFO  
(TEST-OverseerTest.testBadQueueItem-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968759840866307-127.0.0.1:35637_solr-n_0000000000) starting
   [junit4]   2> 1322374 INFO  (zkCallback-1549-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1322374 INFO  (zkCallback-1555-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1322375 INFO  (zkCallback-1548-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1324045 ERROR 
(OverseerStateUpdate-98968759840866307-127.0.0.1:35637_solr-n_0000000000) [    
] o.a.s.c.o.CollectionMutator Skipping invalid Overseer message because it has 
no collection specified: {
   [junit4]   2>   "operation":"state",
   [junit4]   2>   "state":"active",
   [junit4]   2>   "node_name":"127.0.0.1",
   [junit4]   2>   "core":"core0",
   [junit4]   2>   "core_node_name":"node0",
   [junit4]   2>   "collection":"",
   [junit4]   2>   "shard":"shard1",
   [junit4]   2>   "numShards":"1",
   [junit4]   2>   "base_url":"http://127.0.0.1/solr/"}
   [junit4]   2> 1324046 ERROR 
(OverseerStateUpdate-98968759840866307-127.0.0.1:35637_solr-n_0000000000) [    
] o.a.s.c.o.CollectionMutator Skipping invalid Overseer message because it has 
no collection specified: {
   [junit4]   2>   "operation":"deletecore",
   [junit4]   2>   "node_name":"127.0.0.1",
   [junit4]   2>   "core":"core0",
   [junit4]   2>   "core_node_name":"node0",
   [junit4]   2>   "collection":""}
   [junit4]   2> 1325716 INFO  (zkCallback-1555-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1325716 INFO  (zkCallback-1549-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1325717 ERROR 
(TEST-OverseerTest.testBadQueueItem-seed#[6551E3633E376E07]) [    ] 
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> 1325718 INFO  
(TEST-OverseerTest.testBadQueueItem-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer connecting to 127.0.0.1:35637 35637
   [junit4]   2> 1326367 INFO  
(OverseerCollectionConfigSetProcessor-98968759840866307-127.0.0.1:35637_solr-n_0000000000)
 [    ] o.a.s.c.OverseerTaskProcessor According to ZK I 
(id=98968759840866307-127.0.0.1:35637_solr-n_0000000000) am no longer a leader.
   [junit4]   2> 1326369 WARN  (ScheduledTrigger-4050-thread-1) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1327370 WARN  (ScheduledTrigger-4050-thread-1) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1328370 WARN  (ScheduledTrigger-4050-thread-1) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1329371 WARN  (ScheduledTrigger-4050-thread-1) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1330372 WARN  (ScheduledTrigger-4050-thread-1) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1331372 WARN  (ScheduledTrigger-4050-thread-1) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1331504 INFO  (Thread-2441) [    ] o.a.s.c.ZkTestServer 
connecting to 127.0.0.1:35637 35637
   [junit4]   2> 1331505 WARN  (Thread-2441) [    ] o.a.s.c.ZkTestServer Watch 
limit violations: 
   [junit4]   2> Maximum concurrent create/delete watches above limit:
   [junit4]   2> 
   [junit4]   2>        3       /solr/aliases.json
   [junit4]   2>        3       /solr/clusterprops.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent data watches above limit:
   [junit4]   2> 
   [junit4]   2>        3       /solr/clusterstate.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent children watches above limit:
   [junit4]   2> 
   [junit4]   2>        3       /solr/live_nodes
   [junit4]   2>        3       /solr/collections
   [junit4]   2> 
   [junit4]   2> 1331505 INFO  
(TEST-OverseerTest.testBadQueueItem-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Ending testBadQueueItem
   [junit4]   2> 1331506 INFO  
(TEST-OverseerTest.testBadQueueItem-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968759840866307-127.0.0.1:35637_solr-n_0000000000) closing
   [junit4]   2> 1331507 WARN  
(OverseerAutoScalingTriggerThread-98968759840866307-127.0.0.1:35637_solr-n_0000000000)
 [    ] o.a.s.c.a.OverseerTriggerThread OverseerTriggerThread woken up but we 
are closed, exiting.
   [junit4]   2> 1331507 INFO  
(OverseerStateUpdate-98968759840866307-127.0.0.1:35637_solr-n_0000000000) [    
] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:35637_solr
   [junit4]   2> 1331511 ERROR (OverseerExitThread) [    ] o.a.s.c.Overseer 
could not read the data
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer_elect/leader
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:301)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1331515 INFO  
(TEST-OverseerTest.testDoubleAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Starting testDoubleAssignment
   [junit4]   2> 1331516 INFO  
(TEST-OverseerTest.testDoubleAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 1331516 INFO  (Thread-2442) [    ] o.a.s.c.ZkTestServer client 
port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 1331516 INFO  (Thread-2442) [    ] o.a.s.c.ZkTestServer 
Starting server
   [junit4]   2> 1331519 ERROR (Thread-2442) [    ] 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> 1331616 INFO  
(TEST-OverseerTest.testDoubleAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer start zk server on port:33445
   [junit4]   2> 1331680 INFO  (zkCallback-1561-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1331680 INFO  (zkCallback-1557-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1331697 INFO  
(TEST-OverseerTest.testDoubleAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer (id=null) closing
   [junit4]   2> 1331698 INFO  
(TEST-OverseerTest.testDoubleAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:33445_solr
   [junit4]   2> 1331699 INFO  
(TEST-OverseerTest.testDoubleAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968760448974852-127.0.0.1:33445_solr-n_0000000000) starting
   [junit4]   2> 1331706 INFO  
(OverseerStateUpdate-98968760448974852-127.0.0.1:33445_solr-n_0000000000) [    
] o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1332210 INFO  (zkCallback-1563-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1332210 INFO  (zkCallback-1561-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1332210 INFO  (zkCallback-1557-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1332217 INFO  (zkCallback-1568-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1332217 INFO  (zkCallback-1557-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1332217 INFO  (zkCallback-1563-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1332421 INFO  (zkCallback-1568-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1332421 INFO  (zkCallback-1557-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1332422 ERROR 
(TEST-OverseerTest.testDoubleAssignment-seed#[6551E3633E376E07]) [    ] 
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> 1332424 INFO  
(TEST-OverseerTest.testDoubleAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer connecting to 127.0.0.1:33445 33445
   [junit4]   2> 1333706 INFO  
(OverseerCollectionConfigSetProcessor-98968760448974852-127.0.0.1:33445_solr-n_0000000000)
 [    ] o.a.s.c.OverseerTaskProcessor According to ZK I 
(id=98968760448974852-127.0.0.1:33445_solr-n_0000000000) am no longer a leader.
   [junit4]   2> 1337485 INFO  (Thread-2442) [    ] o.a.s.c.ZkTestServer 
connecting to 127.0.0.1:33445 33445
   [junit4]   2> 1337487 WARN  (Thread-2442) [    ] o.a.s.c.ZkTestServer Watch 
limit violations: 
   [junit4]   2> Maximum concurrent create/delete watches above limit:
   [junit4]   2> 
   [junit4]   2>        4       /solr/aliases.json
   [junit4]   2>        4       /solr/clusterprops.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent data watches above limit:
   [junit4]   2> 
   [junit4]   2>        4       /solr/clusterstate.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent children watches above limit:
   [junit4]   2> 
   [junit4]   2>        4       /solr/live_nodes
   [junit4]   2>        4       /solr/collections
   [junit4]   2> 
   [junit4]   2> 1337487 INFO  
(TEST-OverseerTest.testDoubleAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Ending testDoubleAssignment
   [junit4]   2> 1337487 INFO  
(TEST-OverseerTest.testDoubleAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968760448974852-127.0.0.1:33445_solr-n_0000000000) closing
   [junit4]   2> 1337487 WARN  
(OverseerAutoScalingTriggerThread-98968760448974852-127.0.0.1:33445_solr-n_0000000000)
 [    ] o.a.s.c.a.OverseerTriggerThread OverseerTriggerThread woken up but we 
are closed, exiting.
   [junit4]   2> 1337487 INFO  
(OverseerStateUpdate-98968760448974852-127.0.0.1:33445_solr-n_0000000000) [    
] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:33445_solr
   [junit4]   2> 1337492 ERROR (OverseerExitThread) [    ] o.a.s.c.Overseer 
could not read the data
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer_elect/leader
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:301)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1337496 INFO  
(TEST-OverseerTest.testReplay-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Starting testReplay
   [junit4]   2> 1337497 INFO  
(TEST-OverseerTest.testReplay-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 1337497 INFO  (Thread-2443) [    ] o.a.s.c.ZkTestServer client 
port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 1337497 INFO  (Thread-2443) [    ] o.a.s.c.ZkTestServer 
Starting server
   [junit4]   2> 1337500 ERROR (Thread-2443) [    ] 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> 1337597 INFO  
(TEST-OverseerTest.testReplay-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer start zk server on port:38237
   [junit4]   2> 1337664 INFO  
(TEST-OverseerTest.testReplay-seed#[6551E3633E376E07]) [    ] o.a.s.c.Overseer 
Overseer (id=null) closing
   [junit4]   2> 1337664 INFO  
(TEST-OverseerTest.testReplay-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:38237_solr
   [junit4]   2> 1337665 INFO  
(TEST-OverseerTest.testReplay-seed#[6551E3633E376E07]) [    ] o.a.s.c.Overseer 
Overseer (id=98968760841011203-127.0.0.1:38237_solr-n_0000000000) starting
   [junit4]   2> 1337873 ERROR 
(TEST-OverseerTest.testReplay-seed#[6551E3633E376E07]) [    ] 
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> 1337874 INFO  
(TEST-OverseerTest.testReplay-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer connecting to 127.0.0.1:38237 38237
   [junit4]   2> 1339672 INFO  
(OverseerCollectionConfigSetProcessor-98968760841011203-127.0.0.1:38237_solr-n_0000000000)
 [    ] o.a.s.c.OverseerTaskProcessor According to ZK I 
(id=98968760841011203-127.0.0.1:38237_solr-n_0000000000) am no longer a leader.
   [junit4]   2> 1343487 INFO  (Thread-2443) [    ] o.a.s.c.ZkTestServer 
connecting to 127.0.0.1:38237 38237
   [junit4]   2> 1343488 WARN  (Thread-2443) [    ] o.a.s.c.ZkTestServer Watch 
limit violations: 
   [junit4]   2> Maximum concurrent create/delete watches above limit:
   [junit4]   2> 
   [junit4]   2>        2       /solr/aliases.json
   [junit4]   2>        2       /solr/clusterprops.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent data watches above limit:
   [junit4]   2> 
   [junit4]   2>        2       /solr/clusterstate.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent children watches above limit:
   [junit4]   2> 
   [junit4]   2>        2       /solr/live_nodes
   [junit4]   2>        2       /solr/collections
   [junit4]   2> 
   [junit4]   2> 1343489 INFO  
(TEST-OverseerTest.testReplay-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Ending testReplay
   [junit4]   2> 1343489 INFO  
(TEST-OverseerTest.testReplay-seed#[6551E3633E376E07]) [    ] o.a.s.c.Overseer 
Overseer (id=98968760841011203-127.0.0.1:38237_solr-n_0000000000) closing
   [junit4]   2> 1343489 WARN  
(OverseerAutoScalingTriggerThread-98968760841011203-127.0.0.1:38237_solr-n_0000000000)
 [    ] o.a.s.c.a.OverseerTriggerThread OverseerTriggerThread woken up but we 
are closed, exiting.
   [junit4]   2> 1343489 INFO  
(OverseerStateUpdate-98968760841011203-127.0.0.1:38237_solr-n_0000000000) [    
] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:38237_solr
   [junit4]   2> 1343492 ERROR (OverseerExitThread) [    ] o.a.s.c.Overseer 
could not read the data
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer_elect/leader
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:301)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1343494 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Starting testOverseerFailure
   [junit4]   2> 1343494 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 1343494 INFO  (Thread-2444) [    ] o.a.s.c.ZkTestServer client 
port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 1343494 INFO  (Thread-2444) [    ] o.a.s.c.ZkTestServer 
Starting server
   [junit4]   2> 1343495 ERROR (Thread-2444) [    ] 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> 1343594 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer start zk server on port:43329
   [junit4]   2> 1343624 INFO  (zkCallback-1581-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1343625 INFO  (zkCallback-1583-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1343628 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer (id=null) closing
   [junit4]   2> 1343628 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:43329_solr
   [junit4]   2> 1343629 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968761233965060-127.0.0.1:43329_solr-n_0000000000) starting
   [junit4]   2> 1343633 INFO  
(OverseerStateUpdate-98968761233965060-127.0.0.1:43329_solr-n_0000000000) [    
] o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1345633 INFO  
(OverseerCollectionConfigSetProcessor-98968761233965060-127.0.0.1:43329_solr-n_0000000000)
 [    ] o.a.s.c.OverseerTaskProcessor According to ZK I 
(id=98968761233965060-127.0.0.1:43329_solr-n_0000000000) am no longer a leader.
   [junit4]   2> 1346297 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968761233965060-127.0.0.1:43329_solr-n_0000000000) closing
   [junit4]   2> 1346297 INFO  
(OverseerStateUpdate-98968761233965060-127.0.0.1:43329_solr-n_0000000000) [    
] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:43329_solr
   [junit4]   2> 1346297 WARN  
(OverseerAutoScalingTriggerThread-98968761233965060-127.0.0.1:43329_solr-n_0000000000)
 [    ] o.a.s.c.a.OverseerTriggerThread OverseerTriggerThread woken up but we 
are closed, exiting.
   [junit4]   2> 1346303 ERROR (OverseerExitThread) [    ] o.a.s.c.Overseer 
could not read the data
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer_elect/leader
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:301)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1346307 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer (id=null) closing
   [junit4]   2> 1346307 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:43329_solr
   [junit4]   2> 1346308 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968761233965061-127.0.0.1:43329_solr-n_0000000001) starting
   [junit4]   2> 1346313 INFO  
(OverseerStateUpdate-98968761233965061-127.0.0.1:43329_solr-n_0000000001) [    
] o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1346971 INFO  (zkCallback-1583-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1346971 INFO  (zkCallback-1581-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1346971 INFO  (zkCallback-1590-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1346972 ERROR 
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
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> 1346973 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer connecting to 127.0.0.1:43329 43329
   [junit4]   2> 1347314 WARN  (ScheduledTrigger-4070-thread-1) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1348313 INFO  
(OverseerCollectionConfigSetProcessor-98968761233965061-127.0.0.1:43329_solr-n_0000000001)
 [    ] o.a.s.c.OverseerTaskProcessor According to ZK I 
(id=98968761233965061-127.0.0.1:43329_solr-n_0000000001) am no longer a leader.
   [junit4]   2> 1348317 WARN  (ScheduledTrigger-4070-thread-2) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1349317 WARN  (ScheduledTrigger-4070-thread-1) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1350318 WARN  (ScheduledTrigger-4070-thread-1) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
   [junit4]   2>        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1351319 WARN  (ScheduledTrigger-4070-thread-1) [    ] 
o.a.s.c.a.TriggerBase Exception updating trigger state 
'/autoscaling/triggerState/.auto_add_replicas'
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for 
/autoscaling/triggerState/.auto_add_replicas
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:1102)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$exists$3(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.exists(SolrZkClient.java:308)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.hasData(ZkDistribStateManager.java:57)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.TriggerBase.saveState(TriggerBase.java:203)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.ScheduledTriggers$ScheduledTrigger.run(ScheduledTriggers.java:486)
   [junit4]   2>        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   [junit4]   2>        at 
java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
   [junit4]   2>        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
   [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> 1352013 INFO  (Thread-2444) [    ] o.a.s.c.ZkTestServer 
connecting to 127.0.0.1:43329 43329
   [junit4]   2> 1352014 WARN  (Thread-2444) [    ] o.a.s.c.ZkTestServer Watch 
limit violations: 
   [junit4]   2> Maximum concurrent create/delete watches above limit:
   [junit4]   2> 
   [junit4]   2>        4       /solr/aliases.json
   [junit4]   2>        4       /solr/clusterprops.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent data watches above limit:
   [junit4]   2> 
   [junit4]   2>        4       /solr/clusterstate.json
   [junit4]   2>        2       /solr/autoscaling.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent children watches above limit:
   [junit4]   2> 
   [junit4]   2>        4       /solr/live_nodes
   [junit4]   2>        4       /solr/collections
   [junit4]   2>        2       /solr/overseer/queue
   [junit4]   2>        2       /solr/autoscaling/events/.auto_add_replicas
   [junit4]   2>        2       /solr/overseer/collection-queue-work
   [junit4]   2>        2       /solr/overseer/queue-work
   [junit4]   2> 
   [junit4]   2> 1352014 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Ending testOverseerFailure
   [junit4]   2> 1352014 INFO  
(TEST-OverseerTest.testOverseerFailure-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968761233965061-127.0.0.1:43329_solr-n_0000000001) closing
   [junit4]   2> 1352014 WARN  
(OverseerAutoScalingTriggerThread-98968761233965061-127.0.0.1:43329_solr-n_0000000001)
 [    ] o.a.s.c.a.OverseerTriggerThread OverseerTriggerThread woken up but we 
are closed, exiting.
   [junit4]   2> 1352014 INFO  
(OverseerStateUpdate-98968761233965061-127.0.0.1:43329_solr-n_0000000001) [    
] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:43329_solr
   [junit4]   2> 1352017 ERROR (OverseerExitThread) [    ] 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:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:301)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1352019 INFO  
(TEST-OverseerTest.testStateChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Starting testStateChange
   [junit4]   2> 1352019 INFO  
(TEST-OverseerTest.testStateChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 1352019 INFO  (Thread-2445) [    ] o.a.s.c.ZkTestServer client 
port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 1352019 INFO  (Thread-2445) [    ] o.a.s.c.ZkTestServer 
Starting server
   [junit4]   2> 1352023 ERROR (Thread-2445) [    ] 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> 1352119 INFO  
(TEST-OverseerTest.testStateChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer start zk server on port:41545
   [junit4]   2> 1352156 INFO  
(TEST-OverseerTest.testStateChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer (id=null) closing
   [junit4]   2> 1352156 INFO  
(TEST-OverseerTest.testStateChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:41545_solr
   [junit4]   2> 1352156 INFO  
(TEST-OverseerTest.testStateChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968761792593923-127.0.0.1:41545_solr-n_0000000000) starting
   [junit4]   2> 1352467 ERROR 
(TEST-OverseerTest.testStateChange-seed#[6551E3633E376E07]) [    ] 
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> 1352468 INFO  
(TEST-OverseerTest.testStateChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer connecting to 127.0.0.1:41545 41545
   [junit4]   2> 1354164 INFO  
(OverseerCollectionConfigSetProcessor-98968761792593923-127.0.0.1:41545_solr-n_0000000000)
 [    ] o.a.s.c.OverseerTaskProcessor According to ZK I 
(id=98968761792593923-127.0.0.1:41545_solr-n_0000000000) am no longer a leader.
   [junit4]   2> 1357509 INFO  (Thread-2445) [    ] o.a.s.c.ZkTestServer 
connecting to 127.0.0.1:41545 41545
   [junit4]   2> 1357510 WARN  (Thread-2445) [    ] o.a.s.c.ZkTestServer Watch 
limit violations: 
   [junit4]   2> Maximum concurrent create/delete watches above limit:
   [junit4]   2> 
   [junit4]   2>        2       /solr/aliases.json
   [junit4]   2>        2       /solr/clusterprops.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent data watches above limit:
   [junit4]   2> 
   [junit4]   2>        2       /solr/clusterstate.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent children watches above limit:
   [junit4]   2> 
   [junit4]   2>        2       /solr/live_nodes
   [junit4]   2>        2       /solr/collections
   [junit4]   2> 
   [junit4]   2> 1357510 INFO  
(TEST-OverseerTest.testStateChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Ending testStateChange
   [junit4]   2> 1357510 INFO  
(TEST-OverseerTest.testStateChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968761792593923-127.0.0.1:41545_solr-n_0000000000) closing
   [junit4]   2> 1357510 WARN  
(OverseerAutoScalingTriggerThread-98968761792593923-127.0.0.1:41545_solr-n_0000000000)
 [    ] o.a.s.c.a.OverseerTriggerThread OverseerTriggerThread woken up but we 
are closed, exiting.
   [junit4]   2> 1357510 INFO  
(OverseerStateUpdate-98968761792593923-127.0.0.1:41545_solr-n_0000000000) [    
] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:41545_solr
   [junit4]   2> 1357514 ERROR (OverseerExitThread) [    ] o.a.s.c.Overseer 
could not read the data
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer_elect/leader
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:301)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1357516 INFO  
(TEST-OverseerTest.testExceptionWhenFlushClusterState-seed#[6551E3633E376E07]) 
[    ] o.a.s.SolrTestCaseJ4 ###Starting testExceptionWhenFlushClusterState
   [junit4]   2> 1357517 INFO  
(TEST-OverseerTest.testExceptionWhenFlushClusterState-seed#[6551E3633E376E07]) 
[    ] o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 1357518 INFO  (Thread-2446) [    ] o.a.s.c.ZkTestServer client 
port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 1357518 INFO  (Thread-2446) [    ] o.a.s.c.ZkTestServer 
Starting server
   [junit4]   2> 1357520 ERROR (Thread-2446) [    ] 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> 1357618 INFO  
(TEST-OverseerTest.testExceptionWhenFlushClusterState-seed#[6551E3633E376E07]) 
[    ] o.a.s.c.ZkTestServer start zk server on port:33827
   [junit4]   2> 1357649 INFO  
(TEST-OverseerTest.testExceptionWhenFlushClusterState-seed#[6551E3633E376E07]) 
[    ] o.a.s.c.Overseer Overseer (id=null) closing
   [junit4]   2> 1357649 INFO  
(TEST-OverseerTest.testExceptionWhenFlushClusterState-seed#[6551E3633E376E07]) 
[    ] o.a.s.c.OverseerElectionContext I am going to be the leader 
127.0.0.1:33827_solr
   [junit4]   2> 1357650 INFO  
(TEST-OverseerTest.testExceptionWhenFlushClusterState-seed#[6551E3633E376E07]) 
[    ] o.a.s.c.Overseer Overseer 
(id=98968762153041923-127.0.0.1:33827_solr-n_0000000000) starting
   [junit4]   2> 1357654 WARN  
(OverseerStateUpdate-98968762153041923-127.0.0.1:33827_solr-n_0000000000) [    
] o.a.s.c.Overseer Exception when process message = {
   [junit4]   2>   "operation":"create",
   [junit4]   2>   "name":"collection1",
   [junit4]   2>   "replicationFactor":"1",
   [junit4]   2>   "numShards":"1",
   [junit4]   2>   "stateFormat":"2",
   [junit4]   2>   "createNodeSet":""}, consider as bad message and poll out 
from the queue
   [junit4]   2> 1357654 ERROR 
(OverseerStateUpdate-98968762153041923-127.0.0.1:33827_solr-n_0000000000) [    
] o.a.s.c.Overseer Exception in Overseer when process message from work queue, 
retrying
   [junit4]   2> org.apache.zookeeper.KeeperException$NoNodeException: 
KeeperErrorCode = NoNode for /collections/collection1/state.json
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:357)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:357)
   [junit4]   2>        at 
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:204)
   [junit4]   2>        at 
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:130)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.processQueueItem(Overseer.java:287)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:170)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1357666 ERROR (Finalizer) [    ] o.a.s.c.CoreContainer 
CoreContainer was not close prior to finalize(), indicates a bug -- POSSIBLE 
RESOURCE LEAK!!!  instance=20164897
   [junit4]   2> 1357666 ERROR (Finalizer) [    ] o.a.s.c.CoreContainer 
CoreContainer was not close prior to finalize(), indicates a bug -- POSSIBLE 
RESOURCE LEAK!!!  instance=30263041
   [junit4]   2> 1357666 ERROR (Finalizer) [    ] o.a.s.c.CoreContainer 
CoreContainer was not close prior to finalize(), indicates a bug -- POSSIBLE 
RESOURCE LEAK!!!  instance=22499669
   [junit4]   2> 1357666 ERROR (Finalizer) [    ] o.a.s.c.CoreContainer 
CoreContainer was not close prior to finalize(), indicates a bug -- POSSIBLE 
RESOURCE LEAK!!!  instance=14788769
   [junit4]   2> 1357666 ERROR (Finalizer) [    ] o.a.s.c.CoreContainer 
CoreContainer was not close prior to finalize(), indicates a bug -- POSSIBLE 
RESOURCE LEAK!!!  instance=3652581
   [junit4]   2> 1357666 ERROR (Finalizer) [    ] o.a.s.c.CoreContainer 
CoreContainer was not close prior to finalize(), indicates a bug -- POSSIBLE 
RESOURCE LEAK!!!  instance=25402477
   [junit4]   2> 1357804 ERROR 
(OverseerStateUpdate-98968762153041923-127.0.0.1:33827_solr-n_0000000000) [    
] o.a.s.c.Overseer Exception in Overseer main queue loop
   [junit4]   2> org.apache.zookeeper.KeeperException$NoNodeException: 
KeeperErrorCode = NoNode for /collections/collection1/state.json
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:357)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:357)
   [junit4]   2>        at 
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:204)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:236)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1357806 WARN  
(OverseerStateUpdate-98968762153041923-127.0.0.1:33827_solr-n_0000000000) [    
] o.a.s.c.Overseer Exception when process message = {
   [junit4]   2>   "operation":"create",
   [junit4]   2>   "name":"collection1",
   [junit4]   2>   "replicationFactor":"1",
   [junit4]   2>   "numShards":"1",
   [junit4]   2>   "stateFormat":"2",
   [junit4]   2>   "createNodeSet":""}, consider as bad message and poll out 
from the queue
   [junit4]   2> 1357806 ERROR 
(OverseerStateUpdate-98968762153041923-127.0.0.1:33827_solr-n_0000000000) [    
] o.a.s.c.Overseer Exception in Overseer when process message from work queue, 
retrying
   [junit4]   2> org.apache.zookeeper.KeeperException$NoNodeException: 
KeeperErrorCode = NoNode for /collections/collection1/state.json
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$create$7(SolrZkClient.java:357)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.create(SolrZkClient.java:357)
   [junit4]   2>        at 
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:204)
   [junit4]   2>        at 
org.apache.solr.cloud.overseer.ZkStateWriter.enqueueUpdate(ZkStateWriter.java:130)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.processQueueItem(Overseer.java:287)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:170)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1357955 ERROR 
(TEST-OverseerTest.testExceptionWhenFlushClusterState-seed#[6551E3633E376E07]) 
[    ] 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> 1357955 INFO  
(TEST-OverseerTest.testExceptionWhenFlushClusterState-seed#[6551E3633E376E07]) 
[    ] o.a.s.c.ZkTestServer connecting to 127.0.0.1:33827 33827
   [junit4]   2> 1359652 INFO  
(OverseerCollectionConfigSetProcessor-98968762153041923-127.0.0.1:33827_solr-n_0000000000)
 [    ] o.a.s.c.OverseerTaskProcessor According to ZK I 
(id=98968762153041923-127.0.0.1:33827_solr-n_0000000000) am no longer a leader.
   [junit4]   2> 1362995 INFO  (Thread-2446) [    ] o.a.s.c.ZkTestServer 
connecting to 127.0.0.1:33827 33827
   [junit4]   2> 1362996 WARN  (Thread-2446) [    ] o.a.s.c.ZkTestServer Watch 
limit violations: 
   [junit4]   2> Maximum concurrent create/delete watches above limit:
   [junit4]   2> 
   [junit4]   2>        2       /solr/aliases.json
   [junit4]   2>        2       /solr/clusterprops.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent data watches above limit:
   [junit4]   2> 
   [junit4]   2>        2       /solr/clusterstate.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent children watches above limit:
   [junit4]   2> 
   [junit4]   2>        2       /solr/overseer/queue
   [junit4]   2>        2       /solr/live_nodes
   [junit4]   2>        2       /solr/collections
   [junit4]   2>        2       /solr/overseer/queue-work
   [junit4]   2> 
   [junit4]   2> 1362996 INFO  
(TEST-OverseerTest.testExceptionWhenFlushClusterState-seed#[6551E3633E376E07]) 
[    ] o.a.s.SolrTestCaseJ4 ###Ending testExceptionWhenFlushClusterState
   [junit4]   2> 1362996 INFO  
(TEST-OverseerTest.testExceptionWhenFlushClusterState-seed#[6551E3633E376E07]) 
[    ] o.a.s.c.Overseer Overseer 
(id=98968762153041923-127.0.0.1:33827_solr-n_0000000000) closing
   [junit4]   2> 1362996 WARN  
(OverseerAutoScalingTriggerThread-98968762153041923-127.0.0.1:33827_solr-n_0000000000)
 [    ] o.a.s.c.a.OverseerTriggerThread OverseerTriggerThread woken up but we 
are closed, exiting.
   [junit4]   2> 1362996 INFO  
(OverseerStateUpdate-98968762153041923-127.0.0.1:33827_solr-n_0000000000) [    
] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:33827_solr
   [junit4]   2> 1363000 ERROR (OverseerExitThread) [    ] 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:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:301)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1363002 INFO  
(TEST-OverseerTest.testShardLeaderChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Starting testShardLeaderChange
   [junit4]   2> 1363002 INFO  
(TEST-OverseerTest.testShardLeaderChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 1363002 INFO  (Thread-2447) [    ] o.a.s.c.ZkTestServer client 
port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 1363002 INFO  (Thread-2447) [    ] o.a.s.c.ZkTestServer 
Starting server
   [junit4]   2> 1363003 ERROR (Thread-2447) [    ] 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> 1363102 INFO  
(TEST-OverseerTest.testShardLeaderChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer start zk server on port:37511
   [junit4]   2> 1363132 INFO  (zkCallback-1620-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1363133 INFO  (zkCallback-1613-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1363134 INFO  (Thread-2448) [    ] o.a.s.c.Overseer Overseer 
(id=null) closing
   [junit4]   2> 1363134 INFO  (Thread-2448) [    ] 
o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:37511_solr
   [junit4]   2> 1363135 INFO  (Thread-2448) [    ] o.a.s.c.Overseer Overseer 
(id=98968762512441347-127.0.0.1:37511_solr-n_0000000000) starting
   [junit4]   2> 1363139 INFO  (Thread-2448) [    ] o.a.s.c.OverseerTest 
Killing overseer.
   [junit4]   2> 1363139 ERROR 
(OverseerAutoScalingTriggerThread-98968762512441347-127.0.0.1:37511_solr-n_0000000000)
 [    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /autoscaling.json
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1327)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$setData$6(SolrZkClient.java:344)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:344)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.setData(ZkDistribStateManager.java:123)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:121)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1363139 ERROR 
(OverseerAutoScalingTriggerThread-98968762512441347-127.0.0.1:37511_solr-n_0000000000)
 [    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /autoscaling.json
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:160)
   [junit4]   2>        at 
org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:62)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:117)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /autoscaling.json
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:153)
   [junit4]   2>        ... 3 more
   [junit4]   2> 1363140 INFO  (Thread-2448) [    ] o.a.s.c.Overseer Overseer 
(id=98968762512441347-127.0.0.1:37511_solr-n_0000000000) closing
   [junit4]   2> 1363140 ERROR 
(OverseerAutoScalingTriggerThread-98968762512441347-127.0.0.1:37511_solr-n_0000000000)
 [    ] o.a.s.c.a.OverseerTriggerThread A ZK error has occurred
   [junit4]   2> java.io.IOException: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /autoscaling.json
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:160)
   [junit4]   2>        at 
org.apache.solr.client.solrj.cloud.autoscaling.DistribStateManager.getAutoScalingConfig(DistribStateManager.java:62)
   [junit4]   2>        at 
org.apache.solr.cloud.autoscaling.OverseerTriggerThread.run(OverseerTriggerThread.java:117)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> Caused by: 
org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = 
Session expired for /autoscaling.json
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.client.solrj.impl.ZkDistribStateManager.getAutoScalingConfig(ZkDistribStateManager.java:153)
   [junit4]   2>        ... 3 more
   [junit4]   2> 1363140 ERROR 
(OverseerStateUpdate-98968762512441347-127.0.0.1:37511_solr-n_0000000000) [    
] o.a.s.c.c.ZkStateReader Error reading cluster properties from zookeeper
   [junit4]   2> java.lang.InterruptedException: sleep interrupted
   [junit4]   2>        at java.lang.Thread.sleep(Native Method)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryDelay(ZkCmdExecutor.java:111)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:70)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkStateReader.loadClusterProperties(ZkStateReader.java:950)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkStateReader.createClusterStateWatchersAndUpdate(ZkStateReader.java:434)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkStateReader.forciblyRefreshAllClusterStateSlow(ZkStateReader.java:315)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:155)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1363145 WARN  
(OverseerStateUpdate-98968762512441347-127.0.0.1:37511_solr-n_0000000000) [    
] o.a.s.c.Overseer Solr cannot talk to ZK, exiting Overseer work queue loop
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /live_nodes
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1532)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getChildren$4(SolrZkClient.java:320)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getChildren(SolrZkClient.java:320)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkStateReader.refreshLiveNodes(ZkStateReader.java:718)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkStateReader.createClusterStateWatchersAndUpdate(ZkStateReader.java:435)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkStateReader.forciblyRefreshAllClusterStateSlow(ZkStateReader.java:315)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:155)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1363145 INFO  
(OverseerStateUpdate-98968762512441347-127.0.0.1:37511_solr-n_0000000000) [    
] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:37511_solr
   [junit4]   2> 1363148 ERROR (OverseerExitThread) [    ] o.a.s.c.Overseer 
could not read the data
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer_elect/leader
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:301)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1363149 INFO  (Thread-2448) [    ] o.a.s.c.Overseer Overseer 
(id=null) closing
   [junit4]   2> 1363149 INFO  (Thread-2448) [    ] 
o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:37511_solr
   [junit4]   2> 1363149 INFO  (Thread-2448) [    ] o.a.s.c.Overseer Overseer 
(id=98968762512441349-127.0.0.1:37511_solr-n_0000000001) starting
   [junit4]   2> 1363152 INFO  
(OverseerStateUpdate-98968762512441349-127.0.0.1:37511_solr-n_0000000001) [    
] o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1363639 INFO  
(TEST-OverseerTest.testShardLeaderChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1363640 INFO  (zkCallback-1613-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1363640 INFO  (zkCallback-1624-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1363640 INFO  (zkCallback-1620-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1363643 INFO  (zkCallback-1629-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1364346 INFO  (zkCallback-1624-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1364346 INFO  (zkCallback-1613-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1364346 INFO  (zkCallback-1620-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1364363 INFO  (zkCallback-1629-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1364549 INFO  
(TEST-OverseerTest.testShardLeaderChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1364551 INFO  (zkCallback-1624-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1364551 INFO  (zkCallback-1613-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1364551 INFO  (zkCallback-1629-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1364552 INFO  (zkCallback-1631-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1364553 WARN  
(OverseerStateUpdate-98968762512441349-127.0.0.1:37511_solr-n_0000000001) [    
] o.a.s.c.o.ClusterStateMutator Collection collection1 already exists. exit
   [junit4]   2> 1364554 INFO  (Thread-2448) [    ] o.a.s.c.OverseerTest 
Killing overseer.
   [junit4]   2> 1364555 INFO  (zkCallback-1613-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1364555 INFO  (zkCallback-1629-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1364556 INFO  (zkCallback-1631-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1364559 INFO  
(TEST-OverseerTest.testShardLeaderChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ShardLeaderElectionContextBase No version found for ephemeral leader 
parent node, won't remove previous leader registration.
   [junit4]   2> 1364559 WARN  (zkCallback-1631-thread-1) [    ] 
o.a.s.c.LeaderElector 
   [junit4]   2> org.apache.solr.common.SolrException: Could not register as 
the leader because creating the ephemeral registration node in ZooKeeper failed
   [junit4]   2>        at 
org.apache.solr.cloud.ShardLeaderElectionContextBase.runLeaderProcess(ElectionContext.java:217)
   [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.access$200(LeaderElector.java:56)
   [junit4]   2>        at 
org.apache.solr.cloud.LeaderElector$ElectionWatcher.process(LeaderElector.java:348)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient$1.lambda$process$0(SolrZkClient.java:262)
   [junit4]   2>        at 
java.util.concurrent.Executors$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$NoNodeException: KeeperErrorCode = NoNode
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.multiInternal(ZooKeeper.java:1006)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.multi(ZooKeeper.java:910)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$multi$9(SolrZkClient.java:550)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.multi(SolrZkClient.java:550)
   [junit4]   2>        at 
org.apache.solr.cloud.ShardLeaderElectionContextBase.lambda$runLeaderProcess$0(ElectionContext.java:201)
   [junit4]   2>        at 
org.apache.solr.common.util.RetryUtil.retryOnThrowable(RetryUtil.java:48)
   [junit4]   2>        at 
org.apache.solr.common.util.RetryUtil.retryOnThrowable(RetryUtil.java:41)
   [junit4]   2>        at 
org.apache.solr.cloud.ShardLeaderElectionContextBase.runLeaderProcess(ElectionContext.java:186)
   [junit4]   2>        ... 11 more
   [junit4]   2> 1364565 INFO  
(TEST-OverseerTest.testShardLeaderChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1364566 INFO  (zkCallback-1613-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1364571 INFO  (zkCallback-1633-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1364574 INFO  (zkCallback-1631-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1364653 WARN  
(OverseerStateUpdate-98968762512441349-127.0.0.1:37511_solr-n_0000000001) [    
] o.a.s.c.Overseer Solr cannot talk to ZK, exiting Overseer main queue loop
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /clusterstate.json
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.setData(ZooKeeper.java:1327)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$setData$6(SolrZkClient.java:344)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.setData(SolrZkClient.java:344)
   [junit4]   2>        at 
org.apache.solr.cloud.overseer.ZkStateWriter.writePendingUpdates(ZkStateWriter.java:220)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.run(Overseer.java:236)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1364654 INFO  
(OverseerStateUpdate-98968762512441349-127.0.0.1:37511_solr-n_0000000001) [    
] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:37511_solr
   [junit4]   2> 1364657 ERROR (OverseerExitThread) [    ] o.a.s.c.Overseer 
could not read the data
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer_elect/leader
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:301)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1365152 INFO  
(OverseerCollectionConfigSetProcessor-98968762512441349-127.0.0.1:37511_solr-n_0000000001)
 [    ] o.a.s.c.OverseerTaskProcessor According to ZK I 
(id=98968762512441349-127.0.0.1:37511_solr-n_0000000001) am no longer a leader.
   [junit4]   2> 1366055 WARN  (zkCallback-1624-thread-2) [    ] 
o.a.s.c.c.ZkStateReader ZooKeeper watch triggered, but Solr cannot talk to ZK: 
[KeeperErrorCode = Session expired for /live_nodes]
   [junit4]   2> 1366056 INFO  (Thread-2448) [    ] o.a.s.c.Overseer Overseer 
(id=98968762512441349-127.0.0.1:37511_solr-n_0000000001) closing
   [junit4]   2> 1366056 WARN  
(OverseerAutoScalingTriggerThread-98968762512441349-127.0.0.1:37511_solr-n_0000000001)
 [    ] o.a.s.c.a.OverseerTriggerThread OverseerTriggerThread woken up but we 
are closed, exiting.
   [junit4]   2> 1366059 INFO  (Thread-2448) [    ] o.a.s.c.Overseer Overseer 
(id=null) closing
   [junit4]   2> 1366060 INFO  (Thread-2448) [    ] 
o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:37511_solr
   [junit4]   2> 1366060 INFO  (Thread-2448) [    ] o.a.s.c.Overseer Overseer 
(id=98968762512441353-127.0.0.1:37511_solr-n_0000000002) starting
   [junit4]   2> 1366062 INFO  
(OverseerStateUpdate-98968762512441353-127.0.0.1:37511_solr-n_0000000002) [    
] o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (2)
   [junit4]   2> 1366064 WARN  
(OverseerStateUpdate-98968762512441353-127.0.0.1:37511_solr-n_0000000002) [    
] o.a.s.c.o.ClusterStateMutator Collection collection1 already exists. exit
   [junit4]   2> 1366179 INFO  (zkCallback-1613-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1366179 INFO  (zkCallback-1631-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1366179 INFO  (zkCallback-1635-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1366180 INFO  (zkCallback-1633-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1366382 INFO  
(TEST-OverseerTest.testShardLeaderChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1366383 INFO  (zkCallback-1635-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1366383 INFO  (zkCallback-1613-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1366383 INFO  (zkCallback-1640-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1366383 INFO  (zkCallback-1633-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1366384 WARN  
(OverseerStateUpdate-98968762512441353-127.0.0.1:37511_solr-n_0000000002) [    
] o.a.s.c.o.ClusterStateMutator Collection collection1 already exists. exit
   [junit4]   2> 1366385 INFO  (zkCallback-1635-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1366385 INFO  (zkCallback-1613-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1366385 INFO  (zkCallback-1633-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1366386 INFO  (zkCallback-1640-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (2) -> (1)
   [junit4]   2> 1366386 WARN  (NIOServerCxn.Factory:0.0.0.0/0.0.0.0:0) [    ] 
o.a.z.s.NIOServerCnxn caught end of stream exception
   [junit4]   2> EndOfStreamException: Unable to read additional data from 
client sessionid 0x15f9b90ad6a0008, likely client has closed socket
   [junit4]   2>        at 
org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:239)
   [junit4]   2>        at 
org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:203)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> 1366392 INFO  
(TEST-OverseerTest.testShardLeaderChange-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1366393 INFO  (zkCallback-1613-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (2)
   [junit4]   2> 1366393 INFO  (zkCallback-1642-thread-1) [    ] o.a.s.c

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

riggerThread OverseerTriggerThread woken up but we are closed, exiting.
   [junit4]   2> 1432558 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Starting testShardAssignment
   [junit4]   2> 1432558 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer STARTING ZK TEST SERVER
   [junit4]   2> 1432559 INFO  (Thread-2453) [    ] o.a.s.c.ZkTestServer client 
port:0.0.0.0/0.0.0.0:0
   [junit4]   2> 1432559 INFO  (Thread-2453) [    ] o.a.s.c.ZkTestServer 
Starting server
   [junit4]   2> 1432562 ERROR (Thread-2453) [    ] 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> 1432659 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer start zk server on port:42879
   [junit4]   2> 1432755 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer (id=null) closing
   [junit4]   2> 1432755 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.OverseerElectionContext I am going to be the leader 127.0.0.1:42879_solr
   [junit4]   2> 1432756 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968767070863363-127.0.0.1:42879_solr-n_0000000000) starting
   [junit4]   2> 1432774 INFO  (zkCallback-1731-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1432779 INFO  (zkCallback-1730-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1432779 INFO  (zkCallback-1737-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (0) -> (1)
   [junit4]   2> 1435802 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ShardLeaderElectionContextBase No version found for ephemeral leader 
parent node, won't remove previous leader registration.
   [junit4]   2> 1435802 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ShardLeaderElectionContextBase No version found for ephemeral leader 
parent node, won't remove previous leader registration.
   [junit4]   2> 1435802 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ShardLeaderElectionContextBase No version found for ephemeral leader 
parent node, won't remove previous leader registration.
   [junit4]   2> 1435803 WARN  (zkCallback-1737-thread-1) [    ] 
o.a.s.c.LeaderElector Our node is no longer in line to be leader
   [junit4]   2> 1435803 WARN  (zkCallback-1737-thread-1) [    ] 
o.a.s.c.LeaderElector Our node is no longer in line to be leader
   [junit4]   2> 1435803 WARN  (zkCallback-1737-thread-1) [    ] 
o.a.s.c.LeaderElector Our node is no longer in line to be leader
   [junit4]   2> 1435804 INFO  (zkCallback-1737-thread-1) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1435804 INFO  (zkCallback-1731-thread-2) [    ] 
o.a.s.c.c.ZkStateReader Updated live nodes from ZooKeeper... (1) -> (0)
   [junit4]   2> 1435804 ERROR 
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
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> 1435806 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.ZkTestServer connecting to 127.0.0.1:42879 42879
   [junit4]   2> 1435829 INFO  (Thread-2453) [    ] o.a.s.c.ZkTestServer 
connecting to 127.0.0.1:42879 42879
   [junit4]   2> 1435830 WARN  (Thread-2453) [    ] o.a.s.c.ZkTestServer Watch 
limit violations: 
   [junit4]   2> Maximum concurrent create/delete watches above limit:
   [junit4]   2> 
   [junit4]   2>        3       /solr/aliases.json
   [junit4]   2>        3       /solr/clusterprops.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent data watches above limit:
   [junit4]   2> 
   [junit4]   2>        3       /solr/clusterstate.json
   [junit4]   2> 
   [junit4]   2> Maximum concurrent children watches above limit:
   [junit4]   2> 
   [junit4]   2>        3       /solr/live_nodes
   [junit4]   2>        3       /solr/collections
   [junit4]   2> 
   [junit4]   2> 1435831 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.SolrTestCaseJ4 ###Ending testShardAssignment
   [junit4]   2> 1435831 INFO  
(TEST-OverseerTest.testShardAssignment-seed#[6551E3633E376E07]) [    ] 
o.a.s.c.Overseer Overseer 
(id=98968767070863363-127.0.0.1:42879_solr-n_0000000000) closing
   [junit4]   2> 1435831 INFO  
(OverseerStateUpdate-98968767070863363-127.0.0.1:42879_solr-n_0000000000) [    
] o.a.s.c.Overseer Overseer Loop exiting : 127.0.0.1:42879_solr
   [junit4]   2> 1435831 WARN  
(OverseerAutoScalingTriggerThread-98968767070863363-127.0.0.1:42879_solr-n_0000000000)
 [    ] o.a.s.c.a.OverseerTriggerThread OverseerTriggerThread woken up but we 
are closed, exiting.
   [junit4]   2> 1435843 ERROR (OverseerExitThread) [    ] o.a.s.c.Overseer 
could not read the data
   [junit4]   2> org.apache.zookeeper.KeeperException$SessionExpiredException: 
KeeperErrorCode = Session expired for /overseer_elect/leader
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:127)
   [junit4]   2>        at 
org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
   [junit4]   2>        at 
org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.lambda$getData$5(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60)
   [junit4]   2>        at 
org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:332)
   [junit4]   2>        at 
org.apache.solr.cloud.Overseer$ClusterStateUpdater.checkIfIamStillLeader(Overseer.java:301)
   [junit4]   2>        at java.lang.Thread.run(Thread.java:748)
   [junit4]   2> NOTE: leaving temporary files on disk at: 
/home/jenkins/workspace/Lucene-Solr-master-Linux/solr/build/solr-core/test/J1/temp/solr.cloud.OverseerTest_6551E3633E376E07-001
   [junit4]   2> NOTE: test params are: 
codec=DummyCompressingStoredFields(storedFieldsFormat=CompressingStoredFieldsFormat(compressionMode=DUMMY,
 chunkSize=7, maxDocsPerChunk=1012, blockSize=789), 
termVectorsFormat=CompressingTermVectorsFormat(compressionMode=DUMMY, 
chunkSize=7, blockSize=789)), 
sim=Asserting(org.apache.lucene.search.similarities.AssertingSimilarity@1c1acd9),
 locale=bg, timezone=Antarctica/Palmer
   [junit4]   2> NOTE: Linux 4.10.0-37-generic i386/Oracle Corporation 
1.8.0_144 (32-bit)/cpus=8,threads=1,free=115546056,total=399642624
   [junit4]   2> NOTE: All tests run in this JVM: 
[TestDocBasedVersionConstraints, TestCloudPseudoReturnFields, EnumFieldTest, 
TestWriterPerf, TestBM25SimilarityFactory, SaslZkACLProviderTest, 
DistributedVersionInfoTest, SynonymTokenizerTest, 
DistributedFacetPivotLargeTest, OpenExchangeRatesOrgProviderTest, 
TestXIncludeConfig, TestQuerySenderNoQuery, TestAnalyzedSuggestions, 
TestPayloadScoreQParserPlugin, ZkSolrClientTest, NotRequiredUniqueKeyTest, 
BadIndexSchemaTest, TestRequestStatusCollectionAPI, TestClusterProperties, 
TestInfoStreamLogging, BadCopyFieldTest, SpatialHeatmapFacetsTest, 
TestComplexPhraseLeadingWildcard, TestScoreJoinQPNoScore, 
DistributedDebugComponentTest, CloudMLTQParserTest, SuggesterTSTTest, 
TestTrieFacet, HdfsChaosMonkeySafeLeaderTest, TestSha256AuthenticationProvider, 
DataDrivenBlockJoinTest, CloudExitableDirectoryReaderTest, 
DistributedIntervalFacetingTest, TestRTimerTree, TestClusterStateMutator, 
SmileWriterTest, NodeLostTriggerTest, BigEndianAscendingWordSerializerTest, 
TestSolrFieldCacheBean, ZkCLITest, AnalyticsMergeStrategyTest, TestRangeQuery, 
MoreLikeThisHandlerTest, PingRequestHandlerTest, TestRTGBase, 
SolrIndexSplitterTest, TestManagedSchemaThreadSafety, TestConfigSetProperties, 
PreAnalyzedFieldTest, TestPullReplicaErrorHandling, MoveReplicaTest, 
TestSolrQueryParser, TestDownShardTolerantSearch, DeleteShardTest, 
TestCloudManagedSchema, ShardRoutingCustomTest, TestSchemalessBufferedUpdates, 
HdfsLockFactoryTest, TestFieldCacheVsDocValues, TestPolicyCloud, 
ShowFileRequestHandlerTest, TestRebalanceLeaders, 
DocumentAnalysisRequestHandlerTest, SolrShardReporterTest, TestJettySolrRunner, 
TestJavabinTupleStreamParser, TestFastWriter, SuggesterFSTTest, 
DeleteLastCustomShardedReplicaTest, AddReplicaTest, SpellingQueryConverterTest, 
TestRestManager, TestShortCircuitedRequests, TestFieldSortValues, AssignTest, 
DOMUtilTest, LeaderFailoverAfterPartitionTest, BlockJoinFacetDistribTest, 
CdcrBidirectionalTest, SolrRequestParserTest, UtilsToolTest, 
IgnoreCommitOptimizeUpdateProcessorFactoryTest, 
TestDynamicFieldCollectionResource, DistributedQueryComponentOptimizationTest, 
TestMacroExpander, BinaryUpdateRequestHandlerTest, OpenCloseCoreStressTest, 
TestMaxScoreQueryParser, HealthCheckHandlerTest, TestDFISimilarityFactory, 
PrimUtilsTest, TestHashQParserPlugin, TestBlobHandler, TestPerFieldSimilarity, 
SignatureUpdateProcessorFactoryTest, TestNumericRangeQuery64, 
HighlighterMaxOffsetTest, TestBackupRepositoryFactory, PolyFieldTest, 
SolrGangliaReporterTest, TestReloadDeadlock, TestCollationField, 
CoreAdminRequestStatusTest, ChaosMonkeySafeLeaderWithPullReplicasTest, 
ConvertedLegacyTest, CollectionTooManyReplicasTest, TestExactSharedStatsCache, 
CurrencyFieldTypeTest, UninvertDocValuesMergePolicyTest, 
CollectionsAPIDistributedZkTest, RestartWhileUpdatingTest, NumericFieldsTest, 
TestLocalFSCloudBackupRestore, OutOfBoxZkACLAndCredentialsProvidersTest, 
TestSimpleTrackingShardHandler, ZkFailoverTest, TestManagedStopFilterFactory, 
SolrIndexConfigTest, TestAtomicUpdateErrorCases, FullHLLTest, TestDocSet, 
OverseerTest]
   [junit4] Completed [389/749 (1!)] on J1 in 116.63s, 13 tests, 1 failure, 1 
skipped <<< FAILURES!

[...truncated 44280 lines...]
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