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https://issues.apache.org/jira/browse/SOLR-3993?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13503023#comment-13503023
]
Po Rui commented on SOLR-3993:
------------------------------
To Werner:
1)are you sure your solr is 4.0 rather than 4.0alpha or 4.0beta? generally,
the situation you described lead a lot of waitForReplicasComeup log produced.
if no exception it will stop 3 mins latter. those logs due to zookeeper keep
those old server's info in clustersate.
2) above situation both refer to zookeeper leader reelection.all solr service
can't work before this election procedure over. the solr node may die if the
election time over the solr connect-zookeeper retry time. so the problem is
hard to deal with since the zook leader reelection procedure is uncontrollable.
> SolrCloud leader election on single node stucks the initialization
> ------------------------------------------------------------------
>
> Key: SOLR-3993
> URL: https://issues.apache.org/jira/browse/SOLR-3993
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 4.0
> Environment: Windows 7, Tomcat 6
> Reporter: Alexey Kudinov
> Assignee: Mark Miller
> Fix For: 4.1, 5.0
>
>
> setup:
> 1 node, 4 cores, 2 shards.
> 15 documents indexed.
> problem:
> init stage times out.
> probable cause:
> According to the init flow, cores are initialized one by one synchronously.
> Actually, the main thread waits
> ShardLeaderElectionContext.waitForReplicasToComeUp until retry threshold,
> while replica cores are not yet initialized, in other words there is no
> chance other replicas go up in the meanwhile.
> stack trace:
> Thread [main] (Suspended)
> owns: HashMap<K,V> (id=3876)
> owns: StandardContext (id=3877)
> owns: HashMap<K,V> (id=3878)
> owns: StandardHost (id=3879)
> owns: StandardEngine (id=3880)
> owns: Service[] (id=3881)
> Thread.sleep(long) line: not available [native method]
> ShardLeaderElectionContext.waitForReplicasToComeUp(boolean, String)
> line: 298
> ShardLeaderElectionContext.runLeaderProcess(boolean) line: 143
> LeaderElector.runIamLeaderProcess(ElectionContext, boolean) line: 152
> LeaderElector.checkIfIamLeader(int, ElectionContext, boolean) line: 96
> LeaderElector.joinElection(ElectionContext) line: 262
> ZkController.joinElection(CoreDescriptor, boolean) line: 733
> ZkController.register(String, CoreDescriptor, boolean, boolean) line:
> 566
> ZkController.register(String, CoreDescriptor) line: 532
> CoreContainer.registerInZk(SolrCore) line: 709
> CoreContainer.register(String, SolrCore, boolean) line: 693
> CoreContainer.load(String, InputSource) line: 535
> CoreContainer.load(String, File) line: 356
> CoreContainer$Initializer.initialize() line: 308
> SolrDispatchFilter.init(FilterConfig) line: 107
> ApplicationFilterConfig.getFilter() line: 295
> ApplicationFilterConfig.setFilterDef(FilterDef) line: 422
> ApplicationFilterConfig.<init>(Context, FilterDef) line: 115
> StandardContext.filterStart() line: 4072
> StandardContext.start() line: 4726
> StandardHost(ContainerBase).addChildInternal(Container) line: 799
> StandardHost(ContainerBase).addChild(Container) line: 779
> StandardHost.addChild(Container) line: 601
> HostConfig.deployDescriptor(String, File, String) line: 675
> HostConfig.deployDescriptors(File, String[]) line: 601
> HostConfig.deployApps() line: 502
> HostConfig.start() line: 1317
> HostConfig.lifecycleEvent(LifecycleEvent) line: 324
> LifecycleSupport.fireLifecycleEvent(String, Object) line: 142
> StandardHost(ContainerBase).start() line: 1065
> StandardHost.start() line: 840
> StandardEngine(ContainerBase).start() line: 1057
> StandardEngine.start() line: 463
> StandardService.start() line: 525
> StandardServer.start() line: 754
> Catalina.start() line: 595
> NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not
> available [native method]
> NativeMethodAccessorImpl.invoke(Object, Object[]) line: not available
> DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: not
> available
> Method.invoke(Object, Object...) line: not available
> Bootstrap.start() line: 289
> Bootstrap.main(String[]) line: 414
>
> After a while, the session times out and following exception appears:
> Oct 25, 2012 1:16:56 PM org.apache.solr.cloud.ShardLeaderElectionContext
> waitForReplicasToComeUp
> INFO: Waiting until we see more replicas up: total=2 found=0 timeoutin=-95
> Oct 25, 2012 1:16:56 PM org.apache.solr.cloud.ShardLeaderElectionContext
> waitForReplicasToComeUp
> INFO: Was waiting for replicas to come up, but they are taking too long -
> assuming they won't come back till later
> Oct 25, 2012 1:16:56 PM org.apache.solr.common.SolrException log
> SEVERE: Errir checking for the number of election
> participants:org.apache.zookeeper.KeeperException$SessionExpiredException:
> KeeperErrorCode = Session expired for
> /collections/collection1/leader_elect/shard2/election
> at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:118)
> at
> org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
> at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:1249)
> at
> org.apache.solr.common.cloud.SolrZkClient$6.execute(SolrZkClient.java:227)
> at
> org.apache.solr.common.cloud.SolrZkClient$6.execute(SolrZkClient.java:224)
> at
> org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:63)
> at
> org.apache.solr.common.cloud.SolrZkClient.getChildren(SolrZkClient.java:224)
> at
> org.apache.solr.cloud.ShardLeaderElectionContext.waitForReplicasToComeUp(ElectionContext.java:276)
> at
> org.apache.solr.cloud.ShardLeaderElectionContext.runLeaderProcess(ElectionContext.java:143)
> at
> org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:152)
> at
> org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:96)
> at
> org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:262)
> at
> org.apache.solr.cloud.ZkController.joinElection(ZkController.java:733)
> at org.apache.solr.cloud.ZkController.register(ZkController.java:566)
> at org.apache.solr.cloud.ZkController.register(ZkController.java:532)
> at
> org.apache.solr.core.CoreContainer.registerInZk(CoreContainer.java:709)
> at org.apache.solr.core.CoreContainer.register(CoreContainer.java:693)
> at org.apache.solr.core.CoreContainer.load(CoreContainer.java:535)
> at org.apache.solr.core.CoreContainer.load(CoreContainer.java:356)
> at
> org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:308)
> at
> org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:107)
> at
> org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295)
> at
> org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
> at
> org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
> at
> org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4072)
> at
> org.apache.catalina.core.StandardContext.start(StandardContext.java:4726)
> at
> org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
> at
> org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
> at
> org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
> at
> org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:675)
> at
> org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:601)
> at
> org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
> at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)
> at
> org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
> at
> org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
> at
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)
> at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
> at
> org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
> at
> org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
> at
> org.apache.catalina.core.StandardService.start(StandardService.java:525)
> at
> org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
> at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
> at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
> Followed by:
> Oct 25, 2012 1:17:27 PM org.apache.solr.cloud.RecoveryStrategy doRecovery
> SEVERE: Recovery failed - trying again... core=collection1
> Oct 25, 2012 1:18:32 PM org.apache.solr.common.SolrException log
> SEVERE: Error while trying to recover. core=collection1
> Oct 25, 2012 1:18:32 PM org.apache.solr.common.SolrException log
> SEVERE: Error while trying to recover.
> core=collection1:org.apache.solr.common.SolrException: No registered leader
> was found, collection:collection1 slice:shard1
> at
> org.apache.solr.common.cloud.ZkStateReader.getLeaderProps(ZkStateReader.java:413)
> at
> org.apache.solr.common.cloud.ZkStateReader.getLeaderProps(ZkStateReader.java:399)
> at
> org.apache.solr.cloud.RecoveryStrategy.doRecovery(RecoveryStrategy.java:318)
> at
> org.apache.solr.cloud.RecoveryStrategy.run(RecoveryStrategy.java:220)
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