Hi, I am having troubles understanding the reason for that NPE.
First you could try removing the line #102 in HttpClientUtility so that logging does not prevent creation of the http client in SyncStrategy. -- Sami Siren On Wed, Sep 19, 2012 at 5:29 PM, Markus Jelsma <markus.jel...@openindex.io> wrote: > Hi, > > Since the 2012-09-17 11:10:41 build shards start to have trouble coming back > online. When i restart one node the slices on the other nodes are throwing > exceptions and cannot be queried. I'm not sure how to remedy the problem but > stopping a node or restarting it a few times seems to help it. The problem is > when i restart a node, and it happens, i must not restart another node > because that may trigger other slices becoming unavailable. > > Here are some parts of the log: > > 2012-09-19 14:13:18,149 ERROR [solr.cloud.RecoveryStrategy] - > [RecoveryThread] - : Recovery failed - trying again... core=oi_i > 2012-09-19 14:13:25,818 WARN [solr.cloud.RecoveryStrategy] - > [main-EventThread] - : Stopping recovery for > zkNodeName=nl10.host:8080_solr_oi_icore=oi_i > 2012-09-19 14:13:44,497 WARN [solr.cloud.RecoveryStrategy] - [Thread-4] - : > Stopping recovery for zkNodeName=nl10.host:8080_solr_oi_jcore=oi_j > 2012-09-19 14:14:00,321 ERROR [solr.cloud.RecoveryStrategy] - > [RecoveryThread] - : Error while trying to recover. > core=oi_i:org.apache.solr.common.SolrException: We are not the leader > at > org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:402) > at > org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:182) > at > org.apache.solr.cloud.RecoveryStrategy.sendPrepRecoveryCmd(RecoveryStrategy.java:199) > at > org.apache.solr.cloud.RecoveryStrategy.doRecovery(RecoveryStrategy.java:388) > at > org.apache.solr.cloud.RecoveryStrategy.run(RecoveryStrategy.java:220) > > 2012-09-19 14:14:00,321 ERROR [solr.cloud.RecoveryStrategy] - > [RecoveryThread] - : Recovery failed - trying again... core=oi_i > 2012-09-19 14:14:00,321 ERROR [solr.cloud.RecoveryStrategy] - > [RecoveryThread] - : Recovery failed - max retries exceeded. core=oi_i > 2012-09-19 14:14:00,321 ERROR [solr.cloud.RecoveryStrategy] - > [RecoveryThread] - : Recovery failed - I give up. core=oi_i > 2012-09-19 14:14:00,333 WARN [solr.cloud.RecoveryStrategy] - [RecoveryThread] > - : Stopping recovery for zkNodeName=nl10.host:8080_solr_oi_icore=oi_i > ERROR [solr.cloud.SyncStrategy] - [main-EventThread] - : Sync request error: > java.lang.NullPointerException > ERROR [solr.cloud.SyncStrategy] - [main-EventThread] - : > http://nl10.host:8080/solr/oi_i/: Could not tell a replica to > recover:java.lang.NullPointerException > at org.slf4j.impl.Log4jLoggerAdapter.info(Log4jLoggerAdapter.java:305) > at > org.apache.solr.client.solrj.impl.HttpClientUtil.createClient(HttpClientUtil.java:102) > at > org.apache.solr.client.solrj.impl.HttpSolrServer.<init>(HttpSolrServer.java:155) > at > org.apache.solr.client.solrj.impl.HttpSolrServer.<init>(HttpSolrServer.java:128) > at org.apache.solr.cloud.SyncStrategy$1.run(SyncStrategy.java:262) > at > org.apache.solr.cloud.SyncStrategy.requestRecovery(SyncStrategy.java:272) > at org.apache.solr.cloud.SyncStrategy.syncToMe(SyncStrategy.java:203) > at > org.apache.solr.cloud.SyncStrategy.syncReplicas(SyncStrategy.java:125) > at org.apache.solr.cloud.SyncStrategy.sync(SyncStrategy.java:87) > at > org.apache.solr.cloud.ShardLeaderElectionContext.runLeaderProcess(ElectionContext.java:169) > at > org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:158) > at > org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:102) > at > org.apache.solr.cloud.LeaderElector.joinElection(LeaderElector.java:275) > at > org.apache.solr.cloud.ShardLeaderElectionContext.rejoinLeaderElection(ElectionContext.java:326) > at > org.apache.solr.cloud.ShardLeaderElectionContext.runLeaderProcess(ElectionContext.java:159) > at > org.apache.solr.cloud.LeaderElector.runIamLeaderProcess(LeaderElector.java:158) > at > org.apache.solr.cloud.LeaderElector.checkIfIamLeader(LeaderElector.java:102) > at > org.apache.solr.cloud.LeaderElector.access$000(LeaderElector.java:56) > at > org.apache.solr.cloud.LeaderElector$1.process(LeaderElector.java:131) > at > org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:526) > at > org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:502) > > ERROR [apache.zookeeper.ClientCnxn] - [main-EventThread] - : Error while > calling watcher > java.lang.NullPointerException > at > org.apache.solr.cloud.LeaderElector$1.process(LeaderElector.java:139) > at > org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:526) > at > org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:502) > ERROR [apache.zookeeper.ClientCnxn] - [main-EventThread] - : Error while > calling watcher > java.lang.NullPointerException > at > org.apache.solr.common.cloud.ZkStateReader$3.process(ZkStateReader.java:238) > at > org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:526) > at > org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:502) > ERROR [apache.zookeeper.ClientCnxn] - [main-EventThread] - : Error while > calling watcher > java.lang.NullPointerException > at > org.apache.solr.common.cloud.ZkStateReader$2.process(ZkStateReader.java:189) > at > org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:526) > at > org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:502) > 2012-09-19 14:14:05,304 WARN [solr.core.CoreContainer] - [main] - : Log > watching is not yet implemented for log4j > 2012-09-19 14:14:08,504 WARN [solr.core.SolrCore] - [main] - : New index > directory detected: old=null > new=/opt/solr/cores/oi_j/data/index.20120823134824608 > 2012-09-19 14:14:10,895 WARN [solr.core.SolrCore] - [main] - : New index > directory detected: old=null new=/opt/solr/cores/oi_i/data/index/ > 2012-09-19 14:14:41,203 ERROR [solr.cloud.ZkController] - [main] - : Error > getting leader from zk > org.apache.solr.common.SolrException: Could not get leader props > at > org.apache.solr.cloud.ZkController.getLeaderProps(ZkController.java:762) > at > org.apache.solr.cloud.ZkController.getLeaderProps(ZkController.java:722) > at org.apache.solr.cloud.ZkController.getLeader(ZkController.java:687) > at org.apache.solr.cloud.ZkController.register(ZkController.java:626) > at org.apache.solr.cloud.ZkController.register(ZkController.java:576) > at > org.apache.solr.core.CoreContainer.registerInZk(CoreContainer.java:721) > at org.apache.solr.core.CoreContainer.register(CoreContainer.java:705) > at org.apache.solr.core.CoreContainer.load(CoreContainer.java:547) > at org.apache.solr.core.CoreContainer.load(CoreContainer.java:365) > at > org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:314) > 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(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:616) > at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) > at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) > Caused by: org.apache.zookeeper.KeeperException$NoNodeException: > KeeperErrorCode = NoNode for /collections/oi/leaders/shard9 > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:102) > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:42) > at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:927) > at > org.apache.solr.common.cloud.SolrZkClient$7.execute(SolrZkClient.java:301) > at > org.apache.solr.common.cloud.SolrZkClient$7.execute(SolrZkClient.java:298) > at > org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:67) > at > org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:298) > at > org.apache.solr.cloud.ZkController.getLeaderProps(ZkController.java:740) > ... 37 more > 2012-09-19 14:14:41,239 ERROR [solr.core.CoreContainer] - [main] - : > :org.apache.solr.common.SolrException: Error getting leader from zk > at org.apache.solr.cloud.ZkController.getLeader(ZkController.java:711) > at org.apache.solr.cloud.ZkController.register(ZkController.java:626) > at org.apache.solr.cloud.ZkController.register(ZkController.java:576) > at > org.apache.solr.core.CoreContainer.registerInZk(CoreContainer.java:721) > at org.apache.solr.core.CoreContainer.register(CoreContainer.java:705) > at org.apache.solr.core.CoreContainer.load(CoreContainer.java:547) > at org.apache.solr.core.CoreContainer.load(CoreContainer.java:365) > at > org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:314) > 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(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:616) > at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) > at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) > Caused by: org.apache.solr.common.SolrException: Could not get leader props > at > org.apache.solr.cloud.ZkController.getLeaderProps(ZkController.java:762) > at > org.apache.solr.cloud.ZkController.getLeaderProps(ZkController.java:722) > at org.apache.solr.cloud.ZkController.getLeader(ZkController.java:687) > ... 35 more > Caused by: org.apache.zookeeper.KeeperException$NoNodeException: > KeeperErrorCode = NoNode for /collections/oi/leaders/shard9 > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:102) > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:42) > at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:927) > at > org.apache.solr.common.cloud.SolrZkClient$7.execute(SolrZkClient.java:301) > at > org.apache.solr.common.cloud.SolrZkClient$7.execute(SolrZkClient.java:298) > at > org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:67) > at > org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:298) > at > org.apache.solr.cloud.ZkController.getLeaderProps(ZkController.java:740) > ... 37 more > 2012-09-19 14:14:41,239 ERROR [solr.core.CoreContainer] - [main] - : > null:org.apache.solr.common.cloud.ZooKeeperException: > at > org.apache.solr.core.CoreContainer.registerInZk(CoreContainer.java:744) > at org.apache.solr.core.CoreContainer.register(CoreContainer.java:705) > at org.apache.solr.core.CoreContainer.load(CoreContainer.java:547) > at org.apache.solr.core.CoreContainer.load(CoreContainer.java:365) > at > org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:314) > 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(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:616) > at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) > at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) > Caused by: org.apache.solr.common.SolrException: Error getting leader from zk > at org.apache.solr.cloud.ZkController.getLeader(ZkController.java:711) > at org.apache.solr.cloud.ZkController.register(ZkController.java:626) > at org.apache.solr.cloud.ZkController.register(ZkController.java:576) > at > org.apache.solr.core.CoreContainer.registerInZk(CoreContainer.java:721) > ... 32 more > Caused by: org.apache.solr.common.SolrException: Could not get leader props > at > org.apache.solr.cloud.ZkController.getLeaderProps(ZkController.java:762) > at > org.apache.solr.cloud.ZkController.getLeaderProps(ZkController.java:722) > at org.apache.solr.cloud.ZkController.getLeader(ZkController.java:687) > ... 35 more > Caused by: org.apache.zookeeper.KeeperException$NoNodeException: > KeeperErrorCode = NoNode for /collections/oi/leaders/shard9 > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:102) > at > org.apache.zookeeper.KeeperException.create(KeeperException.java:42) > at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:927) > at > org.apache.solr.common.cloud.SolrZkClient$7.execute(SolrZkClient.java:301) > at > org.apache.solr.common.cloud.SolrZkClient$7.execute(SolrZkClient.java:298) > at > org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:67) > at > org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:298) > at > org.apache.solr.cloud.ZkController.getLeaderProps(ZkController.java:740) > ... 37 more > > This does not happen with an older build of september 11th. > > Thanks, > Markus
