org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /DRUID_PATH/indexer/leaderLatchPath/_c_3c32cd34-4370-4e26-922d-a9b24afa4a91-lock-0000102217

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  • GitHub comment 2#74426804
    via GitHub by sharonpriel
    ,
  • When a container departs the cluster the admin will try to redeploy any modules that container was running. If the stream was *destroyed* and the container exited before it had the chance to clean up its deployments under {{/xd/deployments/modules}} (for example, with {{kill -9}}) the following NPE occurs: {noformat} java.lang.NullPointerException at org.springframework.xd.dirt.server.ContainerListener.loadStream(ContainerListener.java:347) at org.springframework.xd.dirt.server.ContainerListener.onChildLeft(ContainerListener.java:403) at org.springframework.xd.dirt.server.ContainerListener.childEvent(ContainerListener.java:158) at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:494) at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:488) at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:92) at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:293) at org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:83) at org.apache.curator.framework.recipes.cache.PathChildrenCache.callListeners(PathChildrenCache.java:485) at org.apache.curator.framework.recipes.cache.EventOperation.invoke(EventOperation.java:35) at org.apache.curator.framework.recipes.cache.PathChildrenCache$11.run(PathChildrenCache.java:755) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:724) {noformat} If the stream was *undeployed* the following stack appears: {noformat} 15:13:06,002 ERROR ContainersPathChildrenCache-0 cache.PathChildrenCache:550 - java.lang.RuntimeException: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /xd/deployments/streams/t0 at org.springframework.xd.dirt.server.ContainerListener.onChildLeft(ContainerListener.java:468) at org.springframework.xd.dirt.server.ContainerListener.childEvent(ContainerListener.java:159) at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:494) at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:488) at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:92) at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:293) at org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:83) at org.apache.curator.framework.recipes.cache.PathChildrenCache.callListeners(PathChildrenCache.java:485) at org.apache.curator.framework.recipes.cache.EventOperation.invoke(EventOperation.java:35) at org.apache.curator.framework.recipes.cache.PathChildrenCache$11.run(PathChildrenCache.java:755) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:744) Caused by: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /xd/deployments/streams/t0 at org.apache.zookeeper.KeeperException.create(KeeperException.java:111) at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1155) at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:302) at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:291) at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:107) at org.apache.curator.framework.imps.GetDataBuilderImpl.pathInForeground(GetDataBuilderImpl.java:287) at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:279) at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:41) at org.springframework.xd.dirt.server.ContainerListener.loadStream(ContainerListener.java:358) at org.springframework.xd.dirt.server.ContainerListener.onChildLeft(ContainerListener.java:417) ... 16 more {noformat} In short, this logic makes the assumption that the stream is still present and deployed. It needs to take into account the fact that neither assumption can be made.
    via by Patrick Peralta,
  • During the slow network tests the user undeployed a stream and then immediately redeployed the same stream to get the modules on different containers. The deployment failed as reflected in the stacktrace below from the admin server, however the the shell did not report an error and the user could not deploy the stream. * The stream in question is "http|log" * The Shell did not report any error. * Stream list does show the state of the stream as failed. * executing a stream deploy fails with the following error: ** Command failed org.springframework.xd.rest.client.impl.SpringXDException: The stream named 'foo' is already deployed * Undeploy and deploy of the stream worked. 17:54:39,487 INFO Deployer server.StreamDeploymentListener - Deployment status for stream 'foo': DeploymentStatus{state=failed,error(s)=org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /xd/deployments/modules/allocated/73f0a93d-e213-414d-8337-6c04409ec210/foo.source.http.1/status at org.apache.zookeeper.KeeperException.create(KeeperException.java:111) at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1155) at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:302) at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:291) at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:107) at org.apache.curator.framework.imps.GetDataBuilderImpl.pathInForeground(GetDataBuilderImpl.java:287) at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:279) at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:41) at org.springframework.xd.dirt.server.ModuleDeploymentWriter.writeDeployment(ModuleDeploymentWriter.java:205) at org.springframework.xd.dirt.server.ModuleDeploymentWriter.writeDeployment(ModuleDeploymentWriter.java:163) at org.springframework.xd.dirt.server.StreamDeploymentListener.deployStream(StreamDeploymentListener.java:166) at org.springframework.xd.dirt.server.StreamDeploymentListener.onChildAdded(StreamDeploymentListener.java:100) at org.springframework.xd.dirt.server.InitialDeploymentListener$EventHandler.call(InitialDeploymentListener.java:217) at org.springframework.xd.dirt.server.InitialDeploymentListener$EventHandler.call(InitialDeploymentListener.java:186) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) } 17:54:39,496 INFO Deployer server.StreamDeploymentListener - Stream Stream{name='foo'} deployment attempt complete
    via by Glenn renfro,
  • XD container loose connection with Zookeeper. I'm in a distributed environnement: - 3 XD container nodes (1.2.1) - 1 XD admin - 3 Zookeeper - 3 RabbitMQ - 3 Redis/Sentinel Logs: *zookeeper.log* {noformat} 2015-11-25 06:53:07,235 [myid:3] - INFO [QuorumPeer[myid=3]/0:0:0:0:0:0:0:0:2181:ZooKeeperServer@617] - Established session 0x251250651910006 with negotiated timeout 40000 for client /172.20.1.9:58070 2015-11-25 06:54:08,525 [myid:3] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@357] - caught end of stream exception EndOfStreamException: Unable to read additional data from client sessionid 0x251250651910006, likely client has closed socket at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:228) at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:208) at java.lang.Thread.run(Thread.java:745) 2015-11-25 06:54:08,621 [myid:3] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1007] - Closed socket connection for client /172.20.1.9:58070 which had sessionid 0x251250651910006 {noformat} *container.log* {noformat} 2015-11-25T06:53:37+0100 1.2.1.RELEASE ERROR main-EventThread curator.ConnectionState - Connection timed out for connection string (172.20.1.1:2181,172.20.1.8:2181,172.20.1.9:2181) and timeout (30000) / elapsed (34187) org.apache.curator.CuratorConnectionLossException: KeeperErrorCode = ConnectionLoss at org.apache.curator.ConnectionState.checkTimeouts(ConnectionState.java:198) [curator-client-2.6.0.jar:na] at org.apache.curator.ConnectionState.getZooKeeper(ConnectionState.java:88) [curator-client-2.6.0.jar:na] at org.apache.curator.CuratorZookeeperClient.getZooKeeper(CuratorZookeeperClient.java:115) [curator-client-2.6.0.jar:na] at org.apache.curator.framework.imps.CuratorFrameworkImpl.getZooKeeper(CuratorFrameworkImpl.java:474) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:302) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:291) [curator-framework-2.6.0.jar:na] at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:107) [curator-client-2.6.0.jar:na] at org.apache.curator.framework.imps.GetDataBuilderImpl.pathInForeground(GetDataBuilderImpl.java:287) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:279) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:41) [curator-framework-2.6.0.jar:na] at org.springframework.xd.dirt.server.container.DeploymentListener$StreamModuleWatcher.process(DeploymentListener.java:596) [spring-xd-dirt-1.2.1.RELEASE.jar:1.2.1.RELEASE] at org.apache.curator.framework.imps.NamespaceWatcher.process(NamespaceWatcher.java:67) [curator-framework-2.6.0.jar:na] at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:522) [zookeeper-3.4.6.jar:3.4.6-1569965] at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498) [zookeeper-3.4.6.jar:3.4.6-1569965] 2015-11-25T06:53:37+0100 1.2.1.RELEASE ERROR CuratorFramework-0 curator.ConnectionState - Connection timed out for connection string (172.20.1.1:2181,172.20.1.8:2181,172.20.1.9:2181) and timeout (30000) / elapsed (34189) org.apache.curator.CuratorConnectionLossException: KeeperErrorCode = ConnectionLoss at org.apache.curator.ConnectionState.checkTimeouts(ConnectionState.java:198) [curator-client-2.6.0.jar:na] at org.apache.curator.ConnectionState.getZooKeeper(ConnectionState.java:88) [curator-client-2.6.0.jar:na] at org.apache.curator.CuratorZookeeperClient.getZooKeeper(CuratorZookeeperClient.java:115) [curator-client-2.6.0.jar:na] at org.apache.curator.framework.imps.CuratorFrameworkImpl.performBackgroundOperation(CuratorFrameworkImpl.java:793) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.CuratorFrameworkImpl.backgroundOperationsLoop(CuratorFrameworkImpl.java:779) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.CuratorFrameworkImpl.access$400(CuratorFrameworkImpl.java:58) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.CuratorFrameworkImpl$4.call(CuratorFrameworkImpl.java:265) [curator-framework-2.6.0.jar:na] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_60] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_60] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_60] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_60] 2015-11-25T06:53:39+0100 1.2.1.RELEASE ERROR CuratorFramework-0 curator.ConnectionState - Connection timed out for connection string (172.20.1.1:2181,172.20.1.8:2181,172.20.1.9:2181) and timeout (30000) / elapsed (36191) org.apache.curator.CuratorConnectionLossException: KeeperErrorCode = ConnectionLoss at org.apache.curator.ConnectionState.checkTimeouts(ConnectionState.java:198) [curator-client-2.6.0.jar:na] at org.apache.curator.ConnectionState.getZooKeeper(ConnectionState.java:88) [curator-client-2.6.0.jar:na] at org.apache.curator.CuratorZookeeperClient.getZooKeeper(CuratorZookeeperClient.java:115) [curator-client-2.6.0.jar:na] at org.apache.curator.framework.imps.CuratorFrameworkImpl.performBackgroundOperation(CuratorFrameworkImpl.java:793) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.CuratorFrameworkImpl.backgroundOperationsLoop(CuratorFrameworkImpl.java:779) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.CuratorFrameworkImpl.access$400(CuratorFrameworkImpl.java:58) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.CuratorFrameworkImpl$4.call(CuratorFrameworkImpl.java:265) [curator-framework-2.6.0.jar:na] [...] 2015-11-25T06:54:34+0100 1.2.1.RELEASE INFO ConnectionStateManager-0 container.ContainerRegistrar - Waiting for supervisor to clean up prior deployments (elapsed time 26 seconds)... 2015-11-25T06:55:05+0100 1.2.1.RELEASE INFO ConnectionStateManager-0 container.ContainerRegistrar - Waiting for supervisor to clean up prior deployments (elapsed time 57 seconds)... 2015-11-25T06:56:05+0100 1.2.1.RELEASE INFO ConnectionStateManager-0 container.ContainerRegistrar - Waiting for supervisor to clean up prior deployments (elapsed time 117 seconds)... 2015-11-25T06:57:05+0100 1.2.1.RELEASE INFO ConnectionStateManager-0 container.ContainerRegistrar - Waiting for supervisor to clean up prior deployments (elapsed time 177 seconds)... {noformat} *admin.log* {noformat} 2015-11-25T06:54:23+0100 1.2.1.RELEASE ERROR DeploymentSupervisor-0 cache.PathChildrenCache - org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /xd/deployments/modules/allocated/b1de9530-1837-42c0-a6bc-840b1b15aefc/JOB_TRIGGER.source.trigger.1 at org.apache.zookeeper.KeeperException.create(KeeperException.java:111) ~[zookeeper-3.4.6.jar:3.4.6-1569965] at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) ~[zookeeper-3.4.6.jar:3.4.6-1569965] at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1155) ~[zookeeper-3.4.6.jar:3.4.6-1569965] at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:302) ~[curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:291) ~[curator-framework-2.6.0.jar:na] at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:107) ~[curator-client-2.6.0.jar:na] at org.apache.curator.framework.imps.GetDataBuilderImpl.pathInForeground(GetDataBuilderImpl.java:287) ~[curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:279) ~[curator-framework-2.6.0.jar:na] at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:41) ~[curator-framework-2.6.0.jar:na] at org.springframework.xd.dirt.server.admin.deployment.zk.DepartingContainerModuleRedeployer.deployModules(DepartingContainerModuleRedeployer.java:116) ~[spring-xd-dirt-1.2.1.RELEASE.jar:1.2.1.RELEASE] at org.springframework.xd.dirt.server.admin.deployment.zk.ContainerListener.childEvent(ContainerListener.java:140) ~[spring-xd-dirt-1.2.1.RELEASE.jar:1.2.1.RELEASE] at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:509) [curator-recipes-2.6.0.jar:na] at org.apache.curator.framework.recipes.cache.PathChildrenCache$5.apply(PathChildrenCache.java:503) [curator-recipes-2.6.0.jar:na] at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:92) [curator-framework-2.6.0.jar:na] at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:297) [guava-16.0.1.jar:na] at org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:83) [curator-framework-2.6.0.jar:na] at org.apache.curator.framework.recipes.cache.PathChildrenCache.callListeners(PathChildrenCache.java:500) [curator-recipes-2.6.0.jar:na] at org.apache.curator.framework.recipes.cache.EventOperation.invoke(EventOperation.java:35) [curator-recipes-2.6.0.jar:na] at org.apache.curator.framework.recipes.cache.PathChildrenCache$10.run(PathChildrenCache.java:762) [curator-recipes-2.6.0.jar:na] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_60] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_60] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_60] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_60] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_60] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_60] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_60] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_60] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_60] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_60] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_60] {noformat} If a module is deployed on the node which has lost the connection, it's not redeployed on one of the two others. The only difference between node, is that the node in error has less memory. When this occurs, node doesn't appear anymore on the admin ui. And deployed streams do not appear as incomplete, but they should if a node has disappear and deployment property _module.*.count_ is set to the number of nodes. Thanks. Mickaël
    via by GERVAIS Mickaël,
    • org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /DRUID_PATH/indexer/leaderLatchPath/_c_3c32cd34-4370-4e26-922d-a9b24afa4a91-lock-0000102217 at com.google.common.base.Throwables.propagate(Throwables.java:160) at io.druid.indexing.overlord.TaskMaster.getLeader(TaskMaster.java:251) at io.druid.indexing.overlord.http.OverlordRedirectInfo.getRedirectURL(OverlordRedirectInfo.java:52) at io.druid.server.http.RedirectFilter.doFilter(RedirectFilter.java:73) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:83) at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:364) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1125) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1059) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at org.eclipse.jetty.server.Server.handle(Server.java:497) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:248) at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:620) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:540) at java.lang.Thread.run(Thread.java:745) Caused by: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /DRUID_PATH/indexer/leaderLatchPath/_c_3c32cd34-4370-4e26-922d-a9b24afa4a91-lock-0000102217 at org.apache.zookeeper.KeeperException.create(KeeperException.java:111) at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1212) at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:304) at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:293) at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:108) at org.apache.curator.framework.imps.GetDataBuilderImpl.pathInForeground(GetDataBuilderImpl.java:290) at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:281) at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:42) at org.apache.curator.framework.recipes.leader.LeaderSelector.participantForPath(LeaderSelector.java:375) at org.apache.curator.framework.recipes.leader.LeaderSelector.getLeader(LeaderSelector.java:346) at org.apache.curator.framework.recipes.leader.LeaderSelector.getLeader(LeaderSelector.java:339) at io.druid.indexing.overlord.TaskMaster.getLeader(TaskMaster.java:243) ... 22 more

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