https://community.cloudera.com/t5/Support-Questions/ZooKeeper-Failover-controller-crashes-when-the-Hadoop/m-p/213262#M175190 <P>We see the following FATAL error messages in the ZooKeeper Failover controller Logs. </P><P>17/08/07 16:13:38 <STRONG>FATAL </STRONG>ha.ActiveStandbyElector: Received create error from Zookeeper. code:NONODE for path /hadoop-ha/ha-cluster/ActiveStandbyElectorLock 17/08/07 16:13:38 DEBUG ha.ActiveStandbyElector: Terminating ZK connection for elector id=1435256152 appData=0a0a68612d636c757374657212036e6e311a177230306a39726e30632e626e796d656c6c6f6e2e6e657420a84628d33e cb=Elector callbacks for NameNode at r00j9rn0c.bnymellon.net/10.61.6.20:9000 17/08/07 16:13:38 DEBUG zookeeper.ZooKeeper: Closing session: 0x15dbd57822b000f 17/08/07 16:13:38 DEBUG zookeeper.ClientCnxn: Closing client for session: 0x15dbd57822b000f 17/08/07 16:13:38 DEBUG zookeeper.ClientCnxn: Reading reply sessionid:0x15dbd57822b000f, packet:: clientPath:null serverPath:null finished:false header:: 6,-11 replyHeader:: 6,73,0 request:: null response:: null 17/08/07 16:13:38 DEBUG zookeeper.ClientCnxn: Disconnecting client for session: 0x15dbd57822b000f 17/08/07 16:13:38 INFO zookeeper.ZooKeeper: Session: 0x15dbd57822b000f closed 17/08/07 16:13:38 <STRONG>FATAL </STRONG>ha.ZKFailoverController: Fatal error occurred:Received create error from Zookeeper. code:NONODE for path /hadoop-ha/ha-cluster/ActiveStandbyElectorLock 17/08/07 16:13:38 INFO zookeeper.ClientCnxn: EventThread shut down 17/08/07 16:13:38 INFO ipc.Server: Stopping server on 8019 17/08/07 16:13:38 DEBUG ipc.Server: IPC Server handler 0 on 8019: exiting 17/08/07 16:13:38 DEBUG ipc.Server: IPC Server handler 2 on 8019: exiting 17/08/07 16:13:38 DEBUG ipc.Server: IPC Server handler 1 on 8019: exiting 17/08/07 16:13:38 INFO ha.ActiveStandbyElector: Yielding from election 17/08/07 16:13:38 INFO ipc.Server: Stopping IPC Server listener on 8019 17/08/07 16:13:38 INFO ipc.Server: Stopping IPC Server Responder 17/08/07 16:13:38 INFO ha.HealthMonitor: Stopping HealthMonitor thread 17/08/07 16:13:38 <STRONG>FATAL </STRONG>tools.DFSZKFailoverController: Got a fatal error, exiting now java.lang.RuntimeException: ZK Failover Controller failed: Received create error from Zookeeper. code:NONODE for path /hadoop-ha/ha-cluster/ActiveStandbyElectorLock at org.apache.hadoop.ha.ZKFailoverController.mainLoop(ZKFailoverController.java:369) at org.apache.hadoop.ha.ZKFailoverController.doRun(ZKFailoverController.java:238) at org.apache.hadoop.ha.ZKFailoverController.access$000(ZKFailoverController.java:61) at org.apache.hadoop.ha.ZKFailoverController$1.run(ZKFailoverController.java:172) at org.apache.hadoop.ha.ZKFailoverController$1.run(ZKFailoverController.java:168) at org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:415)</P> Tue, 08 Aug 2017 03:22:53 GMT albert_stark 2017-08-08T03:22:53Z