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com.jcraft.jsch.JSchException: java.net.NoRouteToHostException: No route to host at com.jcraft.jsch.Util.createSocket(Util.java:386) at com.jcraft.jsch.Session.connect(Session.java:182) at org.apache.hadoop.ha.SshFenceByTcpPort.tryFence(SshFenceByTcpPort.java:100) at org.apache.hadoop.ha.NodeFencer.fence(NodeFencer.java:97) at org.apache.hadoop.ha.ZKFailoverController.doFence(ZKFailoverController.java:532) at org.apache.hadoop.ha.ZKFailoverController.fenceOldActive(ZKFailoverController.java:505) at org.apache.hadoop.ha.ZKFailoverController.access$1100(ZKFailoverController.java:61) at org.apache.hadoop.ha.ZKFailoverController$ElectorCallbacks.fenceOldActive(ZKFailoverController.java:892) at org.apache.hadoop.ha.ActiveStandbyElector.fenceOldActive(ActiveStandbyElector.java:910) at org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:809) at org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:418) at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:599) at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)