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https://issues.apache.org/jira/browse/HADOOP-10722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14037201#comment-14037201
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Beckham007 commented on HADOOP-10722:
-------------------------------------
"Unable to connect to host-10-18-40-101 as user myuser port 22"
Check ur config whether "ssh myuser@host-10-18-40-101" works on ur standby
node.
I think this is not a bug, but wrong configuration.
> Standby NN continuing as standby when active NN machine got shutdown.
> ---------------------------------------------------------------------
>
> Key: HADOOP-10722
> URL: https://issues.apache.org/jira/browse/HADOOP-10722
> Project: Hadoop Common
> Issue Type: Bug
> Components: auto-failover, ha
> Affects Versions: 2.4.0
> Reporter: surendra singh lilhore
>
> I have HA cluster with 3 ZK, 3 QJM.
> My Active NN machine got shutdown, but still my standby NN is standby only.
> It should be active
> ZKFC logs
> ========
> {noformat}
> 2014-06-19 13:39:30,810 INFO org.apache.hadoop.ha.NodeFencer: ======
> Beginning Service Fencing Process... ======
> 2014-06-19 13:39:30,810 INFO org.apache.hadoop.ha.NodeFencer: Trying method
> 1/1: org.apache.hadoop.ha.SshFenceByTcpPort(null)
> 2014-06-19 13:39:30,811 INFO org.apache.hadoop.ha.SshFenceByTcpPort:
> Connecting to host-10-18-40-101...
> 2014-06-19 13:39:30,811 INFO org.apache.hadoop.ha.SshFenceByTcpPort.jsch:
> Connecting to host-10-18-40-101 port 22
> 2014-06-19 13:39:33,814 WARN org.apache.hadoop.ha.SshFenceByTcpPort: Unable
> to connect to host-10-18-40-101 as user myuser
> 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:521)
> at
> org.apache.hadoop.ha.ZKFailoverController.fenceOldActive(ZKFailoverController.java:494)
> at
> org.apache.hadoop.ha.ZKFailoverController.access$1100(ZKFailoverController.java:59)
> at
> org.apache.hadoop.ha.ZKFailoverController$ElectorCallbacks.fenceOldActive(ZKFailoverController.java:837)
> at
> org.apache.hadoop.ha.ActiveStandbyElector.fenceOldActive(ActiveStandbyElector.java:901)
> at
> org.apache.hadoop.ha.ActiveStandbyElector.becomeActive(ActiveStandbyElector.java:800)
> at
> org.apache.hadoop.ha.ActiveStandbyElector.processResult(ActiveStandbyElector.java:415)
> at
> org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:596)
> at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)
> 2014-06-19 13:39:33,814 WARN org.apache.hadoop.ha.NodeFencer: Fencing method
> org.apache.hadoop.ha.SshFenceByTcpPort(null) was unsuccessful.
> {noformat}
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