HADOOP 启动NodeManager闪退,logs信息：java.net.NoRouteToHostException: 没有到主机的路由

提示LOGS信息

org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.net.NoRouteToHostException: No Route to Host from  dataNode1/192.168.2.247 to nameNode:8031 failed on socket timeout exception: java.net.NoRouteToHostException: 没有到主机的路由; For more details see:  http://wiki.apache.org/hadoop/NoRouteToHost
        at org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.serviceStart(NodeStatusUpdaterImpl.java:197)
        at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
        at org.apache.hadoop.service.CompositeService.serviceStart(CompositeService.java:120)
        at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceStart(NodeManager.java:245)
        at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
        at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:426)
        at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:472)
Caused by: java.net.NoRouteToHostException: No Route to Host from  dataNode1/192.168.2.247 to nameNode:8031 failed on socket timeout exception: java.net.NoRouteToHostException: 没有到主机的路由; For more details see:  http://wiki.apache.org/hadoop/NoRouteToHost
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
        at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:783)
        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:756)
        at org.apache.hadoop.ipc.Client.call(Client.java:1415)
        at org.apache.hadoop.ipc.Client.call(Client.java:1364)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206)
        at com.sun.proxy.$Proxy28.registerNodeManager(Unknown Source)
        at org.apache.hadoop.yarn.server.api.impl.pb.client.ResourceTrackerPBClientImpl.registerNodeManager(ResourceTrackerPBClientImpl.java:68)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
        at com.sun.proxy.$Proxy29.registerNodeManager(Unknown Source)
        at org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.registerWithRM(NodeStatusUpdaterImpl.java:257)
        at org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.serviceStart(NodeStatusUpdaterImpl.java:191)
        ... 6 more
Caused by: java.net.NoRouteToHostException: 没有到主机的路由
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
        at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:529)
        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:493)
        at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:606)
        at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:700)
        at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:367)
        at org.apache.hadoop.ipc.Client.getConnection(Client.java:1463)
        at org.apache.hadoop.ipc.Client.call(Client.java:1382)
        ... 19 more

解决方法：

1.查看 hosts 是否配置正确

2.查看防火墙是否关闭