hadoop-2.7.3的nodemanager自动关闭问题

hadoop集群在启动yarn时会启动resourcemanager和nodemanger ，如果nodemanager 过段时间会自动关闭，而且在hadoop的 yarn-username-nodemanger-hostname.log日子文件中会出现：

2016-11-09 22:43:02,649 INFO org.apache.hadoop.yarn.client.RMProxy: Connecting to ResourceManager at  /0.0.0.0:8031

..........

2016-11-09 22:44:35,424 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8031. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-09 22:44:36,427 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8031. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-09 22:44:37,432 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8031. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-09 22:44:38,434 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8031. Already tried 3 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-09 22:44:39,436 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8031. Already tried 4 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-09 22:44:40,438 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8031. Already tried 5 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-09 22:44:41,441 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8031. Already tried 6 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-09 22:44:42,443 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8031. Already tried 7 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-09 22:44:43,446 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8031. Already tried 8 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-09 22:44:44,448 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8031. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)

过段时间之后各个datanode机器上的nodemanger会自动关闭，并且报一下的错误：

2016-11-09 22:44:44,459 ERROR org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl: Unexpected error starting NodeStatusUpdater
java.net.ConnectException: Call From Aspire2/192.168.0.16 to 0.0.0.0:8031 failed on connection exception: java.net.ConnectException: Connection refused; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused
        at sun.reflect.GeneratedConstructorAccessor20.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:792)
        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:732)
        at org.apache.hadoop.ipc.Client.call(Client.java:1479)
        at org.apache.hadoop.ipc.Client.call(Client.java:1412)
        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
        at com.sun.proxy.$Proxy72.registerNodeManager(Unknown Source)
        at org.apache.hadoop.yarn.server.api.impl.pb.client.ResourceTrackerPBClientImpl.registerNodeManager(ResourceTrackerPBClientImpl.java:68)
        at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:191)
        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
        at com.sun.proxy.$Proxy73.registerNodeManager(Unknown Source)
        at org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.registerWithRM(NodeStatusUpdaterImpl.java:270)
        at org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.serviceStart(NodeStatusUpdaterImpl.java:197)
        at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
        at org.apache.hadoop.service.CompositeService.serviceStart(CompositeService.java:120)
        at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceStart(NodeManager.java:272)
        at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
        at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:496)
        at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:543)
Caused by: java.net.ConnectException: Connection refused
        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
        at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:531)
        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:495)
        at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:614)
        at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:712)
        at org.apache.hadoop.ipc.Client$Connection.access$2900(Client.java:375)
        at org.apache.hadoop.ipc.Client.getConnection(Client.java:1528)
        at org.apache.hadoop.ipc.Client.call(Client.java:1451)
        ... 18 more

问题应该就是出现在上面0.0.0.0:8031这里，nodemanager应该隔一段时间要向resourcemanger报告情况，但是这里地址链接不是resourcemanager的地址，所以连接不上，一直报告不了情况，之后就关闭nodemanger然后抛出java.net.ConnectException: Connection refused异常。

那么处理这个问题的方法只要在yarn-site.xml中配置：

<property>

<name>yarn.resourcemanger.resource-tracker.address</name>

<value>ResourceMangerHostname:8031</value>

</property>

ResourceMangerHostname,改成resoucemanger所在机器的主机名，问题应该可以解决！