解决:Yarn不能启动，没有ResourceManager

用start-yarn.sh命令之后，刚开始有ResourceManager进程，一会儿该进程就被关闭了。

查看日志发现：

INFO org.apache.hadoop.service.AbstractService: Service org.apache.hadoop.yarn.server.resourcemanager.ResourceTrackerService failed in state STARTED; cause: org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.net.BindException: Problem binding to [slave1:8031] java.net.BindException: Cannot assign requested address; For more details see:  http://wiki.apache.org/hadoop/BindException
org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.net.BindException: Problem binding to [slave1:8031] java.net.BindException: Cannot assign requested address; For more details see:  http://wiki.apache.org/hadoop/BindException
    at org.apache.hadoop.yarn.factories.impl.pb.RpcServerFactoryPBImpl.getServer(RpcServerFactoryPBImpl.java:139)
    at org.apache.hadoop.yarn.ipc.HadoopYarnProtoRPC.getServer(HadoopYarnProtoRPC.java:65)
    at org.apache.hadoop.yarn.ipc.YarnRPC.getServer(YarnRPC.java:54)
    at org.apache.hadoop.yarn.server.resourcemanager.ResourceTrackerService.serviceStart(ResourceTrackerService.java:162)
    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.resourcemanager.ResourceManager$RMActiveServices.serviceStart(ResourceManager.java:592)
    at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
    at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.startActiveServices(ResourceManager.java:1007)
    at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$1.run(ResourceManager.java:1048)
    at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$1.run(ResourceManager.java:1044)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1656)
    at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.transitionToActive(ResourceManager.java:1044)
    at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.serviceStart(ResourceManager.java:1084)
    at org.apache.hadoop.service.AbstractService.start(AbstractService.java:193)
    at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager.main(ResourceManager.java:1219)
Caused by: java.net.BindException: Problem binding to [slave1:8031] java.net.BindException: Cannot assign requested address; For more details see:  http://wiki.apache.org/hadoop/BindException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791)
    at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:720)
    at org.apache.hadoop.ipc.Server.bind(Server.java:424)
    at org.apache.hadoop.ipc.Server$Listener.(Server.java:573)
    at org.apache.hadoop.ipc.Server.(Server.java:2206)
    at org.apache.hadoop.ipc.RPC$Server.(RPC.java:931)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Server.(ProtobufRpcEngine.java:537)
    at org.apache.hadoop.ipc.ProtobufRpcEngine.getServer(ProtobufRpcEngine.java:512)
    at org.apache.hadoop.ipc.RPC$Builder.build(RPC.java:776)
    at org.apache.hadoop.yarn.factories.impl.pb.RpcServerFactoryPBImpl.createServer(RpcServerFactoryPBImpl.java:169)
    at org.apache.hadoop.yarn.factories.impl.pb.RpcServerFactoryPBImpl.getServer(RpcServerFactoryPBImpl.java:132)
    ... 17 more
Caused by: java.net.BindException: Cannot assign requested address
    at sun.nio.ch.Net.bind0(Native Method)
    at sun.nio.ch.Net.bind(Net.java:433)
    at sun.nio.ch.Net.bind(Net.java:425)
    at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
    at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
    at org.apache.hadoop.ipc.Server.bind(Server.java:407)
    ... 25 more

解决方法：

       在ResourceManager所在节点上启动Yarn。