RMI服务器异常 [英] RMI Server Exception

问题描述

当我尝试运行使用远程注册表的服务器时，我从RMI获得以下异常。

I am getting below exception from RMI when I try to run a Server which uses a remote registry.

我在Server2类中的main方法的注册表代码是

My registry cod for the main method in Server2 class is

Registry registry = LocateRegistry.getRegistry("192.168.1.4",1100);
registry.rebind("Hello",stub);

192.168.1.4是同一局域网中的另一台机器。

192.168.1.4 is another machine in the same LAN.

请帮帮我。

Server2 exception:java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
 java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
 java.lang.ClassNotFoundException: example.Hello.RemoteHello2
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
 java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
 java.lang.ClassNotFoundException: example.Hello.RemoteHello2
 at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:396)
 at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
 at sun.rmi.transport.Transport$1.run(Transport.java:159)
 at java.security.AccessController.doPrivileged(Native Method)
 at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
 at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
 at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
 at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:619)
 at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:273)
 at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:251)
 at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:377)
 at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
 at example.Hello.Server2.main(Server2.java:29)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
 java.lang.ClassNotFoundException: example.Hello.RemoteHello2
 at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
 at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:386)
 at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
 at sun.rmi.transport.Transport$1.run(Transport.java:159)
 at java.security.AccessController.doPrivileged(Native Method)
 at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
 at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
 at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
 at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:619)

我有一个名为RemoteHello2的类，我可以确认这一点，因为同一个包中的另一个Server程序运行正常。

I have the class called RemoteHello2 and I can confirm this because another Server program in the same package is running fine.

我有2个服务器程序，1个使用localhost作为注册表，第2个使用远程服务器作为注册表。

I have 2 server programs, 1 uses localhost as the registry and 2nd one uses a remote server as registry.

推荐答案

我遇到了这个问题。事实证明，我已经像正常一样通过命令提示符启动了rmi注册表，但是我没有在与server.class相同的文件夹中启动它。当我将目录更改为server.class所在的位置时，它没有任何问题。

I had this problem. It turns out that I had started the rmi registry through command prompt like normal, however I didn't start it in the same folder as my server.class. When I changed the directory to where server.class was, it worked with no problems.

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