Java RMI 无法绑定(bind)服务器

Question

我正在处理 Java RMI 应用程序，并且在将服务器绑定(bind)到注册表时遇到问题。我正在使用 rmi 插件在 eclipse 上工作，在我不得不格式化我的电脑之前一切都运行良好。另外，我确定代码没问题，因为它是作为解决方案提供给我的代码，所以我的配置一定有问题。这是代码:

public static void main (String[] args){

    try{

         RMIChatServer myObject = new RMIChatServerImpl();

        System.setSecurityManager(new RMISecurityManager());

        Naming.rebind("Hello", myObject);

        System.out.println("Remote object bound to registry");
    }
    catch( Exception e){

        System.out.println("Failed to register object " + e);
        e.printStackTrace();
        System.exit(1);

    }

}

它给出的异常:

Failed to register object java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
    java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
    java.lang.ClassNotFoundException: access to class loader denied
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
    java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
    java.lang.ClassNotFoundException: access to class loader denied
    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:419)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:267)
    at sun.rmi.transport.Transport$1.run(Transport.java:177)
    at sun.rmi.transport.Transport$1.run(Transport.java:174)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:553)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:808)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:667)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
    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 java.rmi.Naming.rebind(Naming.java:177)
    at RMIChatServerImpl.main(RMIChatServerImpl.java:175)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
    java.lang.ClassNotFoundException: access to class loader denied
    at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:409)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:267)
    at sun.rmi.transport.Transport$1.run(Transport.java:177)
    at sun.rmi.transport.Transport$1.run(Transport.java:174)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:553)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:808)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:667)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.ClassNotFoundException: access to class loader denied
    at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:447)
    at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:184)
    at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:637)
    at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:264)
    at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java:216)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1593)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1514)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1750)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1347)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
    ... 13 more
Caused by: java.security.AccessControlException: access denied ("java.io.FilePermission" "\D:\uni\YEAR 3\Enterprise Programming\java\czat solution 2\bin\-" "read")
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:366)
    at java.security.AccessController.checkPermission(AccessController.java:555)
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
    at sun.rmi.server.LoaderHandler$Loader.checkPermissions(LoaderHandler.java:1176)
    at sun.rmi.server.LoaderHandler$Loader.access$000(LoaderHandler.java:1130)
    at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:411)
    ... 22 more

我研究了这个问题，大多数人说这是因为代码库设置(我也使用安全策略)，我尝试了不同的设置，目前使用 rmi 插件提供的“从类路径计算”选项，它以前有效，但失败了现在:(请指教!

Answer 1

前世今生

我从JDK1.6.0_33升级到1.7.0_21也遇到了同样的问题。我找到了这个 document并通过启动 rmiregistry 解决了这个问题:

rmiregistry -J-Djava.rmi.server.useCodebaseOnly=false