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POJava RMI Tutorial - AccessControlException: access denied (java.io.FilePermission
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  1. POJava RMI Tutorial - AccessControlException: access denied (java.io.FilePermission
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    copied!<p>Yesterday I tried to get started with Java RMI. I found this sun tutorial (<a href="http://java.sun.com/docs/books/tutorial/rmi/index.html" rel="noreferrer">http://java.sun.com/docs/books/tutorial/rmi/index.html</a>) and started with the server implemantation. But everytime I start the pogram (the rmiregistry is running) I get an AccessControlException with the following StackTrace:</p> <pre><code>LoginImpl exception: java.security.AccessControlException: access denied (java.io.FilePermission \\\C\ProjX\server\serverProj\bin\usermanager read) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264) at java.security.AccessController.checkPermission(AccessController.java:427) at java.lang.SecurityManager.checkPermission(SecurityManager.java:532) at java.lang.SecurityManager.checkRead(SecurityManager.java:871) at java.io.File.exists(File.java:700) at sun.net.www.protocol.file.Handler.openConnection(Handler.java:80) at sun.net.www.protocol.file.Handler.openConnection(Handler.java:55) at java.net.URL.openConnection(URL.java:943) at sun.rmi.server.LoaderHandler.addPermissionsForURLs(LoaderHandler.java:1020) at sun.rmi.server.LoaderHandler.access$300(LoaderHandler.java:52) at sun.rmi.server.LoaderHandler$Loader.&lt;init&gt;(LoaderHandler.java:1108) at sun.rmi.server.LoaderHandler$Loader.&lt;init&gt;(LoaderHandler.java:1089) at sun.rmi.server.LoaderHandler$1.run(LoaderHandler.java:861) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.server.LoaderHandler.lookupLoader(LoaderHandler.java:858) at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:541) at java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:628) at java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:294) at sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:238) at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1494) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1457) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339) at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source) at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:375) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:240) at sun.rmi.transport.Transport$1.run(Transport.java:153) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:149) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701) at java.lang.Thread.run(Thread.java:595) at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source) at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source) at sun.rmi.server.UnicastRef.invoke(Unknown Source) at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source) at startserver.StartServer.main(StartServer.java:22) </code></pre> <p>My server.policy file looks like this:</p> <pre><code>grant { permission java.security.AllPermission; }; </code></pre> <p>But I´ve also tried this one ...</p> <pre><code>grant { permission java.security.AllPermission; permission java.io.FilePermission "file://C:/ProjX/server/serverProj/bin/usermanager", "read"; }; </code></pre> <p>... and this one (and several others :-():</p> <pre><code>grant codeBase "file:///-" { permission java.security.AllPermission; }; </code></pre> <p>But in every case the result is the same. And yes, the policy file is in path (I see a Parse Exception, when I write wrong statments into the policy-file). I tried out several other "/" and "\" constellations but it has no effect.</p> <p>I use Eclipse and my VM-Parameters are like this:</p> <pre><code>-cp C:\ProjX\server\serverProj\bin\usermanager\ -Djava.rmi.server.codebase=file://C:/ProjX/server/serverProj/bin/usermanager/ -Djava.rmi.server.hostname=XYZ (anonymized) -Djava.security.policy=server.policy </code></pre> <p>The compiled Remote-Interface and the interface-implementation class (LoginImpl) classes are in this path: "C:/ProjX/server/serverProj/bin/usermanager/". The main method, where I instanciate and rebind the stub to the registry is in another package and looks like this:</p> <pre><code>public static void main(String[] args) { if (System.getSecurityManager() == null) { System.setSecurityManager(new SecurityManager()); } try { String name = "Login"; Login login = new LoginImpl(); Login stub = (Login) UnicastRemoteObject.exportObject(login, 0); Registry registry = LocateRegistry.getRegistry(); registry.rebind(name, stub); System.out.println("LoginImpl bound"); } catch (Exception e) { System.err.println("LoginImpl exception:"); e.printStackTrace(); } } </code></pre> <p>Does anybody have an advice for me? Thank you for help.</p> <hr> <p>So the question is the same (the java.rmi.UnmarshalException shows that changing the codebase is not the solution of my AccessControlException). And no: I don´t want to buy a plugin "G B" ;-).</p>
 

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