Java.io.FilePermission

Question

I am baffled by a security.AccessControlException that I get when I try to start an RMI server.
The server sets an RMISecurityManager(), then creates an engine that extends UnicastRemoteObject and attempts to bind it (on localhost) with Naming.rebind(...). There it fails:
RemoteCalcServer exception: access denied (java.io.FilePermission \\C\Projects\OmegaClient\classes read)
java.security.AccessControlException: access denied (java.io.FilePermission \\C\Projects\OmegaClient\classes read)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:245)
     at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:220)
     at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:354)
     at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
     at java.rmi.Naming.rebind(Naming.java:160)
at com.tibotec.isclient.calc.server.RemoteCalcServer.main(RemoteCalcServer.java:52)
The policy file is:
grant codeBase "file://C:/Projects/OmegaClient/classes/-" {
permission java.io.FilePermission "\\C\\Projects\\OmegaClient\\classes\\", "read";
permission java.net.SocketPermission "localhost:1024-", "listen, accept, connect";
It must be correctly loaded and used, because a (different) exception is generated when I comment out the SocketPermission. But why does RMI complain about not having reading permission on that directory (the codeBase, and its value must be correct, or else I should get ClassNotFound exceptions)?
I have tried every almost imaginable change to the directory syntax, including including "C:\\-", "file://C:/-", and "<<ALL FILES>>" but those don't help...
Emmanuel

Answer 1

did you find out what the problem was in the end??
Im in a similar predicament.
Decided i would have a look at some of the tutorials so i took the nice and easy hello world.
You can find it here
http://java.sun.com/j2se/1.5.0/docs/guide/rmi/hello/hello-world.html
Anyways when it comes down to running it i run into all sorts of problems. Im using the jdk1.5 Update 13.
I trying to run both the server locally on my machine. My first exception i run into is
(Package name differs slightly to the example but everything else is the same)
Server exception: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: hello.Hello
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: hello.Hello
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:385)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:240)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:466)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707)
at java.lang.Thread.run(Thread.java:595)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown
Ok all class files are there and sit in the same package and tells me it cant find the Hello class. So i then set the
Djava.rmi.server.codebase attribute to my classes directory. So then i move onto to my next exception
Server exception: java.security.AccessControlException: access denied (java.io.FilePermission \\c\eclipse\workspace\helloworld\bin read)
java.security.AccessControlException: access denied (java.io.FilePermission \\c\eclipse\workspace\helloworld\bin read)
So i then create a policy file and grant all access.(Which im thinking i shouldnt be doing this because everything is local)
So i then specify it on the command line Djava.security.policy= grant all policy
Still get the same problem, what i dont get is why i need this when i run everything local, my understanding is that if you run it locally you dont need to specify a security policy file and codebase.
if gives no indication in the tutorial either that you need this. Anyone any ideas how i can get this simple thing to work!!
Cheers,
LL