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RMI Server Exception

Answer 1

A:

java.lang.ClassNotFoundException: example.Hello.RemoteHello2

So it looks like you're missing that class from the classpath on the server?

John Gardner 2010-09-02 17:29:15

I don't think so.Because I have another class Server1, which actually connects to the registry in the same box and it works well.Both are using the same remote interface.

2010-09-02 17:34:23

but from what i can see, you're running server2 (its at the bottom of the stack trace), doing something over the wire, and the other side can't find your server class. You can't debug on the server side?

John Gardner 2010-09-02 23:30:03

Answer 2

A:

Here are troubleshooting tips from RMI guide : Try it!! This should help

6.1 If you encounter a problem running your RMI server

The first problem you might encounter is the receipt of a ClassNotFoundException when attempting to bind or rebind a remote object to a name in the registry. This exception is usually due to a malformed codebase property, resulting in the registry not being able to locate the remote object's stubs or other classes needed by the stub.

It is important to note that the remote object's stub implements all the same interfaces as the remote object itself, so those interfaces, as well as any other custom classes declared as method parameters or return values, must also be available for download from the specified codebase.

Most frequently, this exception is thrown as a result of omitting the trailing slash from the URL value of the property. Other reasons would include: the value of the property is not a URL; the path to the classes specified in the URL is incorrect or misspelled; the stub class or any other necessary classes are not all available from the specified URL.

Also check similar question http://stackoverflow.com/questions/464687/running-rmi-server-classnotfound

YoK 2010-09-02 17:39:57

I am not running my client code. I am getting this error when i try to start my server.As I explained, my server uses a remote registry (not the local one) to bind the name.

2010-09-02 17:52:38

have you started rmiregistry ?

YoK 2010-09-02 18:12:37

Answer 3

A:

If an instance local to the registry works, but not one that is remote, then I would guess is that your java.server.codebase either uses a file: URL, which would not be accessible to a remote registry, or the the remote registry lacks access to the http: or ftp: codebase.

mwhidden 2010-09-02 17:52:29

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