Invoking methods on JMX with user defined objects.

Hello, All.
Here is the problem description: We need to expose methods on JMX which takes some object of user defined class. We are not able to do that. Meaning, it is not getting enabled and if we invoke through code it says exception with serialization things. So we tried to make user defined class to implement serialization by making it to implement Serializable [though just adding serialization id]. But still we are getting the same problem. So I think we are missing some small step; as we are completely new this we are looking for some help in how to provide methods on jmx which accepts arguments of user defined type.
Thanks,
Prasanna.

When executing an operation via JMX using JConsole, I get the following error:
Problem invoking getManifest : java.rmi.UnmarshallException: Error unmarshalling return: nested is: java.lang.ClassNotFoundException: foo.bar.InernalServiceException (no security manager: RMI class loader disabled)
Code snippet:
public ArrayList getManifest(String s) throws InternalServiceException, MBeanException{
String path = ".\\foo_services.jar"; // Invalid path on purpose to test exception...
File file = new File(path);
FileInputStream fileInput;
try {
fileInput = new FileInputStream(file);
} catch (FileNotFoundException e) {
String msg = "The manifest file is not found in the given path";
if (logger.isErrorEnabled()) logger.error(msg);
throw new InternalServiceException(msg, ErrorConstants.JMX_FILE_NOT_FOUND);
If I throw new RuntimeException(msg, e) instead of InternalServiceException(msg, ErrorConstants.JMX_FILE_NOT_FOUND), it works and I get the appropriate exception.
What is the reason for this?

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