Remote Debugging of OJVM without using JDeveloper

I need to remotely debug a Java program running in an OJVM started with the following command line:
java.exe -ojvm -XXdebug,detached,port4000,quiet
Using Oracle's JDeveloper, which can connect and debug this program, is not an option. The program doing the "debugging" is a home-grown utility that will have very specialized functionality unique to the program its debugging. As of right now we would like to use the plain-vanilla Sun's Hotspot 1.4 JVM, if possible, for the "debugger's" jvm. So, if I can get Sun's jdb.exe to connect to the OJVM then I can get the home-grown "debugger" to work too.
I know if I change the startup parameters of the debugee java program to this:
java.exe -classic -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=4000 -Xdebug -Xnoagent -Djava.compiler=NONE
I can get jdb to connect with this:
jdb -connect com.sun.jdi.SocketAttach:hostname=myhostname,port=4000
Changing the startup parameters is something that I absolutely, positively want to avoid.
So what would be the jdb connect string?
Is it required that the OJVM be installed and used by the PC where jdb is running?
The debugger would be running under windows 2000 if that's important to know.
Thanks.

Hi.
jdb uses the Java Platform Debugger Architecture (JPDA). See http://java.sun.com/products/jpda for more information. I suspect that your home-grown debugger is built on JPDA.
Unfortunately, OJVM does not implement JVMDI (Java Virtual Machine Debugger Interface), which is the part of JPDA that a JVM must implement in order to support JPDA.
So, you are not going to be able to debug with jdb and OJVM together.
You can use hotspot for the debuggee's JVM by using the following arguments:
java.exe -client -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=4000
I know you said that you positively want to avoid changing the startup parameters, but if you want to use jdb (or any home-grown debugger built on JPDA), you can't use OJVM. Sorry.
-Liz Looney

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