[lkb]

I can not for the life of me get Hotswap and debugging working with Resin3, MyEclipse and JDK 1.5.

My setup:
Windows XP (not by choice)
Eclipse 3.1.0
MyEclipse 4.0.2
JDK 1.5.0_05-b05

resin-pro-3.0.s051014 (required for hotswap on windows w/jdk 1.5)

So, under Resin3 in the MyEclipse Application Server I have:
Resin Home Directory: C:\resin-pro-3.0.s051014
Configuration File: C:\resin-pro-3.0.s051014\conf/resin.conf

Paths:
all jars from resin_home/lib except resin.jar and resin1.5.jar

library path:
resin_hom/bin

Now…..
What goes in optional JVM arguments?
I have tried
-Xnoagent -Xrunjdwp:transport=dt_socket,server=y,address=8000,suspend=n
and
-Xrunjdwp:transport=dt_socket,server=y,address=8000,suspend=n
and
-J-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=8000
and
-Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,server=y,address=8000,suspend=n
and
-Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=8000,suspend=n
and
-Xdebug -J-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=8000

in run mode with the -xdebug, resin will start but will complain about being out of sync if I make one small code change.

in debug mode I get a popup:

A configuration error occured during startup. Please verify the preference field with the prompt: ERROR: JDWP unable to get necessary JVMTI capabilities. [“debugInit.c”, L279]

So, clearly something is amiss. Has anyone gotten this to work properly?

[Scott Anderson]

I think we covered this one here:
https://www.genuitec.com/forums/topic/closed-problems-launching-resin-3-pro-myeclipseide-4-0-1/#post-239000

If the workaround solves the issue for you, you’ll be pleased to know that this was addressed in MyEclipse 4.0.3 (available now) so that adding pro.jar to the path is no longer required.

[lkb]

That thread doesn’t help me at all.

The pro.jar was already added by me.

I am getting some other error:

A configuration error occured during startup. Please verify the preference field with the prompt: ERROR: JDWP unable to get necessary JVMTI capabilities. [“debugInit.c”, L279]

[Scott Anderson]

It’s really unclear how you’re trying to start Resin. If you’re starting using our Resin 3 connector at Window > Preferences > MyEclipse > Application Servers > Resin 3 then you don’t need to set any debug arguments at all. All you have to do is point the configuration panel to the location of your Resin 3 install. MyEclipse handles setting up the debug connection automatically. Providing debug arguments would likely mess this up. Details on configuring application servers is in Using Application Servers quickstart in the Documentation Section.

If you’re trying to launch Resin manually, externally from MyEclipse and then connect to it, information on how to do that is in the Remote Debugging quickstart in the same documentation section shown above.

The first option, using the built-in connector is far simpler and highly recommended, but Resin must be running on the same machine as MyEclipse.

[lkb]

I am running it from within MyEclipse.

So, I have set it up without any args at all.

Choose my JDK 1.5.0_05, select Debug mode, and nothing in the paths.

I run it, and it starts.

I can step through code.

But, if I try to alter something like change

return foo;

to

retuirn false;

for debugging, I get this error:

Hot code replace failed
<not responding> was unable to replace the running code with the code in the workspace.

Reason:
Hot code replace failed = Scheme change not implemented

So, that’s why I was trying the various arguments, to enable jdwp.

So, is what I’m trying to do possible?

[Scott Anderson]

So, that’s why I was trying the various arguments, to enable jdwp.

The issue is likely that you’re not running Eclipse and Resin with the same JDK version and the two JDKs are having trouble communicating. To start Eclipse with a particular JDK use:
eclipse.exe -vm <path-to-jdk-install>\bin\javaw.exe

Then set the Resin connector to use the same JDK at Window > Preferences > MyEclipse > Application Servers > Resin 3 > JDK

[Author]

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