RJR without m2eclipse does lead to a Debug Configuration dialog hang

[GoogleCodeExporter]

What is the expected output? What do you see instead?

Expected: Debug Configuration dialog opens normally.
Instead: when opening a RJR configuration in the Debug Configuration dialog, my 
CPU goes 100% for at least 30 minutes.

What steps will reproduce the problem?
1. checkout my code
2. mvn eclipse:eclipse
3. open Debug Configuration dialog
4. create a RJR configuration
5. close the Debug Configuration dialog
6. re-open it... and then it hangs

What Eclipse version are you using ?

Happened with Juno SR2 & Keppler ( 20130614-0229)

What Run-Jetty-Run version are you using?

Last one from the update site: 1.3.3.201203161919 (but also tried a nightly)

What OS are you using ? 32bit or 64 bit?

MacOS 64 bit. Java  1.7.0_25-b15

Please provide any additional information below.

Same versions of Eclipse & RJR, the project managed by m2eclipse is ok. But I 
am trying to get out of m2eclipse :)

Original issue reported on code.google.com by [email protected] on 17 Sep 2013 at 6:23