does it fail also on AS7.0?
I haven't noticed such freezes while running both 7.1 or 7.0 on linux and osx so wondering if there is some windows specific things.
We don't really do anything magical/weird/different in this area so a bit surprised seeing it happen.
And yes, getting a stacktrace via jstack would be great.
If the short info above is not enough take a look at https://community.jboss.org/wiki/TipsForReportingErrorsAgainstAnEclipsePlugin which outlines it in a bit more detail. Thanks.