My 1.6 Xwiki install has started eating all my CPU when I try to go to any "rendered page" like Blogs or What's New. Regular static pages work fine. Eventually, tomcat times out the connection to the rendered page. I upgraded to 1.7 but the behavior is still the same.
Attached is the Xwiki.log, which doesn't seem to have much other than an NPE which I doubt is the cause. Also included is a thread dump in the catalina.out.
This is an internal system so that there are no crawlers or the like in the environment. I never happens unless trying to run something dynamic like Blog.Macros.