I've not heard of that error being reported, and the JIRA database does not seem to have any hints of something that general failing in 1.447.2.
You could review https://issues.jenkins-ci.org/browse/JENKINS-14143 (which is not a bug) to see if some of its hints might help you. Mark Waite >________________________________ > From: Brian Preuß <brian.pre...@gmail.com> >To: jenkinsci-users@googlegroups.com >Sent: Friday, July 20, 2012 3:35 AM >Subject: Jenkins 1.447.2 LTS UnsupportedClassVersionError > > >Hi all, > >I'm getting a UnsupportedClassVersionError for a JDK 1.50_17 build on Jenkins >1.44.72 LTS running in Tomcat 7.0.29 and JDK 1.6.0_33. The concerned class >that fail to load is javax.servlet.ServletException. > >Is anyone experiencing the same problem? > >-- >Regards, > >Brian Preuß > > >