Your package kawa failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=6994518 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 905789 [details] build.log
Created attachment 905791 [details] root.log
Created attachment 905792 [details] state.log
Cause is bug 819551 (BR: servlet25 from tomcat6, retired).
*** Bug 819551 has been marked as a duplicate of this bug. ***
I'm just reviewing the code, in gnu/kawa/servlet/ChangeLog I can see from 1.14 servlet 3.0 support is added. So migrating to tomcat7 shouldn't be a big problem now. But I'm encountering this issue again and again: make[1]: *** [java-classes.stamp] Segmentation fault (core dumped)
*** Bug 992655 has been marked as a duplicate of this bug. ***