Your package ecj failed to build from source in current rawhide. http://koji.fedoraproject.org/koji/taskinfo?taskID=6956358 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
Created attachment 904145 [details] build.log
Created attachment 904146 [details] root.log
Created attachment 904147 [details] state.log
I was already looking into this one.
Fixed in rawhide.