For awhile lustre rpms don't build out of the box for ARM or Power8 platforms due to the lustre.spec file being incorrect with lsvcgss handling. This file is a server only file but it currently is installed on clients as well. One some platforms lsvcgss will not be there so it fails to build rpms. Since it was only on ARM or Power8 no big rush was done to resolve this but today I saw it happen on a normal x86 RHEL7  system. So this needs to be pushed so users don't run into RHEL rpm build issues.