"Error in PRETRANS scriptlet in rpm package" errors received during RHS 2.1 update process via yum

Issue

During the update process from RHS 2.1 update 1 to RHS 2.1 update 2, the yum update command complains:

Error in PRETRANS scriptlet in rpm package glusterfs-libs-3.4.0.59rhs-1.el6rhs.x86_64
Error in PRETRANS scriptlet in rpm package glusterfs-api-3.4.0.59rhs-1.el6rhs.x86_64
WARNING: Updating glusterfs requires its processes to be killed. This action does NOT incur downtime.
WARNING: Ensure to wait for the upgraded server to finish healing before proceeding.
WARNING: Refer upgrade section of install guide for more details
Please run # service glusterd stop; pkill glusterfs; pkill glusterfsd; pkill gsyncd.py;
Error in PRETRANS scriptlet in rpm package glusterfs-3.4.0.59rhs-1.el6rhs.x86_64
Error in PRETRANS scriptlet in rpm package glusterfs-fuse-3.4.0.59rhs-1.el6rhs.x86_64
Error in PRETRANS scriptlet in rpm package glusterfs-geo-replication-3.4.0.59rhs-1.el6rhs.x86_64
Error in PRETRANS scriptlet in rpm package glusterfs-server-3.4.0.59rhs-1.el6rhs.x86_64
Error in PRETRANS scriptlet in rpm package glusterfs-rdma-3.4.0.59rhs-1.el6rhs.x86_64