rpm -ivh or -uvh kills already running glusterfsd process. This is unwise when we ask people to do upgrade on production systems. As they can upgrade and do shutdown at a later point in time.
PATCH: http://patches.gluster.com/patch/2010 in master (Don't stop an already running glusterfsd upon upgrade or install.)
PATCH: http://patches.gluster.com/patch/2011 in release-2.0 (Don't stop an already running glusterfsd upon upgrade or install.)