"uevent recv error -1 errno 105" logged from dlm_controld or gfs_controld and one or more cluster operations blocks in a RHEL 6 High Availability cluster

Issue

• Why does system report message "gfs_controld[xxx]: uevent recv error -1 errno 105" even we don't use gfs/gfs2?

hostname gfs_controld[xxx]: Dec 11 11:27:26 hostname gfs_controld[xxx]: uevent recv error -1 errno 105 

• When I'm attempting to stop rgmanager, it gets through stopping all of the services but then never exits, and /var/log/cluster/dlm_controld.log shows a "uevent recv error":

Apr 09 12:14:12 dlm_controld uevent recv error -1 errno 105