Can not mount RHGS volume subdirectories via the native Gluster FUSE client

Issue

When attempting to mount a volume subdirectory via the native client, the operation fails and the following error is recorded in the volume's log:

E [glusterfsd-mgmt.c:1549:mgmt_getspec_cbk] 0-glusterfs: failed to get the 'volume file' from server
E [glusterfsd-mgmt.c:1649:mgmt_getspec_cbk] 0-mgmt: failed to fetch volume file (key:/<volume>/<path>)
W [glusterfsd.c:1062:cleanup_and_exit] (-->/usr/lib64/libgfrpc.so.0(rpc_clnt_notify+0x147) [0x381e80df37] (-->/usr/lib64/libgfrpc.so.0(rpc_clnt_handle_reply+0xa5) [0x381e80cf35] (-->/usr/sbin/glusterfs(mgmt_getspec_cbk+0x3b8) [0x40bcf8]))) 0-: received signum (0), shutting down