Corrected the workaround for gluster 3.5.2 operating version because I get this error message with gluster 3.5.2 and operating-version 30502 :
# [2014-12-01 13:31:35.524583] E [glusterd-store.c:1415:glusterd_restore_op_version] 0-management: wrong op-version (30502) retrieved
# [2014-12-01 13:31:35.524655] E [glusterd-store.c:2655:glusterd_restore] 0-management: Failed to restore op_version