I can't stopping the cluster service group

I want to offline the cluster service, but it stopping for long time 

B Documentum devuaedms31 Y N STOPPING|PARTIAL
B Documentum devuaedms32 Y N OFFLINE
B Doucmentum_Env_C devuaedms31 Y N ONLINE
B Doucmentum_Env_C devuaedms32 Y N OFFLINE
B MNICB_iUATgroup devuaedms31 Y N ONLINE
B MNICB_iUATgroup devuaedms32 Y N ONLINE
B cvm devuaedms31 Y N ONLINE
B cvm devuaedms32 Y N OFFLINE|FAULTED
B documentum_bkup devuaedms31 Y N ONLINE

root@devuaedms31 # tail -f engine_A.log
2018/01/03 10:56:03 VCS INFO V-16-6-15004 (devuaedms32) hatrigger:Failed to send trigger for postoffline; script doesn't exist
2018/01/03 10:56:03 VCS INFO V-16-6-15004 (devuaedms31) hatrigger:Failed to send trigger for nofailover; script doesn't exist
2018/01/03 11:00:00 VCS ERROR V-16-10001-1005 (devuaedms32) CVMCluster:???:monitor:node - state: out of cluster
reason: cannot find disk on slave node
2018/01/03 11:05:00 VCS ERROR V-16-10001-1005 (devuaedms32) CVMCluster:???:monitor:node - state: out of cluster
reason: cannot find disk on slave node
2018/01/03 11:10:00 VCS ERROR V-16-10001-1005 (devuaedms32) CVMCluster:???:monitor:node - state: out of cluster
reason: cannot find disk on slave node
2018/01/03 11:15:01 VCS ERROR V-16-10001-1005 (devuaedms32) CVMCluster:???:monitor:node - state: out of cluster
reason: cannot find disk on slave node
B documentum_bkup devuaedms32 Y N OFFLINE

I would like to know i offline the service group , it pending for stopping long time.   Please advice if there is any action I can do to fix the problem .