ORA-29701: unable to connect to Cluster Manager on

checking the grep cssd I saw it was running as root user

+ASM:/home/oracle $ ps -ef | grep css

root 60799 20 0 10:14:39 ? 0:00 /bin/sh /sbin/init.d/init.cssd run

then asking the SA to do

localconfig delete

localconfig add

under OH fixed the issue by starting css the right way

oracle 35487 20 0 14:10:33 ? 0:00 /apps/oracle/product/10.2.0.3/bin/ocssd.bin

on 11gR2

mp012:+ASM:/apps/oracle/product/11.2.0/grid/dbs: crsctl start resource ora.cssd

CRS-2672: Attempting to start 'ora.cssd' on 'mp012'

CRS-2672: Attempting to start 'ora.diskmon' on 'mp012'

CRS-2676: Start of 'ora.diskmon' on 'mp012' succeeded

CRS-2676: Start of 'ora.cssd' on 'mp012' succeeded

mp012:+ASM:/apps/oracle/product/11.2.0/grid/dbs: crsctl modify resource "ora.cssd" -attr "AUTO_START=1"

mp012:+ASM:/apps/oracle/product/11.2.0/grid/dbs: crsctl modify resource "ora.diskmon" -attr "AUTO_START=1"