ORA-29701: unable to connect to Cluster Synchronization Service

While starting ASM on 11g grid Infrastructure I was getting following errors :

SQL> connect / as sysasm
Connected to an idle instance.
SQL> startup;
ORA-01078: failure in processing system parameters
ORA-29701: unable to connect to Cluster Synchronization Service
SQL>


Login with the account under which grid Infrastructure is install. In my case it's grid account and check if CSS is up and running.
$ ./crs_stat -t

Name           Type           Target    State     Host       
------------------------------------------------------------
ora.DATA.dg    ora....up.type OFFLINE   OFFLINE              
ora.DATA2.dg   ora....up.type OFFLINE   OFFLINE              
ora....ER.lsnr ora....er.type ONLINE    ONLINE    node2  
ora.asm        ora.asm.type   OFFLINE   OFFLINE              
ora.cssd       ora.cssd.type  ONLINE    OFFLINE              
ora.diskmon    ora....on.type ONLINE    OFFLINE       

Looks like crs not started or autostart is diabled after server reboot. Let check this one out
root@node2 # ./crsctl enable crs
CRS-4013: This command is not supported in a single-node configuration.
CRS-4000: Command Enable failed, or completed with errors.

enable and disabled options are not supported with single-node configuration. Let start all the resources manually.

grid@node2$ $ ./crsctl start resource -all
CRS-5702: Resource 'ora.LISTENER.lsnr' is already running on 'node2'
CRS-2672: Attempting to start 'ora.cssd' on 'node2'
CRS-2679: Attempting to clean 'ora.diskmon' on 'node2'
CRS-2681: Clean of 'ora.diskmon' on 'node2' succeeded
CRS-2672: Attempting to start 'ora.diskmon' on 'node2'
CRS-2676: Start of 'ora.diskmon' on 'node2' succeeded
CRS-2676: Start of 'ora.cssd' on 'node2' succeeded
CRS-2672: Attempting to start 'ora.asm' on 'node2'
CRS-2676: Start of 'ora.asm' on 'node2' succeeded
CRS-2672: Attempting to start 'ora.DATA.dg' on 'node2'
CRS-2672: Attempting to start 'ora.DATA2.dg' on 'node2'
CRS-2676: Start of 'ora.DATA.dg' on 'node2' succeeded
CRS-2676: Start of 'ora.DATA2.dg' on 'node2' succeeded

$ ps -ef | grep cssd

$ ./crs_stat -t
Name           Type           Target    State     Host       
------------------------------------------------------------
ora.DATA.dg    ora....up.type ONLINE    ONLINE    node2  
ora.DATA2.dg   ora....up.type ONLINE    ONLINE    node2  
ora....ER.lsnr ora....er.type ONLINE    ONLINE    node2  
ora.asm        ora.asm.type   ONLINE    ONLINE    node2  
ora.cssd       ora.cssd.type  ONLINE    ONLINE    node2  
ora.diskmon    ora....on.type ONLINE    ONLINE    node2  

back to business!