We have 3 node RAC. In one of the node clusterware is down and also CSSD process is down. I got to know that we have to clear socket files in that node.
Please let me know what needs to be done instead ofclearing socket files.
Please find db details
Oracle Database 11g Enterprise Edition Release 188.8.131.52.0 - 64bit Production
PL/SQL Release 184.108.40.206.0 - Production
CORE 220.127.116.11.0 Production
TNS for Linux: Version 18.104.22.168.0 - Production
NLSRTL Version 22.214.171.124.0 - Production
CRS-4638: Oracle High Availability Services is online
CRS-4535: Cannot communicate with Cluster Ready Services
CRS-4529: Cluster Synchronization Services is online
Please check following on node which is having issue:
1) ping to other nodes private Ips
2) voting disks are available and have correct permssions
3) check ocssd logs =, it may have necessary information about failure.
why do you need to even clear the sockets file.... just bring down the crs and start it up again... if you face the same issue again... then check the alert log to find out what is actually going on...