ORA-29702: error occurred in Cluster Group Service operatio

I faced with that error on r12.1.3 EBS system. My db version is 11.2&2 node RAC system. My first node is goes down by below errors: opiodr aborting process unknown ospid (11075852) as a result of ORA-28 LMON (ospid: 63767522) detects hung instances during IMR reconfiguration LMON (ospid: 63767522) tries to kill the instance 2. Continue reading