I have 11g 2-node RAC. My alert.log contains several ORA-03137 errors:
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl2/trace/orcl2_ora_10679.trc (incident=149362): ORA-03137: TTC protocol internal error :         Fri Jan 17 17:01:56 2014 Sweep [inc]: completed
and incident files are created..
How to solve this error? It is generated almost in every 7-8 minutes.