The directory /var/cluster/ucmm contains the following sources of diagnostic information:
Core files
Log files that provide the following information:
Details of userland cluster membership monitor (UCMM) reconfigurations
Timeout settings
Events that are logged by the UNIX Distributed Lock Manager (Oracle UDLM)
The directory /var/opt/SUNWscor/oracle_server contains log files for the Oracle RAC server resource.
The system messages file also contains diagnostic information.
If a problem occurs with Sun Cluster Support for Oracle Real Application Clusters, consult these files to obtain information about the cause of the problem.