All log files related to failover are available under BASEDIR/smarts/local/logs directory.
The <failover_manager>.actions.log file contains the details of the actions that Failover Manager performed. This file is generated only if the ActionLogging parameter is set to TRUE in the failover.conf file.
The <failover_manager>.actions.log file is generated after you reload the failover.conf and if you reconfigure the Failover Manager using the Domain Manager Administration Console.
The <failover_manager>_en_US_UTF-8.log file lists startup messages for the Failover Manager.
sm_configureFailover<timestamp>.log contains the subscriptions made and the entries added to the failover.conf file.