On gateway 10.1, both software and appliance form factors, the /opt/SecureSpan/Gateway/config/logs/config.log is not generated.
Release : 10.1
Component : API GATEWAY
It may be due to the major version switch of the JDK
Change the /opt/SecureSpan/Gateway/config/configlogging.properties to,
# Customized logging configuration for config client
handlers = java.util.logging.FileHandler
java.util.logging.FileHandler.formatter = java.util.logging.SimpleFormatter
java.util.logging.FileHandler.pattern = logs/config.log