Hi, Thomas.
I believe it's only shown because by default most logs' levels in Gluu are set to "Debug". So it traces every step providing as more info as possible. You can control log verbosity for oxauth and oxtrust by editing /opt/tomcat/webapps/oxauth/WEB-INF/classes/log4j.xml and /opt/tomcat/webapps/identity/WEB-INF/classes/log4j.xml files, correspondingly. May be others will provide better advice, though.
Alex.