The crossdomain proxy has unnecessarily verbose logging. Every time the GCalendar tool is rendered, the following info message is logged. It looks like the verbosity level is defined in:
crossdomain/src/main/resources/log4j.properties

2013-12-12 10:26:29,825 [ajp-apr-127.0.0.1-8009-exec-44] INFO org.apache.catalina.core.ContainerBase.[Catalina].[localhost]./crossdomain - gcalendar: proxy GET uri: /crossdomain/gcalendar/calendar/v3/calendars/umich.edu_vsthjbriukr3o57t13nfvts60o@group.calendar.google.com/events – https://www.googleapis.com/calendar/v3/calendars/umich.edu_vsthjbriukr3o57t13nfvts60o@group.calendar.google.com/events?access_token=1/N8b_XZsvzWY8KUJi7kfp0xYLvkTMSTPvZHqXyCmz8jc&90&timeMin=2013-12-01T05%3A00%3A00.000Z&timeMax=2014-01-12T05%3A00%3A00.000Z&singleEvents=true&showDeleted=false&_=1386861989374

The Smiley proxy that we use logs using the servlet context log method. This logging is not controlled by log4j. The logging property must be modified directly in the web.xml file configuring the proxy servlet. The change should be made for the proxy to be run within the gcalendar project (see ). No changes to the crossdomain are required since it will be obsolete.

The change is to modify the value of the 'log' param to 'false' in the appropriate section of the configuration xml. E.g.
:
:
<init-param>
<param-name>log</param-name>
<param-value>false</param-value>
</init-param>
:
: