GWT Logging

Hi All, 
How can i write log message in a file (/WEB-INF/logs) in GWT? it seems log4j is not supported but then i wrote a servlet (to be loaded when application starts to load my custom "logging.properties"(from /WEB-INF/classes/logging.properties) file and load it into java.util.LogManager but i get below error 

java.lang.NoClassDefFoundError: java.util.logging.LogManager is a restricted class. Please see the Google App Engine developer's guide for more details. 

my point here is to write log messages into a file under /WEB-INF/logs. 

Thanks, 
Vikas.

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscribe@googlegroups.com.
To post to this group, send email to google-web-toolkit@googlegroups.com.
Visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.