what does this mean: Got /gwtRequest with null response, returning null

Hello,

I am getting this line in my log files,
but don't know what , if any, is wrong ?

FINE: Got /gwtRequest with null response, returning null.
also
FINE: Got /xxxxApp/remote_logging with null response, returning null.

RequestFactory returns the result, and everything appears to be working fine,
do you know what that log message means ?

Thank You

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