As the message subtly indicated the problem is not in the execution of your code handling the request, but the Google System preparing itself for delegating the request to your code.
Probably it is trying to startup a new instance, but fails to do so within 10 seconds ( check the Request Time/Latency value). There can be a number of causes for this ranging from general stress on the Google system to too many libraries and/or too many lengthy static initialisation of classes. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
