google app engine INFO meaning

Question

Im testing an appengine application localy and I want to know what the last numbers in the INFO log, mean

INFO 2013-08-30 00:15:12,914 module.py:593] default: "GET /mobile/ HTTP/1.1" 404 154

Answer 1

404 = Page not found.

154 = Size of the response content in bytes.

Answer 2

Page not found. In other words, you do not have url mapping to the url "/mobile/". Check urls.py (for example, in django/python) and or app.yaml, to make sure you tell the app where a request to "/mobile/" should point. Post parts of your app.yaml, or your code for url mapping, if you need further troubleshooting