Dave,
The same logs include both backend and frontend instance logging- they are
not separated. You could be experiencing a delay before long-running
backend log writes get flushed.
You might be interested in the LogService API,
http://code.google.com/appengine/docs/python/backends/logserviceapi.html
which lets you periodically flush logs during long-running requests, and to
examine an application's request logs and application logs.
On Sun, Jan 15, 2012 at 3:27 AM, Dave Loomer dloo...@gmail.com wrote:
The docs for downloading logs make no specific mention of backends,
and from my attempts it seems that you can only download logs for your
frontend. That would be strange though, and to make matters worse a
web search for google app engine download backend logs (no quotes
obvs.) reveals nothing relevant. Either I'm a true pioneer here or no
one else has had any troubles with this -- or no one else cares. Here
is what I've tried.
First, the documented syntax (which gets you the frontend logs - no
issues here):
appcfg.py request_logs myapp/ mylogs.txt
So to get the backend logs I have tried:
appcfg.py backends request_logs myapp/ mylogs.txt backend-name
(Returns the error: appcfg.py: error: Expected a directory and
action argument.)
appcfg.py backends request_logs myapp/ backend-name mylogs.txt
(As expected, returns the same error: appcfg.py: error: Expected a
directory and action argument.)
appcfg.py seems confused by backends request_logs so I then tried,
without the backends argument:
appcfg.py request_logs myapp/ backend-name mylogs.txt
(Returns the error: appcfg.py: error: Expected a directory argument
and an output_file argument.)
appcfg.py request_logs myapp/ mylogs.txt backend-name
(Same thing: returns the error: appcfg.py: error: Expected a
directory argument and an output_file argument.)
And there is also the documented -vhost to restrict by domain:
appcfg.py --vhost=http://backend-name.app-name.appspot.com
request_logs myapp/ mylogs.txt
(console just shows that is downloading a frontend version number, and
the result is that I get nothing downloaded, probably because there
are no requests going to my frontend using my backend host name.)
So ... did Google really leave this out, or what am I missing?
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