Hi Mind, Generally, I would suggest settings appropriate number of 'Min Idle Instances' for such errors. However, it's not possible to give a proper advise from information you've provided.
What is your app-id? How long is the average latency of your program? Have you used appstats for profiling? Re: memcache Don't rely entirely on the memcache service, because currently the memcache contents might be evicted any time. -- Takashi On Fri, Jul 6, 2012 at 11:45 AM, Mind <[email protected]> wrote: > I have a GAE app written in Python that provides the back end for a > multi-player Android game. The game just got 'featured' on Google Play. > > Usage has significantly increased, and I am starting to see errors like > the following: > > > 1. > > 68.48.166.111 - - [05/Jul/2012:19:33:27 -0700] "GET /client/gs HTTP/1.1" > 500 0 - "Apache-HttpClient/UNAVAILABLE (java 1.4)" > "sven-wordhero.appspot.com" ms=21604 cpu_ms=0 api_cpu_ms=0 cpm_usd=0.000031 > pending_ms=10963 > > 2. I 2012-07-05 22:33:27.594 > > Request was aborted after waiting too long to attempt to service your > request. > > > I don't have quota problems (using 1/10th of daily quota atm) and I don't > have an upper limit on the number of instances. The code is Python 2.7 and > marked thread-safe. > > Here is the code that is failing to respond (in about 8% of cases)... > actually, I don't even think this code gets a chance to run (GAE just fails > to respond to the HTTP GET?): > > lg_ref = LastGame.get_by_key_name('current_game') > results = lg_ref.gameStorageKey > > out = {'u': results.players, > 's': results.scores, > } > return self.response.out.write(json.dumps(out)) > > Since the game is synchronized, I have about 500 users hit this URL within > a 5 second window. No, I cannot use memcache. It is BROKEN. It randomly > fails to update the results (even with expiry time set!) and then provides > the results from the PREVIOUS game. Users don't like that! > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To view this discussion on the web visit > https://groups.google.com/d/msg/google-appengine/-/newhM5g7zPMJ. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > -- Takashi Matsuo -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
