Looking at the user agent (assuming I am interpreting it correctly) you are being hit by google bot. Its probably hitting you very fast and each request can not be serviced so it causes heaps of new instances to be started to service the requests.
It's odd you instance is failing immediately with error 121. I have had similiar problems in the past from google bot (though not mobile) and was able to get my site flagged so that google bot wouldn't hit it so hard and fast. That might be worth looking at - where the/what user request is prompting the instance start requests. I find the only times where I get instances started rapidly are when a bot hits me. The main culprit at the moment is Sosospider/2.0; +http://help.soso.com/webspider.htm) T On Wednesday, July 24, 2013 11:30:45 AM UTC+8, GAEfan wrote: > > My app started serving 500s tonight, with no changes to the code for many > days. > > It is telling me exit_code=121 > > If I continue to refresh, eventually the page loads. Seems the instances > are crashing at spinup. One instance appears in the admin console > dashboard, but if I click on the instances link, none show up. > > Remainder of log: > > > 1. 500 1829ms 0kb Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac > OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 > Mobile/8B117 Safari/6531.22.7 (compatible; Googlebot-Mobile/2.1; + > http://www.google.com/bot.html) > > 66.249.75.198 - - [23/Jul/2013:20:02:53 -0700] "GET /page/ HTTP/1.1" 500 0 > - "Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; en-us) > AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 > Safari/6531.22.7 (compatible; Googlebot-Mobile/2.1; > +http://www.google.com/bot.html)" "www.mydomain.com" ms=1830 cpu_ms=780 > loading_request=1 exit_code=121 app_engine_release=1.8.2 > instance=00c61b117cc97a586b8c77ba707be8ecf482 > <https://appengine.google.com/instances?app_id=s~crystal-bull&version_id=713.368782097257250375&key=00c61b117cc97a586b8c77ba707be8ecf482#00c61b117cc97a586b8c77ba707be8ecf482> > > 2. I2013-07-23 20:02:53.821 > > This request caused a new process to be started for your application, and > thus caused your application code to be loaded for the first time. This > request may thus take longer and use more CPU than a typical request for your > application. > > 3. W2013-07-23 20:02:53.821 > > A problem was encountered with the process that handled this request, > causing it to exit. This is likely to cause a new process to be used for the > next request to your application. (Error code 121) > > > > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at http://groups.google.com/group/google-appengine. For more options, visit https://groups.google.com/groups/opt_out.
