Hi, Short summary:
My async psgi application from time to time gets request environment with two set of headers from different HTTP requests combined into one. Longer version: nginx in front proxy passing requests to uwsgi back-end running app with psgi and coroae plugins. I can not reproduce this problem in isolated environment, so I only have set of logs from fronts and backs. Two requests on one front-end: [15/Sep/2015:14:41:15 +0300] "GET /tennis/fedcup/ HTTP/1.1" 200 70202 "-" "Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)" "157.55.39.48" MISS [0.406, 1.254] 1.669 {192.168.1.42:5002, 192.168.1.43:5002} 282 [15/Sep/2015:14:41:15 +0300] "GET / HTTP/1.1" 404 16404 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_5) AppleWebKit/600.7.12 (KHTML, like Gecko) Version/6.2.7 Safari/537.85.16" "86.203.194.13" HIT [0.010] 0.011 { 192.168.1.42:5002} 1758 Both hit .42 backend, first request got some error response and bounced to another backend for retry. On the backend in uwsgi access log I see only one request: [pid: 10585|app: 0|req: 100077/199815] 192.168.1.11 () {72 vars in 2526 bytes} [Tue Sep 15 14:41:15 2015] GET /desktop/ => generated 9 bytes in 8 msecs (HTTP/1.0 404) 1 headers in 67 bytes (1 switches on core 127) In app's log I see the following: request for /desktop/tennis/fedcup/, /desktop/ on www.sports.ru, www.sports.ru App logs $env->{REQUEST_URI} and $env->{HTTP_HOST} at the beginning. >From psgi's plugin source code I see that if a header repeated multiple times in the request then into perl world it gets as comma separated record in the environment hash. This is why I made conclusion that these are two requests combined into one. Any ideas on why this is happening? On how to debug this? reproduce? PS: It may be related to harikiri. We don't have harakiri log entries in these logs, but they show up on a console and we feel that they are related to this problem. -- Руслан Закиров Руководитель отдела разработки веб-сервисов +7(916) 597-92-69, ruz @ <http://www.sports.ru/>
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