# Does it possible to submit duplicated request with the proxy\_next\_upstream on **URL:** \ **Category:** NGINX\ **Created:** [January 3, 2014, 4:04pm UTC](https://www.ruby-forum.com/t/does-it-possible-to-submit-duplicated-request-with-the-proxy-next-upstream-on/238322 "2014-01-03T16:04:17Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Post date:** [January 3, 2014, 4:04pm UTC](https://www.ruby-forum.com/t/does-it-possible-to-submit-duplicated-request-with-the-proxy-next-upstream-on/238322/1 "2014-01-03T16:04:17Z")
Hi all: I am wondering if I set: proxy\_next\_upstream error timeout; Fox example , if the requested service is a counter , I issue the request use the interface [http://example.com/incr](http://example.com/incr) . The request is failed on my first host A, then it is passed to the second host B , is the counter likely be added twice ? thanks . ---
**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [January 14, 2014, 9:53am UTC](https://www.ruby-forum.com/t/does-it-possible-to-submit-duplicated-request-with-the-proxy-next-upstream-on/238322/2 "2014-01-14T09:53:09Z")
Can any one help ? 2014/1/3 ȫ [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [January 14, 2014, 10:56pm UTC](https://www.ruby-forum.com/t/does-it-possible-to-submit-duplicated-request-with-the-proxy-next-upstream-on/238322/3 "2014-01-14T22:56:02Z")
Unless the request is getting que’d while there is a short wait for host A to get online AND fail-over is also happening, its not likely to be added twice. Posted at Nginx Forum: > **[Re: Does it possible to submit duplicated request with the...](https://forum.nginx.org/read.php?2,245979,246388#msg-246388)** > > Hi all: I am wondering if I set: proxy\_next\_upstream error timeout; Fox example , if the requested service is a counter , I issue the request use the interface http://example.com/incr . The request is failed on my first host A, then it is passed to... ---
**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [January 16, 2014, 1:00pm UTC](https://www.ruby-forum.com/t/does-it-possible-to-submit-duplicated-request-with-the-proxy-next-upstream-on/238322/4 "2014-01-16T13:00:43Z")
## renenglish Wrote: > Sorry I can’t get it . > > If host A has added the counter and failed to response, the request > would be failed over to host B with successful response, so the > counter would be added twines. Wouldn’t it ? Then a condition must occur where host A fails right after processing the request, they usually fail before accepting a request, it also depends on the timeout for a request. And it also depends what nginx considers a fail, nginx might not fail a host when it does not return from accepting a request. You will have to simulate this to find out the conditions for a fail. Posted at Nginx Forum: > **[Re: Does it possible to submit duplicated request with the...](https://forum.nginx.org/read.php?2,245979,246505#msg-246505)** > > Hi all: I am wondering if I set: proxy\_next\_upstream error timeout; Fox example , if the requested service is a counter , I issue the request use the interface http://example.com/incr . The request is failed on my first host A, then it is passed to... ---
**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [January 17, 2014, 4:25am UTC](https://www.ruby-forum.com/t/does-it-possible-to-submit-duplicated-request-with-the-proxy-next-upstream-on/238322/5 "2014-01-17T04:25:24Z")
OK. Thank you very much . I will do an experiment to find out this 2014/1/16 itpp2012 [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [January 16, 2014, 10:20am UTC](https://www.ruby-forum.com/t/does-it-possible-to-submit-duplicated-request-with-the-proxy-next-upstream-on/238322/6 "2014-01-16T10:20:38Z")
Sorry I cant get it . If host A has added the counter and failed to response, the request would be failed over to host B with successful response, so the counter would be added twines. Wouldnt it ? 2014114գ5:48itpp2012 [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) д