# 499 errors **URL:** \ **Category:** NGINX\ **Created:** [June 17, 2010, 4:22pm UTC](https://www.ruby-forum.com/t/499-errors/190210 "2010-06-17T16:22:21Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![ntran](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/73ab20/32.png) [@ntran](https://www.ruby-forum.com/u/ntran)\ **Post date:** [June 17, 2010, 4:22pm UTC](https://www.ruby-forum.com/t/499-errors/190210/1 "2010-06-17T16:22:21Z")
We have a Rails app with nginx proxying requests to 2 mongrel servers. I’m seeing a lot of 499 errors crop up, for example: lodgeit.aioi.local-access.log-20100603:192.168.0.50 - - [02/Jun/2010:09:32:39 +1000] “GET /?page=61 HTTP/1.1” 499 0 “[http://lodgeit/?page=57](http://lodgeit/?page=57)” “Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)” lodgeit.aioi.local-access.log-20100603:192.168.0.50 - - [02/Jun/2010:09:32:39 +1000] “GET /?page=61 HTTP/1.1” 499 0 “[http://lodgeit/?page=57](http://lodgeit/?page=57)” “Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)” lodgeit.aioi.local-access.log-20100603:192.168.0.50 - - [02/Jun/2010:09:32:39 +1000] “GET /?page=61 HTTP/1.1” 499 0 “[http://lodgeit/?page=57](http://lodgeit/?page=57)” “Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)” lodgeit.aioi.local-access.log-20100603:192.168.0.50 - - [02/Jun/2010:09:32:40 +1000] “GET /?page=61 HTTP/1.1” 499 0 “[http://lodgeit/?page=57](http://lodgeit/?page=57)” “Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)” lodgeit.aioi.local-access.log-20100603:192.168.0.50 - - [02/Jun/2010:09:32:40 +1000] “GET /?page=61 HTTP/1.1” 499 0 “[http://lodgeit/?page=57](http://lodgeit/?page=57)” “Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)” lodgeit.aioi.local-access.log-20100603:192.168.0.50 - - [02/Jun/2010:09:32:40 +1000] “GET /?page=61 HTTP/1.1” 499 0 “[http://lodgeit/?page=57](http://lodgeit/?page=57)” “Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)” lodgeit.aioi.local-access.log-20100603:192.168.0.50 - - [02/Jun/2010:09:32:40 +1000] “GET /?page=61 HTTP/1.1” 499 0 “[http://lodgeit/?page=57](http://lodgeit/?page=57)” “Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)” lodgeit.aioi.local-access.log-20100603-192.168.0.50 - - [02/Jun/2010:09:32:42 +1000] “GET /?page=61 HTTP/1.1” 200 13763 “[http://lodgeit/?page=57](http://lodgeit/?page=57)” “Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)” I understand the 499 error is because of the client closing the connection before nginx can send the response. I hope someone more technical than me can explain what might be causing 7 GETs in the space of one second. Users are using Firefox. I wonder if Firefox might be causing this behaviour? ## Thanks in advance Nick ---
**Author:** ![ntran](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/73ab20/32.png) [@ntran](https://www.ruby-forum.com/u/ntran)\ **Post date:** [June 17, 2010, 4:22pm UTC](https://www.ruby-forum.com/t/499-errors/190210/2 "2010-06-17T16:22:41Z")
192.168.0.50 is a reverse proxy? On Thu, Jun 17, 2010 at 1:42 PM, Nick T. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > We have a Rails app with nginx proxying requests to 2 mongrel servers. I’m seeing a lot of 499 errors crop up, for example: > > lodgeit.aioi.local-access.log-20100603:192.168.0.50 - - [02/Jun/2010:09:32:39 +1000] “GET /?page=61 HTTP/1.1” 499 0 “[http://lodgeit/?page=57](http://lodgeit/?page=57)” “Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.1.7) Gecko/20091221 Firefox/3.5.7 (.NET CLR 3.5.30729)” > I understand the 499 error is because of the client closing the connection before nginx can send the response. I hope someone more technical than me can explain what might be causing 7 GETs in the space of one second. Users are using Firefox. I wonder if Firefox might be causing this behaviour? – Ren Xiaolei ---
**Author:** ![ntran](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/73ab20/32.png) [@ntran](https://www.ruby-forum.com/u/ntran)\ **Post date:** [June 17, 2010, 11:52pm UTC](https://www.ruby-forum.com/t/499-errors/190210/3 "2010-06-17T23:52:49Z")
192.168.0.50 is a terminal server. – Nick T. Analyst/Programmer Aioi Insurance Co., Ltd T: +61 3 9869 0125 E: removed\_email\_address@domain.invalid[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) On 17/06/2010, at 8:22 PM, 任晓磊 wrote: 192.168.0.50 * * * This email is intended for the use of the individual or entity it is addressed to and may contain information that is confidential, legally privileged, commercially sensitive, or protected by copyright. If it contains financial product advice, the advice is of a general nature and you will need to determine how appropriate it is for you. If you are not the intended recipient you must not disclose, disseminate, distribute or copy information contained in it. If you have received this e-mail in error, please notify the sender immediately and destroy the original message. While this mail and any attachments have been scanned for common computer viruses and found to be virus free, we recommend that you perform your own virus checks before opening any attachments. * * * This email has been scrubbed for your protection by SMX. For more information visit [http://smxemail.com](http://smxemail.com) ---
**Author:** ![ntran](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/73ab20/32.png) [@ntran](https://www.ruby-forum.com/u/ntran)\ **Post date:** [June 18, 2010, 5:46am UTC](https://www.ruby-forum.com/t/499-errors/190210/4 "2010-06-18T05:46:20Z")
I can’t understand. What’s terminal server? like Windows Terminal Service? On Fri, Jun 18, 2010 at 5:51 AM, Nick T. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > 192.168.0.50 is a terminal server. – Ren Xiaolei ---
**Author:** ![ntran](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/73ab20/32.png) [@ntran](https://www.ruby-forum.com/u/ntran)\ **Post date:** [June 18, 2010, 11:10am UTC](https://www.ruby-forum.com/t/499-errors/190210/5 "2010-06-18T11:10:03Z")
Maybe some user is trying a automatic script to refresh that URL? On Fri, Jun 18, 2010 at 12:31 PM, Nick T. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Yes, sorry, exactly that… 192.168.0.50 is the IP address of the machine > from which most users connect to the web application. – Ren Xiaolei ---
**Author:** ![ntran](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/73ab20/32.png) [@ntran](https://www.ruby-forum.com/u/ntran)\ **Post date:** [June 18, 2010, 6:32am UTC](https://www.ruby-forum.com/t/499-errors/190210/6 "2010-06-18T06:32:34Z")
Yes, sorry, exactly that… 192.168.0.50 is the IP address of the machine from which most users connect to the web application. – Nick T. Analyst/Programmer Aioi Insurance Co., Ltd T: +61 3 9869 0125 E: removed\_email\_address@domain.invalid[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) On 18/06/2010, at 1:45 PM, 任晓磊 wrote: I can’t understand. What’s terminal server? like Windows Terminal Service? On Fri, Jun 18, 2010 at 5:51 AM, Nick T. \ wrote: 192.168.0.50 is a terminal server. – Ren Xiaolei * * * nginx mailing list removed\_email\_address@domain.invalid[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [http://nginx.org/mailman/listinfo/nginx](http://nginx.org/mailman/listinfo/nginx) * * * This email is intended for the use of the individual or entity it is addressed to and may contain information that is confidential, legally privileged, commercially sensitive, or protected by copyright. If it contains financial product advice, the advice is of a general nature and you will need to determine how appropriate it is for you. If you are not the intended recipient you must not disclose, disseminate, distribute or copy information contained in it. If you have received this e-mail in error, please notify the sender immediately and destroy the original message. While this mail and any attachments have been scanned for common computer viruses and found to be virus free, we recommend that you perform your own virus checks before opening any attachments. * * * This email has been scrubbed for your protection by SMX. For more information visit [http://smxemail.com](http://smxemail.com)