# 502 Proxy Error **URL:** \ **Category:** NGINX\ **Created:** [April 17, 2010, 11:03am UTC](https://www.ruby-forum.com/t/502-proxy-error/187112 "2010-04-17T11:03:27Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![chuj625](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/977dab/32.png) [@chuj625](https://www.ruby-forum.com/u/chuj625)\ **Post date:** [April 17, 2010, 11:03am UTC](https://www.ruby-forum.com/t/502-proxy-error/187112/1 "2010-04-17T11:03:27Z")
i build a service with nginx When i visit it frequently(serval times per second, may be more frequently), it will delay the request or just give back “502 Proxy Error” What shall i do if i do not want it to delay requests or give back 502 error? Posted at Nginx Forum: > **[502 Proxy Error](https://forum.nginx.org/read.php?2,76016,76016#msg-76016)** > > i build a service with nginx When i visit it frequently(serval times per second, may be more frequently), it will delay the request or just give back "502 Proxy Error" What shall i do if i do not want it to delay requests or give back 502... ---
**Author:** ![chuj625](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/977dab/32.png) [@chuj625](https://www.ruby-forum.com/u/chuj625)\ **Post date:** [April 17, 2010, 11:10am UTC](https://www.ruby-forum.com/t/502-proxy-error/187112/2 "2010-04-17T11:10:29Z")
On Sat, Apr 17, 2010 at 05:02:21AM -0400, chuj625 wrote: > i build a service with nginx > When i visit it frequently(serval times per second, may be more frequently), > it will delay the request or just give back “502 Proxy Error” > What shall i do if i do not want it to delay requests or give back 502 error? Could you provide configuration file of your nginx. – Sergey A. Osokin, [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![chuj625](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/977dab/32.png) [@chuj625](https://www.ruby-forum.com/u/chuj625)\ **Post date:** [April 17, 2010, 11:10am UTC](https://www.ruby-forum.com/t/502-proxy-error/187112/3 "2010-04-17T11:10:29Z")
On Sat, Apr 17, 2010 at 5:02 PM, chuj625 [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > i build a service with nginx > When i visit it frequently(serval times per second, may be more frequently), it will delay the request or just give back “502 Proxy Error” > What shall i do if i do not want it to delay requests or give back 502 error? > To avoid 502 error, you should:check where the bottleneck is firstly. > Do you run php as fastcgi server, and 502 occurs when you access a PHP > page? If so, you would want to increase the size of buffer for fastcgi > communication. And, optimize the php script executive time is also > needed. E.g., optimize the database, in order to decrease the > executive time. – Ren Xiaolei ---
**Author:** ![chuj625](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/977dab/32.png) [@chuj625](https://www.ruby-forum.com/u/chuj625)\ **Post date:** [April 17, 2010, 12:50pm UTC](https://www.ruby-forum.com/t/502-proxy-error/187112/4 "2010-04-17T12:50:34Z")
1 worker\_processes 5; 2 error\_log /var/log/nginx/error.log; 3 pid /var/log/nginx/nginx.pid; 4 worker\_rlimit\_nofile 8192; 5 6 events { 7 worker\_connections 4096; 8 } 9 10 http { 11 default\_type application/octet-stream; 12 log\_format main '$remote\_addr - $remote\_user [$time\_local] $status ’ 13 '“$request” $body\_bytes\_sent “$http\_referer” ’ 14 ‘“$http\_user\_agent” “$http\_x\_forwarded\_for”’; 15 16 upstream ltp\_server { 17 server 192.168.1.1:12345; 18 server 192.168.1.2:12345; 19 server 192.168.1.3:12345; 20 server 192.168.1.4:12345; 21 } 22 23 server { # LTP load balancing with password 24 listen 54321; 25 access\_log /var/log/nginx/ltp.server.access.log main; 26 27 location / { 28 proxy\_pass http://ltp\_server; 29 auth\_basic “TEST Web Service”; 30 auth\_basic\_user\_file ltpasswd; 31 } 32 } 33 34 server { # TEST load balancing without password 35 listen 12345; 36 access\_log /var/log/nginx/test.server.access.log main; 37 38 location / { 39 proxy\_pass http://ltp\_server; 40 # auth\_basic “TEST Web Service”; 41 # auth\_basic\_user\_file testpasswd; 42 } 43 } 44 } Posted at Nginx Forum: > **[Re: 502 Proxy Error](https://forum.nginx.org/read.php?2,76016,76038#msg-76038)** > > i build a service with nginx When i visit it frequently(serval times per second, may be more frequently), it will delay the request or just give back "502 Proxy Error" What shall i do if i do not want it to delay requests or give back 502... ---
**Author:** ![chuj625](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/977dab/32.png) [@chuj625](https://www.ruby-forum.com/u/chuj625)\ **Post date:** [April 17, 2010, 1:01pm UTC](https://www.ruby-forum.com/t/502-proxy-error/187112/5 "2010-04-17T13:01:42Z")
well, you mean it is not a nginx problem? i have to see if there is any problem with my project sometimes it does go really well, but 502 problem occures every now and then ps. it’s not a php service Posted at Nginx Forum: > **[Re: 502 Proxy Error](https://forum.nginx.org/read.php?2,76016,76039#msg-76039)** > > i build a service with nginx When i visit it frequently(serval times per second, may be more frequently), it will delay the request or just give back "502 Proxy Error" What shall i do if i do not want it to delay requests or give back 502... ---
**Author:** ![chuj625](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/977dab/32.png) [@chuj625](https://www.ruby-forum.com/u/chuj625)\ **Post date:** [April 17, 2010, 3:51pm UTC](https://www.ruby-forum.com/t/502-proxy-error/187112/6 "2010-04-17T15:51:24Z")
On Sat, Apr 17, 2010 at 7:00 PM, chuj625 [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > well, you mean it is not a nginx problem? > > i have to see if there is  any problem with my project > sometimes it does go really well, but 502 problem occures every now and then > > ps. it’s not a php service ## Hmm, proxy app. Check error.log file, see what happens. Ren Xiaolei