Hi I am using 1.4.22. Turned out there was some network issue from between the haproxy node and one of the servers. That was why I kept getting 502 when that server is included in backend
Thanks a lot Wei On Jan 23, 2013, at 23:56, Baptiste <[email protected]> wrote: > Hi Wei, > > Which version of HAProxy are you running? > In recent 1.5 branch, there were bugs leading to 502 errors on POST. > You might be in that case. > > cheers > > > On Thu, Jan 24, 2013 at 7:03 AM, Wei Kong <[email protected]> wrote: >> I tested using a script that simply calls a curl to access a url in a >> loop. If I have two servers in the backend, the script will hang after a >> while. But if I only have one server in the backend, the script will be >> able to continue. >> >> We are using the most basic haproxy setting, why is it having issues when >> there are more than one server configured in the backend? >> >> On 1/23/13 11:00 AM, "Wei Kong" <[email protected]> wrote: >> >>> Hi, >>> >>> I found out that if I take out one server from node_admin backend, it >>> works much better. Can someone please help shed some lights on this issue? >>> Is it related to some session/cache issue? >>> >>> Wei >>> >>> On 1/23/13 10:34 AM, "Wei Kong" <[email protected]> wrote: >>> >>>> We are getting a lot of 502 errors from haproxy on a server that is not >>>> too busy >>>> >>>> The logged message shows >>>> >>>> Jan 23 18:31:01 preview2-stratus-admin-1 haproxy[28352]: >>>> 50.196.128.9:54443 [23/Jan/2013:18:29:01.649] node_frontend >>>> node_admin/server1 6/0/2/-1/+120043 502 +204 - - SH-- 2/2/0/0/0 0/0 "POST >>>> /log/pixgrid/NOSERVERID/2013-01-23T18:07:08.066Z/NODATETME/1/100 >>>> HTTP/1.1" >>>> >>>> What does SH mean here? >>>> >>>> Our haproxy config: >>>> >>>> global >>>> daemon >>>> maxconn 10000 >>>> stats socket /var/run/haproxy.stat mode 666 level admin >>>> >>>> defaults >>>> mode http >>>> retries 3 >>>> timeout connect 6000ms >>>> timeout http-request 60000ms >>>> timeout client 600000ms >>>> timeout server 600000ms >>>> option httplog >>>> option logasap >>>> log global >>>> log 127.0.0.1 local0 >>>> log 127.0.0.1 local1 notice >>>> option httpclose >>>> no option checkcache >>>> >>>> >>>> frontend node_frontend >>>> bind *:7000 >>>> bind *:80 >>>> acl is_admin hdr_beg(host) -i <adminhost> >>>> use_backend node_admin if is_admin >>>> default_backend default >>>> >>>> backend default >>>> mode http >>>> server server0 127.0.0.1:7002 maxconn 10 >>>> >>>> backend node_admin >>>> mode http >>>> server server0 127.0.0.1:7001 maxconn 150 >>>> server server1 10.171.99.144:7001 maxconn 200 >> >> >>
