Simple proxy occasionally fails

Server NGINX
1

Simple proxy config fails occasionally with errors. Apache and nginx
are
running on 4 web servers. Nginx is used by the web app to proxy between
two
lucene/solr search servers.

Nginx config on each web server:
http://pastebin.com/m12448635

Every so often I get a crit error:
http://pastebin.com/m4dbfe328

My first expedition into using nginx. Pointing the web app to use one
lucene/solr server directly works fine.

2

Hello!

On Tue, Aug 12, 2008 at 08:10:10PM -0700, Kris S. Amundson wrote:

Simple proxy config fails occasionally with errors. Apache and nginx are
running on 4 web servers. Nginx is used by the web app to proxy between two
lucene/solr search servers.

Nginx config on each web server:
http://pastebin.com/m12448635

Every so often I get a crit error:
http://pastebin.com/m4dbfe328

It looks like you are facing firewall sometimes blocking
connections to backend. I’ve seen this happending with pf when
new connection collide with already existing state in pf for
connection in TIME_WAIT state.

Solution is to switch firewall off (or at least statefull part of
it) for backend connections.

Maxim D.