nginx + haproxy + mongrel - issue persists

[Asif Ali]

We have configured nginx +  haproxy + mongrels [ more than 150 instances].
While it works perfectly fine for small configuration, a larger set of
mongrels - fail completely.

I have attached the configuration file for your reference. Apologies for the
inconvenience if this is coming into the wrong list.

Each of those servers are 16G RAM, Quad Core, Dual Processor Machines by
Dell. So - the memory shouldn't really be a problem.

Although someone did mention that ip_conntrack module might be a problem.

I am not sure what the issue is and not able to understand  - why haproxy is
unable to route requests.

Can you please tell me if there could be some other issue? All the servers
are marked DOWN even through they're up



Nov 21 14:08:46 mw-server9 haproxy[323]: Server rails_proxy/mon170 is DOWN.
0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:08:46 mw-server9 haproxy[323]: Proxy rails_proxy has no server
available !
Nov 21 14:08:49 mw-server9 haproxy[323]: Server rails_proxy/mon078 is DOWN.
0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:08:49 mw-server9 haproxy[323]: Proxy rails_proxy has no server
available !
Nov 21 14:08:54 mw-server9 haproxy[323]: Server rails_proxy/mon166 is DOWN.
0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:08:54 mw-server9 haproxy[323]: Proxy rails_proxy has no server
available !
Nov 21 14:08:54 mw-server9 haproxy[323]: Server rails_proxy/mon167 is DOWN.
0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:08:54 mw-server9 haproxy[323]: Proxy rails_proxy has no server
available !
Nov 21 14:08:56 mw-server9 haproxy[323]: Server rails_proxy/mon081 is DOWN.
1 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:08:56 mw-server9 haproxy[323]: Server rails_proxy/mon089 is DOWN.
0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:08:56 mw-server9 haproxy[323]: Proxy rails_proxy has no server
available !
Nov 21 14:09:01 mw-server9 haproxy[323]: Server rails_proxy/mon155 is DOWN.
0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:09:01 mw-server9 haproxy[323]: Proxy rails_proxy has no server
available !
Nov 21 14:09:01 mw-server9 haproxy[323]: Server rails_proxy/mon074 is DOWN.
0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:09:01 mw-server9 haproxy[323]: Proxy rails_proxy has no server
available !
Nov 21 14:09:04 mw-server9 haproxy[323]: Server rails_proxy/mon124 is DOWN.
0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:09:04 mw-server9 haproxy[323]: Proxy rails_proxy has no server
available !
Nov 21 14:09:04 mw-server9 haproxy[323]: Server rails_proxy/mon162 is DOWN.
0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:09:04 mw-server9 haproxy[323]: Proxy rails_proxy has no server
available !
Nov 21 14:09:04 mw-server9 haproxy[323]: Server rails_proxy/mon142 is DOWN.
0 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue
Nov 21 14:10:16 mw-server9 haproxy[323]: Server rails_proxy/mon090 is DOWN.
74 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:10:16 mw-server9 haproxy[323]: Server rails_proxy/mon095 is DOWN.
73 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:10:16 mw-server9 haproxy[323]: Server rails_proxy/mon118 is DOWN.
72 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:10:16 mw-server9 haproxy[323]: Server rails_proxy/mon079 is DOWN.
71 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:10:16 mw-server9 haproxy[323]: Server rails_proxy/mon096 is DOWN.
70 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:10:16 mw-server9 haproxy[323]: Server rails_proxy/mon162 is DOWN.
69 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue.
Nov 21 14:10:16 mw-server9 haproxy[323]: Server rails_proxy/mon125 is DOWN.
68 active and 0 backup servers left. 0 sessions active, 0 requeued, 0
remaining in queue
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