Retr Warnings and Socket Issues

I have a few questions I would like to pose to the HAProxy list.

First, is there a listing in the documentation as to what exactly triggers the various Warnings and Errors that come up in the stats output? When one of these conditions occur, does it come up in the haproxy logs? I am seeing a lot of retry warnings on 3 out of 5 servers defined in one of my backends (the numbers tend to keep increasing on every reload).

Also, I've noticed that at times of high usage, the number of active connections between the backend servers is uneven by a large margin. The servers that run linux seem to end up with hgher numbers than machines with freebsd installed on it. Could this have something to due with socket issues on the backend servers? Anyway to go about debugging this?

• james