Hi Joe,
On Wed, Jul 21, 2010 at 11:38:21AM -0400, Joe Stein wrote:
> Hi, we have a new server that we are trying to fit behind our existing
> HAProxy implementation. For some reason it is giving us a 502 error (the
> server is a tomcat6 server with servlet) and we are trying to hunt down the
> cause. Any help to what this might be or how we can better interrogate
> haproxy to why it is giving this header (e.g. some header missing or such).
> We are running 1.3.23 in production but have the same issue also on the
> 1.4.8 release too.
If you have enabled the stats socket in the global section, you can
dump the last fault request and response of each backend using "socat" :
printf "show errors\n" | socat stdio unix-connect:/var/run/haproxy.stat
You will get the rejected response and the exact location of the first
faulty character. Most likely you're having a forbidden character in a
header name, I've seen that once.
Regards,
Willy
