Haproxy shows status code in log file (-1)

Question

I have a strange status code in my haproxy log file (note that its not configured log format has a default value of log-http)

43.56.77.23:55309 [27/Oct/2015:20:14:34.749] front-http mybackend/app 349/0/-1/-1/359 **-1** 0 - - CC-- 1658/1658/21/21/0 0/0 "GET /img/button_bkg.png HTTP/1.1"

What is the status code -1, I tried to find a solution on the Internet, but, unfortunately, I could not find anything that would fit my problem.

Does anyone know what this status code means?

Answer 1

-1 indicates that the status code is unavailable. The reason is in the field termination flags.

See section 8.5 in the docs .