unable to test http with haproxy

[gbjtv]

I'm trying to use wrk to benchmark haproxy. I'm unable to get wrk to successfully run when http keepalives are enabled to backend servers (default behavior in haproxy 1.5) . I have to set "option http-server-close" in the backend section to get around this. Any ideas why wrk is failing when keepalives are enabled? It looks like each thread can make the first http request and get a response but stop sending any more requests.

[wg]

Hi @gbjtv, communication between haproxy and the backend HTTP server doesn't involve wrk, does it? I'm not sure how anything wrk does could affect that part of the pipeline.

[gbjtv]

This is how I am able to replicate.

• Use https://cloud-images.ubuntu.com/vagrant/precise/current/precise-server-cloudimg-amd64-vagrant-disk1.box
• sudo apt-get install nginx libssl-dev zlib1g-dev
• compile haproxy 1.5 (we're using 1.5.14) using make TARGET=linux2628 USE_PCRE=1 USE_TFO=1 USE_OPENSSL=1 USE_ZLIB=1
• mkdir -p /dev/shm/service/logs/
• use this nginx config: https://gist.github.com/gbjtv/a5dcb3fe8e0e22f87fac
• start nginx: sudo /usr/sbin/nginx -c nginx.conf -p /dev/shm/service
• use this haproxy config: https://gist.github.com/gbjtv/d107951cc0c1cef539c9
• start haproxy: `/usr/local/sbin/haproxy -f haproxy.conf``
• generate a 2k file: base64 /dev/urandom | head -c 2048 > /dev/shm/service/2k
• git clone https://github.com/wg/wrk.git
• cd wrk ; make

At this point I run ~/wrk/wrk -c 10 -d 10s -t 10 against

• http://localhost:9080/2k
• http://localhost:9081/2k
• http://localhost:9082/2k
• http://localhost:9083/2k
• http://localhost:9084/2k

I experience the issue when running against port 9080-9082. wrk seems to hang after the first requests from each thread * connections.

Everything seems to work normally for port 9083 and 9084 which have the http-server-close option set.