Containers API timeout with size parameter

[LotharSee]

The GET /containers/json endpoint timeout when asking for a list of running containers, with the size, while ~10+ containers are running.

How to reproduce

Run some containers:

docker run -d debian sleep infinity

Try to connect to the API with the size=true parameter.

echo -e "GET /containers/json?size=1 HTTP/1.0\r\n" | nc -U /var/run/docker.sock

Wait forever.

If you turn the size=1 to turn size=0, it works.

One thing that could help: docker ps -s is slow with the -s flag. Here is its output:

CONTAINER ID        IMAGE               COMMAND             CREATED              STATUS              PORTS               NAMES                SIZE
6036978bd822        debian:7.4          sleep infinity      About a minute ago   Up 54 seconds                           trusting_lovelace    -1 B
f0029f8157d6        debian:7.4          sleep infinity      About a minute ago   Up 56 seconds                           happy_shockley       -1 B
2254428505b7        debian:7.4          sleep infinity      About a minute ago   Up 58 seconds                           backstabbing_kirch   -1 B
45bfb2a03927        debian:7.4          sleep infinity      About a minute ago   Up About a minute                       hopeful_carson       -1 B
6d8a536ba90d        debian:7.4          sleep infinity      About a minute ago   Up About a minute                       mad_tesla            -1 B
b2602da3b47f        debian:7.4          sleep infinity      About a minute ago   Up About a minute                       romantic_wozniak     -1 B
8535a04c8c03        debian:7.4          sleep infinity      About a minute ago   Up About a minute                       desperate_bartik     -1 B
9c67fd843fa4        debian:7.4          sleep infinity      About a minute ago   Up About a minute                       sharp_fermi          -1 B
b55ea9709120        debian:7.4          sleep infinity      About a minute ago   Up About a minute                       sick_davinci         -1 B
2ec33f19cbb8        debian:7.4          sleep infinity      About a minute ago   Up About a minute                       berserk_hoover       -1 B

System

Tested on a Vagrant box Ubuntu 14.04 Linux vagrant-ubuntu-trusty-64 3.13.0-24-generic.
Tried with 2 versions, installed from sources: Docker version 0.11.1, build fb99f99 and
Docker version 1.0.0, build 63fe64c. Basic setup, just a docker -d.

docker info output with the 1.0.0 version:

Containers: 21
Images: 480
Storage Driver: devicemapper
 Pool Name: docker-8:1-262188-pool
 Data file: /var/lib/docker/devicemapper/devicemapper/data
 Metadata file: /var/lib/docker/devicemapper/devicemapper/metadata
 Data Space Used: 9949.2 Mb
 Data Space Total: 102400.0 Mb
 Metadata Space Used: 18.6 Mb
 Metadata Space Total: 2048.0 Mb
Execution Driver: native-0.2
Kernel Version: 3.13.0-24-generic
WARNING: No swap limit support

[remh]

Nice description of the issue!
Any idea when it will be fixed ?

[jessfraz]

works for me on latest docker

$ curl-unix-socket unix:///var/run/docker.sock:/containers/json?size=1
[{"Command":"irssi","Created":1424885711,"Id":"4387e9537eeed34bfcc86c2280b9605bad61fbcfcbb5332471d404ed2c4093eb","Image":"irssi:latest","Names":["/irssi"],"Ports":[],"SizeRootFs":0,"SizeRw":0,"Status":"Up About an hour"}
]