[Bug 1189028] New: docker 1.4.1-3.el6 fd leak

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1189028

Bug ID: 1189028
           Summary: docker 1.4.1-3.el6 fd leak
           Product: Fedora EPEL
           Version: el6
         Component: docker-io
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail], [e-mail], [e-mail],
                    [e-mail], [e-mail]

Description of problem:

docker daemon doesn't close file descriptor.

Version-Release number of selected component (if applicable):
 docker-io-1.4.1-3.el6.x86_64

How reproducible:

Steps to Reproduce:
1. while true; do docker run -t -i --rm busybox /bin/true ; done
2. (in other terminal) DEBUG=1 docker info
3. check values at Fds: and Goroutines: lines

Actual results:
 Fds and Goroutines values are increased forever

Expected results:

Additional info:

- It doesn't happen on RHEL7 + docker 1.4.1
- It doesn't happen on RHEL6 + docker-io-1.3.2-2.el6.x86_64

# lsof -p $(pidof docker)
<snip>
docker  7771 root   14u   REG                0,9        0   3791 [eventfd]
docker  7771 root   15u   REG                0,9        0   3791 [eventfd]
docker  7771 root   16r   REG               0,21        0  20709
/cgroup/memory/docker/98b529e398bec4568c58ea96088aef1535eca504bed6453bab8f6f7803d31cfb/memory.oom_control
(deleted)
docker  7771 root   17u   REG                0,9        0   3791 [eventfd]
docker  7771 root   18r   REG               0,21        0  21176
/cgroup/memory/docker/bc213d3e80815021780064874665fe80801c5a1010d1c0bc4bd5b118ca45d11f/memory.oom_control
(deleted)
docker  7771 root   19u   REG                0,9        0   3791 [eventfd]
docker  7771 root   20r   REG               0,21        0  21626
/cgroup/memory/docker/7b8d59ec4f23c14e2732726594460ccf89fe31c06e60fabbdc4e358f794af102/memory.oom_control
(deleted)
docker  7771 root   21w   REG                0,9        0   3791 [eventfd]
docker  7771 root   22r   REG               0,21        0  22112
/cgroup/memory/docker/99ac44fcb18a3e1aea00a5e7cfb040942f2c4f2c673c291105c367788e49d0f2/memory.oom_control
(deleted)
docker  7771 root   24r   REG               0,21        0  22672
/cgroup/memory/docker/b1804ae48289df81d3a5c54167baf729612e12c552ef98917df90d8645d235ad/memory.oom_control
(deleted)
<snip>

# ps $(pidof docker) m
  PID TTY      STAT   TIME COMMAND
 7771 pts/0    -      0:09 /usr/bin/docker -d
    - -        Sl     0:02 -
    - -        Sl     0:00 -
    - -        Sl     0:00 -
    - -        Sl     0:00 -
    - -        Sl     0:00 -
    - -        Sl     0:00 -
    - -        Sl     0:00 -
    - -        Sl     0:01 -
    - -        Sl     0:00 -
<snip>