[Bug 1088125] New: docker top stopped working, cgroup path changed

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1088125

            Bug ID: 1088125
           Summary: docker top stopped working, cgroup path changed
           Product: Fedora
           Version: 20
         Component: docker-io
          Severity: high
          Assignee: lsm5(a)redhat.com
          Reporter: ldoktor(a)redhat.com
        QA Contact: extras-qa(a)fedoraproject.org
                CC: admiller(a)redhat.com, golang(a)lists.fedoraproject.org,
                    lsm5(a)redhat.com, mattdm(a)redhat.com,
                    mgoldman(a)redhat.com, skottler(a)redhat.com,
                    vbatts(a)redhat.com



Description of problem:
The `docker top` command stopped working, the path to cgroup processes had
changed.


Version-Release number of selected component (if applicable):
docker-io-0.10.0-2.fc20.x86_64

How reproducible:
always

Steps to Reproduce:
1. docker run -i fedora bash
2. docker top $NAME

Actual results:
[root@t530 ~]# docker top determined_jones 
2014/04/16 07:47:52 Error: open
/sys/fs/cgroup/devices/system.slice/docker/93dfbd4d375cf026df215d87b5d93de8b0a9bd55094e33c2ca3322cd6afb53f1/tasks:
no such file or directory

Expected results:
list of processes...

Additional info:
[root@t530 ~]# ls /sys/fs/cgroup/devices/system.slice/
cgroup.clone_children
cgroup.event_control
cgroup.procs
devices.allow
devices.deny
devices.list
docker-93dfbd4d375cf026df215d87b5d93de8b0a9bd55094e33c2ca3322cd6afb53f1.scope
notify_on_release
tasks

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