Comment 0 for bug 1567668

Here's an example:
http://logs.openstack.org/13/302913/1/check/gate-neutron-dsvm-functional/91dd537/console.html

Logstash query:
build_name:"gate-neutron-dsvm-functional" AND build_status:"FAILURE" AND message:"Killed timeout -s 9"

45 hits in the last 7 days.

Ihar and I checked the timing, and it started happening as we merged: https://review.openstack.org/#/c/298056/

There's a few problems here:
1) It appears like a test is freezing up. We have a per-test timeout defined. The timeout is defined by OS_TEST_TIMEOUT in tox.ini, and is enforced via a fixtures.Timeout fixture set up in the oslotest base class. It looks like that timeout doesn't always work.
2) When the global 2 hours job timeout is hit, it doesn't perform post-tests tasks such as copying over log files, which makes these problems a lot harder to troubleshoot.
3) And of course, there is some sort of issue with likely https://review.openstack.org/#/c/298056/.

We can fix via a revert, which will increase the failure rate of fullstack. Since I've been unable to reproduce this issue locally, I'd like to hold off on a revert and try to get some more information by tackling some combination of problems 1 and 2, and then adding more logging to figure it out.