[openstack-dev] Issue with eventlet monkey patching

Brian Rosmaita rosmaita.fossdev at gmail.com
Thu Jan 25 22:47:51 UTC 2018

Thanks Slawek, this indeed looks like the problem we are having with
Glance.  Searchlight, too.

On Thu, Jan 25, 2018 at 10:53 AM, Sławomir Kapłoński
<slawek at kaplonski.pl> wrote:
> Hi,
> Recently we found in Neutron errors with starting our agents which uses eventlet.monkey_patch() method. Bug is described in [1].
> I heard on IRC that it's not related only to Neutron so here is what we found about that.
> It looks that this issue happens on Ubuntu with python2.7 2.7.12-1ubuntu0~16.04.3 with eventlet < 0.22.0 (in OpenStack requirements it is set to 0.20.0).
> There is no this issue with python2.7.12-1ubuntu0~16.04.2 and eventlet 0.20.0
> Something similar was already reported for monotonic in [2]. From one of comments there we found that problem can be caused because:
> "ctypes.util.find_library is now using subprocess.Popen, instead of os.popen (python/cpython at eb063011), and eventlet monkey-patches subprocess.Popen but not os.popen."
> It looks that eventlet patch [3] fixes/workaround this issue.
> I pushed similar patch to Neutron [4] and it looks that our issue is solved for now.
> I hope that maybe this info will be helpful for You :)
> [1] https://bugs.launchpad.net/neutron/+bug/1745013
> [2] https://www.bountysource.com/issues/43892421-new-monotonic-broken-on-docker
> [3] https://github.comhttps://review.openstack.org/#/c/537863/1/eventlet/eventlet/commit/b756447bab51046dfc6f1e0e299cc997ab343701
> [4] https://review.openstack.org/#/c/537863
>> Best regards
> Slawek Kaplonski
> slawek at kaplonski.pl
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