Comment 3 for bug 1585131

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Inessa Vasilevskaya (ivasilevskaya) wrote :

That's the reason - https://review.openstack.org/#/c/257204/6.
The close is performed in 2 eventlet threads with the applications being uninstantiated twice (see ryu's lib code https://github.com/osrg/ryu/blob/master/ryu/base/app_manager.py#L544)