https://review.openstack.org/#/c/10823/ 0.9.17 was released 2012-08-03 and includes two particular fixes related to OpenStack 1. https://bitbucket.org/which_linden/eventlet/issue/123/ Fix an exception thrown by epoll in certain cases. This can cause jenkins to deadlock, triggered for example by: https://review.openstack.org/#/c/10767/ 2. https://bitbucket.org/which_linden/eventlet/issue/115/ https://bugs.launchpad.net/nova/+bug/903199 Fix a significant memory leak of _DummyThread objects. cheers, Pádraig.