Compatibility between Eventlet and modern versions of CPython is broken. Leadings Openstack to critical runtime problems https://lists.openstack.org/archives/list/openstack-discuss@lists.openstack.org/thread/YO5CZDVAJ6QSF734ALWSGNOQDDAIOXKI/#RZFUTBFTUCSHKVA6SOCWWIXEH3QJHMYT.

CPython is maintained by thousand of maintainers. Eventlet who aims to monkey patch significant parts of the CPython standard library, is maintained by 2 persons. The compatibility between them is already broken since years ago, and this become a critical, and not recoverable problem. The gap is to wide and we don't have the resources to fix that.

This epic aims to serve as an entry point to plan the migration and hence tracking its advancement.