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Upstream support for MySQL 5.7 ends in October 2023. Django 4.2 supports MySQL 8 and higher. Changelog
SRE team is currently working to resolve this blocker. Devstack and Sandbox are already running with MySQL8 now.
You can reach out to the SRE team for upgrading your service from MySQL57 to MySQL8 on stage and production along with the upgrade work.
PyMemCacheBackend MemcachedCache Removal
The django.core.cache.backends.memcached.MemcachedCache backend is removed.
See the Changelog for details.
See the issue for details and all the efforts made to resolve this issue in edx-platform.
Some PRs would also be needed in edx-internal and sandbox-internal to update respective configurations.
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