Right now, it's possible to depool/remove a node from the full sync list but leave it in the proxy/canary list. This is bad and will only lead to heartache.
- Group Reviewers
- rMSCA5e10385473d2: Defend against old proxies/canaries being defined
- Patch without arc
- git checkout -b D530 && curl -L https://phabricator.wikimedia.org/D530?download=true | git apply
Untested so far, felt like the right thing to do