Incidents/2017-06-01 Maps
Summary
Migration of maps to upload caches resulted in query parameters being stripped, breaking some subservices (task T166735).
Timeline
This is a step by step outline of what happened to cause the incident and how it was remedied.
Conclusions
- There is never enough monitoring.
- An important change was considered ops-only, was never communicated to its product team, neither beforehand for coordination nor afterwards for a quick check that everything still works.
Actionables
Explicit next steps to prevent this from happening again as much as possible, with Phabricator tasks linked for every step.
Done Add geoshapes and geolines to monitoring spec (task T166776)- Done Services need external monitoring (task T167048)
Not done Kartographer should handle external data errors gracefully (task T148883)