The tag #flickr2commons is accruing quite a large set of data (230,000 edits in 2.5 months). The query now takes a long time to evaluate, including today when a worker fully timed out, resulting in a 502 error.
This is a broad issue with many potential steps to take, including:
- Evaluating which db calls are being made and how expensive they are
- Taking steps to optimise the database
- Considering whether to restrict #flickr2commons edits
- Investigating worker timeouts (could we just increase the time before they time out for now?)