With ores-prod-deploy commit 97a1d80d20a0a4b9794bfdda28e96a96aeb94b1d, we're seeing a freak revscoring 1 error. While importing the arwiki_revert model during startup, the process fails with:
Adding logging, I can show that this error happens when loading the first model, arwiki_reverted. That model can be loaded from the python interpreter using Model.load without issues.
The only discrepancy is that the config file still has scorer_models.defaults.class set to revscoring.scorer_models.MLScorerModel, which doesn't exist in revscoring 2. Is the default class coming into play, and why?