Empty results (no document) on all queries

Hello there,

I am trying to narrown down on an issue we have with our community Haskell driver (https://github.com/mongodb-haskell/mongodb/issues/131).

Put simply the problem is that overnight production code written for this driver started to fail massively without errors. The issue is that even though we are able to:

  • connect
  • authenticate
  • read partial values
    we are not able to:
  • return documents

In other words, all function calls whose return values are list/array/collection of documents come out empty.

Any idea what server/api change could be the culprit? I am kind pulling my hair on this one as I have no error message to work with. I should be inspecting the bytestrings from MongoDB Atlas but didn’t have time to do this yet.