The current implementation of `MongoSourceTask::tryCreateCursor` ends with

if (resumeTokenNotFound(e)) {
      throw new ConnectException(
          "ResumeToken not found. Cannot create a change stream cursor", e);
    }
  }
  return null;
}

In the event that the cursor was not able to be created for a reason other than the "resume token not found" error, the connector does not fail and instead starts and processes no messages.