Currently, import/export tools (mongoimport, mongoexport, mongodump, and mongorestore) called with the --quiet option also suppresses all error messages. For example:

$ mongoimport -d test -c test --host <unreachable host> test.json
2017-03-30T11:00:46.287+1100	Failed: error connecting to db server: no reachable servers

$ mongoimport -d test -c test --host <unreachable host> --quiet test.json
(no error message printed to the console)

As a result, if a user runs the import/export tools from the console, it could fail silently without notifying the user.