C++ driver failing to connect as user admin

[Jeff Abrahamson]

I'm using the C++ (releases/stable as of this morning) driver.  I write this:

    mongocxx::instance instance{};
    mongocxx::uri uri("mongodb://my_user:password@localhost:27017/?ssl=true");

    mongocxx::options::client client_options;
    mongocxx::options::ssl ssl_options;
    ssl_options.allow_invalid_certificates(true);
    client_options.ssl_opts(ssl_options);
    mongocxx::client client(uri, client_options);
    mongocxx::database db = client["my_database"];

    mongocxx::collection spines = db["spines"];

    {
        mongocxx::cursor cursor = spines.find(document{} << finalize);
        cout << "This happens." << endl;
        for (auto doc : cursor) {
            cout << "This doesn't happen." << endl;
            cout << bsoncxx::to_json(doc) << endl;
        }
    }

Somewhere between the two comments ("this happens" and "this doesn't happen"), the program crashes with this message:

terminate called after throwing an instance of 'mongocxx::v_noabi::query_exception'
  what():  auth failed: generic server error
Aborted (core dumped)

and the mongo log shows this:

2017-11-16T17:51:34.957+0000 [initandlisten] connection accepted from 1.2.3.4:42196 #1430800 (27 connections now open)
2017-11-16T17:51:35.420+0000 [conn1430800]  authenticate db: admin { authenticate: 1, user: "my_user", nonce: "xxx", key: "xxx" }
2017-11-16T17:51:35.421+0000 [conn1430800] Failed to authenticate my_database@admin with mechanism MONGODB-CR: AuthenticationFailed UserNotFound Could not find user my_database@admin
2017-11-16T17:51:35.528+0000 [conn1430800] end connection 1.2.3.4:42196 (26 connections now open)

Those credentials work from the commandline client.

I'm pretty confused why I'm seeing this error about admin.  Anyone see what I'm missing?

Jeff Abrahamson
+33 6 24 40 01 57

+44 7920 594 255

je...@purple.com -> je...@p27.eu

http://p27.eu/jeff/
http://blog.purple.com/jeff/

[Jeff Abrahamson]

Answer is to include the database in the uri string as well:

    mongocxx::uri uri("mongodb://my_user:password@localhost:27017/my_database?ssl=true");

Jeff Abrahamson
https://www.p27.eu/jeff/

[Andrew Morrow]

Hi Jeff -

I'm happy to hear that you got it working. Also, please be aware that we anticipate issuing the MongoDB C++ driver 3.2.0-rc0 release very shortly, so that releases/stable branch will include some new features soon.

Thanks,

Andrew

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