The documentation for the Hive part of the Hadoop Connector states that the administrator should use connection string as the format for the value of the "mongo.uri" property. But the "/database" component of the connection needs to be a namespace, which is <database>.<collection>, not just a database name.

Furthermore, I understand that Java driver in general requires that the "/database" component be a namespace too, implying that the "mongo.input.uri" and "mongo.output.uri" also require a namespace value in the database component.