MapR Drill - mongodb collections does not show up

[Rangaswamy, Manoharan]

We are using MapR Drill 1.0 and configured a mongodb storage plugin as below.

{
  "type": "mongo",
  "connection": "mongodb://uid:pwd@host:port/dbname",
  "enabled": true
}

We are able to connect through CLI and Drill Explorer, but it does display any 
databases and query against any collection fail as well.

Robomongo connects well with the same user and it works.

Are we missing any additional configuration? Please let us know.

Thanks,
Mano