error getting database names

[dan335]

I'm getting this error.

Failed: error getting database names: not authorized on admin to execute command { listDatabases: 1 }

Tried using users with "backup" role and "root" role. Logging in through the shell and doing "show dbs" works fine. Mongodb 3.2.

[fresheneesz]

I got this when migrating to mongo 3 while still using the old mongo.conf format. Switching to the new format fixed it.