Major - P3 With mongodump-2.4, this works:
$ mongodump-2.4 -d "admin" -c "system.users" connected to: 127.0.0.1 Tue Feb 25 13:53:12.167 DATABASE: admin to dump/admin Tue Feb 25 13:53:12.167 admin.system.users to dump/admin/system.users.bson Tue Feb 25 13:53:12.168 1 objects Tue Feb 25 13:53:12.168 Metadata for admin.system.users to dump/admin/system.users.metadata.json $
but doing the same thing, against the same db, with 2.6rc0 mongodump writes no output file:
$ mongodump-2.6 -d "admin" -c "system.users" connected to: 127.0.0.1 2014-02-25T13:54:36.635-0500 DATABASE: admin to dump/admin $
however, it looks like other collections (system.roles, system.version, etc) do get dumped as expected.
We need to be able to dump system.users in order to complete the multi-tenant user dump/restore process outlined in Matt's comment on QA-404: