If a node in a replica set is marked as "RECOVERING" it is not marked as a secondary in the isMaster.

This might break the drivers, but theoretically, it should display itself as a secondary because only a secondary can recover.

E.g.

"isMaster":

{ "hosts": [ "server1.cc:27018", "server2:27018", "server3:27018" ], "ismaster": false, "maxBsonObjectSize": 16777216, "ok": 1, "primary": "server1:27018", "secondary": false, "setName": "myset" }