1# maxStalenessSeconds must be at least 90 seconds, even with no known servers. 2--- 3topology_description: 4 type: ReplicaSetNoPrimary 5 servers: 6 - &1 7 address: a:27017 8 type: Unknown 9 - &2 10 address: b:27017 11 type: Unknown 12read_preference: 13 mode: Nearest 14 maxStalenessSeconds: 1 # Too small. 15error: true