{
"in_latency_window": [],
"operation": "read",
"read_preference": {
"mode": "Nearest",
"tag_sets": [
{
"data_center": "sf"
}
]
},
"suitable_servers": [],
"topology_description": {
"servers": [
{
"address": "b:27017",
"avg_rtt_ms": 5,
"tags": {
"data_center": "nyc"
},
"type": "RSSecondary"
},
{
"address": "c:27017",
"avg_rtt_ms": 100,
"tags": {
"data_center": "nyc"
},
"type": "RSSecondary"
}
],
"type": "ReplicaSetNoPrimary"
}
}