{
"in_latency_window": [
{
"address": "b:27017",
"avg_rtt_ms": 5,
"tags": {
"data_center": "nyc",
"rack": "one"
},
"type": "RSSecondary"
}
],
"operation": "read",
"read_preference": {
"mode": "Secondary",
"tag_sets": [
{
"data_center": "nyc",
"rack": "one"
},
{
"other_tag": "doesntexist"
}
]
},
"suitable_servers": [
{
"address": "b:27017",
"avg_rtt_ms": 5,
"tags": {
"data_center": "nyc",
"rack": "one"
},
"type": "RSSecondary"
}
],
"topology_description": {
"servers": [
{
"address": "b:27017",
"avg_rtt_ms": 5,
"tags": {
"data_center": "nyc",
"rack": "one"
},
"type": "RSSecondary"
},
{
"address": "c:27017",
"avg_rtt_ms": 5,
"tags": {
"data_center": "nyc",
"rack": "two"
},
"type": "RSSecondary"
}
],
"type": "ReplicaSetNoPrimary"
}
}