N-to-N connections through LB

Working with Data Drivers
,
1

Hello, I am learning to build web app architecture using k8s’ ReplicaSet but without MongoDB’s replicaSet nor mongos.

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This works okay until I closed one client while stress test. Other client will sometimes receive these errors

{
    "type": "MongoNetworkError",
    "msg": "connection 967 to REDACTED  closed"
  },{
    "type": "PoolClearedError",
    "msg": "Connection pool for REDACTED was cleared because another operation failed with: \"connection 967 to REDACTED  closed"\""
  }

My hunch is both clients and drivers can’t differentiate one to another as they come from same hostname without any DNS resolver evolved. I’ve also explored some options such as loadBalanced=true but the driver won’t support it. Please tell me if there are any solution or this architecture shouldn’t exist at all. Thanks!

EDIT:
is loadBalanced option only works on mongos? Load balancing mongos - Working with Data / Drivers - MongoDB Developer Community Forums