Mongo server log has a lot of '"ctx":"listener","msg":"Error accepting new connection"'

The mongod is running and could accept new client connection, but its log is full of the messages like

{"t":{"$date":"2024-01-17T06:46:54.158+00:00"},"s":"W", "c":"NETWORK", "id":5746600, "ctx":"listener","msg":"Error accepting new connection","attr":{"error":"Transport endpoint is not connected"}}

The server version is 6.0.3, and deployed in K8S.