Istio pilot proxy status conflict inbound listener

1

Hi, I am new to istio. I am trying to connect a grpc service pod using Envoy filter. I am getting following error
grpc-message: upstream connect error or disconnect/reset before headers. reset reason: connection termination
From istio pilot pod log I see following problem

"ProxyStatus": {
        "pilot_conflict_inbound_listener": {
            "api-64c5d7869c-tkx2f.default": {
                "proxy": "api-64c5d7869c-tkx2f.default",
                "message": "Conflicting inbound listener:10.52.0.29:8000. existing: api.default.svc.cluster.local, incoming: api.default.svc.cluster.local"
            }
        },
        "pilot_conflict_outbound_listener_http_over_current_tcp": {
            "0.0.0.0:443": {
                "proxy": "api-64c5d7869c-tkx2f.default",
                "message": "Listener=0.0.0.0:443 AcceptedHTTP=api.default.svc.cluster.local RejectedTCP=*.googleapis.com HTTPServices=1"
            }
        }
    },

Why it may cause? Thanks