fix(resolver): filter out nodes with weight 0

transport/grpc/resolver/discovery/resolver.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"strconv"
 	"time"
 
 	"google.golang.org/grpc/attributes"
@@ -66,6 +67,12 @@ func (r *discoveryResolver) update(ins []*registry.ServiceInstance) {
 		if _, ok := endpoints[ept]; ok {
 			continue
 		}
+		// filter weight <= 0
+		if w, ok := in.Metadata["weight"]; ok {
+			if i, err := strconv.ParseInt(w, 10, 64); err == nil && i <= 0 {
+				continue
+			}
+		}
 		filtered = append(filtered, in)
 	}
 	if r.subsetSize != 0 {

transport/http/resolver.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"net/url"
+	"strconv"
 	"strings"
 	"time"
 
@@ -130,6 +131,12 @@ func (r *resolver) update(services []*registry.ServiceInstance) bool {
 		if ept == "" {
 			continue
 		}
+		// filter weight <= 0
+		if w, ok := ins.Metadata["weight"]; ok {
+			if i, err := strconv.ParseInt(w, 10, 64); err == nil && i <= 0 {
+				continue
+			}
+		}
 		filtered = append(filtered, ins)
 	}
 	if r.subsetSize != 0 {