use noop resolver in network by default

network/mucp/mucp.go

@@ -431,7 +431,7 @@ func (n *mucpNetwork) resolveNodes() ([]string, error) {
 	}
 
 	// sort by lowest priority
-	if err == nil {
+	if err == nil && len(records) > 0 {
 		sort.Slice(records, func(i, j int) bool { return records[i].Priority < records[j].Priority })
 	}
 

network/options.go

@@ -3,7 +3,7 @@ package network
 import (
 	"github.com/google/uuid"
 	"github.com/micro/go-micro/v3/network/resolver"
-	"github.com/micro/go-micro/v3/network/resolver/registry"
+	"github.com/micro/go-micro/v3/network/resolver/noop"
 	"github.com/micro/go-micro/v3/proxy"
 	"github.com/micro/go-micro/v3/proxy/mucp"
 	"github.com/micro/go-micro/v3/router"
@@ -107,6 +107,6 @@ func DefaultOptions() Options {
 		Tunnel:   tunnel.NewTunnel(),
 		Router:   regRouter.NewRouter(),
 		Proxy:    mucp.NewProxy(),
-		Resolver: &registry.Resolver{},
+		Resolver: new(noop.Resolver),
 	}
 }

network/resolver/noop/noop.go

@@ -0,0 +1,13 @@
+// Package noop is a noop resolver
+package noop
+
+import (
+	"github.com/micro/go-micro/v3/network/resolver"
+)
+
+type Resolver struct{}
+
+// Resolve returns the list of nodes
+func (r *Resolver) Resolve(name string) ([]*resolver.Record, error) {
+	return []*resolver.Record{}, nil
+}

network/resolver/static/static.go

@@ -1,5 +1,5 @@
 // Package static is a static resolver
-package registry
+package static
 
 import (
 	"github.com/micro/go-micro/v3/network/resolver"