fix/return err (#2763)

* fix:set url to nil when destroy base invoker and change the order of related references to avoid panic

* fix err return which issued in issue2762

config/tls_config.go

@@ -20,6 +20,7 @@ package config
 import (
 	"crypto/tls"
 	"crypto/x509"
+	"errors"
 	"os"
 )
 
@@ -55,7 +56,7 @@ func GetServerTlsConfig(opt *TLSConfig) (*tls.Config, error) {
 			return nil, err
 		}
 		if ok := ca.AppendCertsFromPEM(caBytes); !ok {
-			return nil, err
+			return nil, errors.New("failed to parse root certificate")
 		}
 		cfg.ClientAuth = tls.RequireAndVerifyClientCert
 		cfg.ClientCAs = ca
@@ -85,7 +86,7 @@ func GetClientTlsConfig(opt *TLSConfig) (*tls.Config, error) {
 		return nil, err
 	}
 	if ok := ca.AppendCertsFromPEM(caBytes); !ok {
-		return nil, err
+		return nil, errors.New("failed to parse root certificate")
 	}
 	cfg.RootCAs = ca
 	//need mTls

global/registry_config.go

@@ -17,12 +17,13 @@
 
 package global
 
-import "strconv"
+import (
+	"strconv"
+)
 
 // todo(DMwangnima): finish refactoring and move related logic from config package to this file.
 // This RegistryConfig is a copy of /config/RegistryConfig right now.
 // Please refer to issue(https://github.com/apache/dubbo-go/issues/2377).
-
 // RegistryConfig is the configuration of the registry center
 type RegistryConfig struct {
 	Protocol          string            `validate:"required" yaml:"protocol"  json:"protocol,omitempty" property:"protocol"`

protocol/triple/internal/client/common/client.go

@@ -65,7 +65,7 @@ func testBidiStream(cli greettriple.GreetService) error {
 		return err
 	}
 	if sendErr := stream.Send(&greet.GreetStreamRequest{Name: "triple"}); sendErr != nil {
-		return err
+		return sendErr
 	}
 	resp, err := stream.Recv()
 	if err != nil {
@@ -89,7 +89,7 @@ func testClientStream(cli greettriple.GreetService) error {
 	}
 	for i := 0; i < 5; i++ {
 		if sendErr := stream.Send(&greet.GreetClientStreamRequest{Name: "triple"}); sendErr != nil {
-			return err
+			return sendErr
 		}
 	}
 	resp, err := stream.CloseAndRecv()