diff --git a/client/resource_manager_client.go b/client/resource_manager_client.go
index 9a394c7a503..90cfc977acf 100644
--- a/client/resource_manager_client.go
+++ b/client/resource_manager_client.go
@@ -36,6 +36,8 @@ const (
 	groupSettingsPathPrefix            = "resource_group/settings"
 	// errNotPrimary is returned when the requested server is not primary.
 	errNotPrimary = "not primary"
+	// errNotLeader is returned when the requested server is not pd leader.
+	errNotLeader = "not leader"
 )
 
 // ResourceManagerClient manages resource group info and token request.
@@ -60,7 +62,7 @@ func (c *client) resourceManagerClient() (rmpb.ResourceManagerClient, error) {
 
 // gRPCErrorHandler is used to handle the gRPC error returned by the resource manager service.
 func (c *client) gRPCErrorHandler(err error) {
-	if strings.Contains(err.Error(), errNotPrimary) {
+	if strings.Contains(err.Error(), errNotPrimary) || strings.Contains(err.Error(), errNotLeader) {
 		c.pdSvcDiscovery.ScheduleCheckMemberChanged()
 	}
 }
diff --git a/pkg/mcs/resource_manager/server/manager.go b/pkg/mcs/resource_manager/server/manager.go
index b9c9b37c7d9..a884b064292 100644
--- a/pkg/mcs/resource_manager/server/manager.go
+++ b/pkg/mcs/resource_manager/server/manager.go
@@ -126,23 +126,26 @@ func (m *Manager) Init(ctx context.Context) {
 	}
 	m.storage.LoadResourceGroupStates(tokenHandler)
 
-	// Add default group
-	defaultGroup := &ResourceGroup{
-		Name: reservedDefaultGroupName,
-		Mode: rmpb.GroupMode_RUMode,
-		RUSettings: &RequestUnitSettings{
-			RU: &GroupTokenBucket{
-				Settings: &rmpb.TokenLimitSettings{
-					FillRate:   math.MaxInt32,
-					BurstLimit: -1,
+	// Add default group if it's not inited.
+	if _, ok := m.groups[reservedDefaultGroupName]; !ok {
+		defaultGroup := &ResourceGroup{
+			Name: reservedDefaultGroupName,
+			Mode: rmpb.GroupMode_RUMode,
+			RUSettings: &RequestUnitSettings{
+				RU: &GroupTokenBucket{
+					Settings: &rmpb.TokenLimitSettings{
+						FillRate:   math.MaxInt32,
+						BurstLimit: -1,
+					},
 				},
 			},
-		},
-		Priority: middlePriority,
-	}
-	if err := m.AddResourceGroup(defaultGroup.IntoProtoResourceGroup()); err != nil {
-		log.Warn("init default group failed", zap.Error(err))
+			Priority: middlePriority,
+		}
+		if err := m.AddResourceGroup(defaultGroup.IntoProtoResourceGroup()); err != nil {
+			log.Warn("init default group failed", zap.Error(err))
+		}
 	}
+
 	// Start the background metrics flusher.
 	go m.backgroundMetricsFlush(ctx)
 	go func() {
diff --git a/tests/integrations/mcs/resource_manager/resource_manager_test.go b/tests/integrations/mcs/resource_manager/resource_manager_test.go
index 634c919e437..6dcc5dd6430 100644
--- a/tests/integrations/mcs/resource_manager/resource_manager_test.go
+++ b/tests/integrations/mcs/resource_manager/resource_manager_test.go
@@ -699,6 +699,19 @@ func (suite *resourceManagerClientTestSuite) TestBasicResourceGroupCURD() {
 				}
 			},
 		},
+		{"default", rmpb.GroupMode_RUMode, false, true,
+			`{"name":"default","mode":1,"r_u_settings":{"r_u":{"settings":{"fill_rate":10000,"burst_limit":-1},"state":{"initialized":false}}},"priority":0}`,
+			func(gs *rmpb.ResourceGroup) {
+				gs.RUSettings = &rmpb.GroupRequestUnitSettings{
+					RU: &rmpb.TokenBucket{
+						Settings: &rmpb.TokenLimitSettings{
+							FillRate:   10000,
+							BurstLimit: -1,
+						},
+					},
+				}
+			},
+		},
 	}
 
 	checkErr := func(err error, success bool) {
@@ -865,6 +878,25 @@ func (suite *resourceManagerClientTestSuite) TestBasicResourceGroupCURD() {
 			re.Equal(1, len(groups1))
 		}
 	}
+
+	// test restart cluster
+	groups, err := cli.ListResourceGroups(suite.ctx)
+	re.NoError(err)
+	servers := suite.cluster.GetServers()
+	re.NoError(suite.cluster.StopAll())
+	serverList := make([]*tests.TestServer, 0, len(servers))
+	for _, s := range servers {
+		serverList = append(serverList, s)
+	}
+	re.NoError(suite.cluster.RunServers(serverList))
+	suite.cluster.WaitLeader()
+	var newGroups []*rmpb.ResourceGroup
+	testutil.Eventually(suite.Require(), func() bool {
+		var err error
+		newGroups, err = cli.ListResourceGroups(suite.ctx)
+		return err == nil
+	}, testutil.WithWaitFor(time.Second))
+	re.Equal(groups, newGroups)
 }
 
 func (suite *resourceManagerClientTestSuite) TestResourceManagerClientFailover() {