diff --git a/internal/datacoord/server.go b/internal/datacoord/server.go
index 53c52a63f0..98fe6ec988 100644
--- a/internal/datacoord/server.go
+++ b/internal/datacoord/server.go
@@ -282,7 +282,6 @@ func (s *Server) initSession() error {
 // Init change server state to Initializing
 func (s *Server) Init() error {
 	var err error
-	s.stateCode.Store(commonpb.StateCode_Initializing)
 	s.factory.Init(Params)
 	if err = s.initSession(); err != nil {
 		return err
@@ -295,7 +294,6 @@ func (s *Server) Init() error {
 				return err
 			}
 			s.startDataCoord()
-			s.stateCode.Store(commonpb.StateCode_Healthy)
 			log.Info("DataCoord startup success")
 			return nil
 		}
@@ -308,6 +306,7 @@ func (s *Server) Init() error {
 }
 
 func (s *Server) initDataCoord() error {
+	s.stateCode.Store(commonpb.StateCode_Initializing)
 	var err error
 	if err = s.initRootCoordClient(); err != nil {
 		return err
@@ -363,7 +362,6 @@ func (s *Server) initDataCoord() error {
 func (s *Server) Start() error {
 	if !s.enableActiveStandBy {
 		s.startDataCoord()
-		s.stateCode.Store(commonpb.StateCode_Healthy)
 		log.Info("DataCoord startup successfully")
 	}
 
@@ -382,6 +380,7 @@ func (s *Server) startDataCoord() {
 	// data while offline.
 	log.Info("DataCoord (re)starts successfully and re-collecting segment stats from DataNodes")
 	s.reCollectSegmentStats(s.ctx)
+	s.stateCode.Store(commonpb.StateCode_Healthy)
 }
 
 func (s *Server) initCluster() error {
diff --git a/internal/datacoord/server_test.go b/internal/datacoord/server_test.go
index 9610ac3355..2f901939c6 100644
--- a/internal/datacoord/server_test.go
+++ b/internal/datacoord/server_test.go
@@ -3549,10 +3549,16 @@ func newTestServer(t *testing.T, receiveCh chan any, opts ...Option) *Server {
 
 	err = svr.Init()
 	assert.Nil(t, err)
-	err = svr.Start()
-	assert.Nil(t, err)
+	if Params.DataCoordCfg.EnableActiveStandby.GetAsBool() {
+		assert.Equal(t, commonpb.StateCode_StandBy, svr.stateCode.Load().(commonpb.StateCode))
+	} else {
+		assert.Equal(t, commonpb.StateCode_Initializing, svr.stateCode.Load().(commonpb.StateCode))
+	}
 	err = svr.Register()
 	assert.Nil(t, err)
+	err = svr.Start()
+	assert.Nil(t, err)
+	assert.Equal(t, commonpb.StateCode_Healthy, svr.stateCode.Load().(commonpb.StateCode))
 
 	// Stop channal watch state watcher in tests
 	if svr.channelManager != nil && svr.channelManager.stopChecker != nil {
diff --git a/internal/distributed/querycoord/service.go b/internal/distributed/querycoord/service.go
index a3e7e3dafc..87f1eb2795 100644
--- a/internal/distributed/querycoord/service.go
+++ b/internal/distributed/querycoord/service.go
@@ -188,8 +188,6 @@ func (s *Server) init() error {
 	}
 	log.Debug("QueryCoord report DataCoord ready")
 
-	s.queryCoord.UpdateStateCode(commonpb.StateCode_Initializing)
-	log.Debug("QueryCoord", zap.Any("State", commonpb.StateCode_Initializing))
 	if err := s.queryCoord.Init(); err != nil {
 		return err
 	}
diff --git a/internal/distributed/rootcoord/service.go b/internal/distributed/rootcoord/service.go
index ef01c5ba9d..63b53d8068 100644
--- a/internal/distributed/rootcoord/service.go
+++ b/internal/distributed/rootcoord/service.go
@@ -164,9 +164,6 @@ func (s *Server) init() error {
 	}
 	log.Debug("grpc init done ...")
 
-	s.rootCoord.UpdateStateCode(commonpb.StateCode_Initializing)
-	log.Debug("RootCoord", zap.Any("State", commonpb.StateCode_Initializing))
-
 	if s.newDataCoordClient != nil {
 		log.Debug("RootCoord start to create DataCoord client")
 		dataCoord := s.newDataCoordClient(rootcoord.Params.EtcdCfg.MetaRootPath.GetValue(), s.etcdCli)
diff --git a/internal/querycoordv2/server.go b/internal/querycoordv2/server.go
index f1ec76d709..383cefdb82 100644
--- a/internal/querycoordv2/server.go
+++ b/internal/querycoordv2/server.go
@@ -179,7 +179,6 @@ func (s *Server) Init() error {
 				log.Error("QueryCoord init failed", zap.Error(err))
 				return err
 			}
-			s.UpdateStateCode(commonpb.StateCode_Healthy)
 			log.Info("QueryCoord startup success")
 			return nil
 		}
@@ -192,6 +191,8 @@ func (s *Server) Init() error {
 }
 
 func (s *Server) initQueryCoord() error {
+	s.UpdateStateCode(commonpb.StateCode_Initializing)
+	log.Info("QueryCoord", zap.Any("State", commonpb.StateCode_Initializing))
 	// Init KV
 	etcdKV := etcdkv.NewEtcdKV(s.etcdCli, Params.EtcdCfg.MetaRootPath.GetValue())
 	s.kv = etcdKV
@@ -356,7 +357,6 @@ func (s *Server) Start() error {
 		if err := s.startQueryCoord(); err != nil {
 			return err
 		}
-		s.UpdateStateCode(commonpb.StateCode_Healthy)
 		log.Info("QueryCoord started")
 	}
 	return nil
@@ -386,6 +386,7 @@ func (s *Server) startQueryCoord() error {
 	}
 	s.startServerLoop()
 	s.afterStart()
+	s.UpdateStateCode(commonpb.StateCode_Healthy)
 	return nil
 }
 
diff --git a/internal/querycoordv2/server_test.go b/internal/querycoordv2/server_test.go
index e2b7db482e..df285ba04a 100644
--- a/internal/querycoordv2/server_test.go
+++ b/internal/querycoordv2/server_test.go
@@ -228,11 +228,13 @@ func (suite *ServerSuite) TestDisableActiveStandby() {
 
 	suite.server, err = newQueryCoord()
 	suite.NoError(err)
+	suite.Equal(commonpb.StateCode_Initializing, suite.server.status.Load().(commonpb.StateCode))
 	suite.hackServer()
 	err = suite.server.Start()
 	suite.NoError(err)
 	err = suite.server.Register()
 	suite.NoError(err)
+	suite.Equal(commonpb.StateCode_Healthy, suite.server.status.Load().(commonpb.StateCode))
 
 	states, err := suite.server.GetComponentStates(context.Background())
 	suite.NoError(err)
diff --git a/internal/rootcoord/root_coord.go b/internal/rootcoord/root_coord.go
index a5b5570835..a23cb7f195 100644
--- a/internal/rootcoord/root_coord.go
+++ b/internal/rootcoord/root_coord.go
@@ -292,7 +292,6 @@ func (c *Core) Register() error {
 		}
 	})
 
-	c.UpdateStateCode(commonpb.StateCode_Healthy)
 	return nil
 }
 
@@ -406,6 +405,7 @@ func (c *Core) initImportManager() error {
 }
 
 func (c *Core) initInternal() error {
+	c.UpdateStateCode(commonpb.StateCode_Initializing)
 	c.initKVCreator()
 
 	if err := c.initMetaTable(); err != nil {
@@ -487,8 +487,6 @@ func (c *Core) Init() error {
 					log.Error("RootCoord start failed", zap.Error(err))
 				}
 			})
-
-			c.UpdateStateCode(commonpb.StateCode_Healthy)
 			log.Info("RootCoord startup success")
 			return err
 		}
diff --git a/internal/rootcoord/root_coord_test.go b/internal/rootcoord/root_coord_test.go
index 72b71130b7..f8a101c7b9 100644
--- a/internal/rootcoord/root_coord_test.go
+++ b/internal/rootcoord/root_coord_test.go
@@ -1415,11 +1415,63 @@ func TestRootcoord_EnableActiveStandby(t *testing.T) {
 	assert.NoError(t, err)
 	err = core.Init()
 	assert.NoError(t, err)
+	assert.Equal(t, commonpb.StateCode_StandBy, core.stateCode.Load().(commonpb.StateCode))
 	err = core.Start()
 	assert.NoError(t, err)
 	core.session.TriggerKill = false
 	err = core.Register()
 	assert.NoError(t, err)
+	assert.Equal(t, commonpb.StateCode_Healthy, core.stateCode.Load().(commonpb.StateCode))
+	resp, err := core.DescribeCollection(ctx, &milvuspb.DescribeCollectionRequest{
+		Base: &commonpb.MsgBase{
+			MsgType:   commonpb.MsgType_DescribeCollection,
+			MsgID:     0,
+			Timestamp: 0,
+			SourceID:  paramtable.GetNodeID(),
+		},
+		CollectionName: "unexist"})
+	assert.NoError(t, err)
+	assert.NotEqual(t, commonpb.ErrorCode_Success, resp.GetStatus().GetErrorCode())
+	err = core.Stop()
+	assert.NoError(t, err)
+}
+
+// make sure the main functions work well when EnableActiveStandby=false
+func TestRootcoord_DisableActiveStandby(t *testing.T) {
+	randVal := rand.Int()
+	Params.Init()
+	Params.BaseTable.Save("etcd.rootPath", fmt.Sprintf("/%d", randVal))
+	paramtable.Get().Save(Params.RootCoordCfg.EnableActiveStandby.Key, "false")
+	paramtable.Get().Save(Params.CommonCfg.RootCoordTimeTick.Key, fmt.Sprintf("rootcoord-time-tick-%d", randVal))
+	paramtable.Get().Save(Params.CommonCfg.RootCoordStatistics.Key, fmt.Sprintf("rootcoord-statistics-%d", randVal))
+	paramtable.Get().Save(Params.CommonCfg.RootCoordSubName.Key, fmt.Sprintf("subname-%d", randVal))
+	paramtable.Get().Save(Params.CommonCfg.RootCoordDml.Key, fmt.Sprintf("rootcoord-dml-test-%d", randVal))
+	paramtable.Get().Save(Params.CommonCfg.RootCoordDelta.Key, fmt.Sprintf("rootcoord-delta-test-%d", randVal))
+
+	ctx := context.Background()
+	coreFactory := dependency.NewDefaultFactory(true)
+	etcdCli, err := etcd.GetEtcdClient(
+		Params.EtcdCfg.UseEmbedEtcd.GetAsBool(),
+		Params.EtcdCfg.EtcdUseSSL.GetAsBool(),
+		Params.EtcdCfg.Endpoints.GetAsStrings(),
+		Params.EtcdCfg.EtcdTLSCert.GetValue(),
+		Params.EtcdCfg.EtcdTLSKey.GetValue(),
+		Params.EtcdCfg.EtcdTLSCACert.GetValue(),
+		Params.EtcdCfg.EtcdTLSMinVersion.GetValue())
+	assert.NoError(t, err)
+	defer etcdCli.Close()
+	core, err := NewCore(ctx, coreFactory)
+	core.etcdCli = etcdCli
+	assert.NoError(t, err)
+	err = core.Init()
+	assert.NoError(t, err)
+	assert.Equal(t, commonpb.StateCode_Initializing, core.stateCode.Load().(commonpb.StateCode))
+	err = core.Start()
+	assert.NoError(t, err)
+	core.session.TriggerKill = false
+	err = core.Register()
+	assert.NoError(t, err)
+	assert.Equal(t, commonpb.StateCode_Healthy, core.stateCode.Load().(commonpb.StateCode))
 	resp, err := core.DescribeCollection(ctx, &milvuspb.DescribeCollectionRequest{
 		Base: &commonpb.MsgBase{
 			MsgType:   commonpb.MsgType_DescribeCollection,