diff --git a/coordinator/coordinator.go b/coordinator/coordinator.go
index 156e96424..fe083bb3e 100644
--- a/coordinator/coordinator.go
+++ b/coordinator/coordinator.go
@@ -116,11 +116,6 @@ func (c *coordinator) Tick(
 	metrics.CoordinatorCounter.Add(float64(now.Sub(c.lastTickTime)) / float64(time.Second))
 	c.lastTickTime = now
 
-	// Owner should update GC safepoint before initializing changefeed, so
-	// changefeed can remove its "ticdc-creating" service GC safepoint during
-	// initializing.
-	//
-	// See more gc doc.
 	if err := c.updateGCSafepoint(ctx, state); err != nil {
 		return nil, errors.Trace(err)
 	}
diff --git a/scheduler/state_machine.go b/scheduler/state_machine.go
index 28567ca94..1e14fd491 100644
--- a/scheduler/state_machine.go
+++ b/scheduler/state_machine.go
@@ -173,7 +173,7 @@ func NewStateMachine(
 			// proceeding further scheduling.
 			log.Warn("found a stopping server during initializing",
 				zap.Any("ID", sm.ID),
-				zap.Any("statemachine", sm),
+				zap.Any("statemachine", sm.ID),
 				zap.Any("status", status))
 			err := sm.setCapture(captureID, RoleUndetermined)
 			if err != nil {
@@ -186,7 +186,6 @@ func NewStateMachine(
 		default:
 			log.Warn("unknown inferior state",
 				zap.Any("ID", sm.ID),
-				zap.Any("statemachine", sm),
 				zap.Any("status", status))
 		}
 	}
@@ -195,7 +194,7 @@ func NewStateMachine(
 	if len(sm.Primary) != 0 {
 		sm.State = SchedulerStatusWorking
 		log.Info("initialize a working state state machine",
-			zap.Any("statemachine", sm))
+			zap.Any("statemachine", sm.ID))
 	}
 	// Move inferior or add inferior is in-progress.
 	if sm.hasRole(RoleSecondary) {
@@ -266,7 +265,7 @@ func (s *StateMachine) promoteSecondary(captureID model.CaptureID) error {
 	if s.Primary == captureID {
 		log.Warn("server is already promoted as the primary",
 			zap.String("captureID", captureID),
-			zap.Any("statemachine", s))
+			zap.Any("statemachine", s.ID))
 		return nil
 	}
 	role, ok := s.Servers[captureID]
@@ -295,7 +294,7 @@ func (s *StateMachine) inconsistentError(
 	fields = append(fields, []zap.Field{
 		zap.String("captureID", captureID),
 		zap.Any("state", input),
-		zap.Any("statemachine", s),
+		zap.Any("statemachine", s.ID),
 	}...)
 	log.L().WithOptions(zap.AddCallerSkip(1)).Error(msg, fields...)
 	return errors.New("inconsistent error: " + msg)
@@ -307,7 +306,7 @@ func (s *StateMachine) multiplePrimaryError(
 	fields = append(fields, []zap.Field{
 		zap.String("captureID", captureID),
 		zap.Any("state", input),
-		zap.Any("statemachine", s),
+		zap.Any("statemachine", s.ID),
 	}...)
 	log.L().WithOptions(zap.AddCallerSkip(1)).Error(msg, fields...)
 	return errors.New("inconsistent error: " + msg)
@@ -442,7 +441,7 @@ func (s *StateMachine) pollOnAbsent(
 	log.Warn("ignore input, unexpected state",
 		zap.Any("status", input),
 		zap.String("captureID", captureID),
-		zap.Any("statemachine", s))
+		zap.Any("statemachine", s.ID))
 	return nil, false, nil
 }
 
@@ -482,7 +481,7 @@ func (s *StateMachine) pollOnPrepare(
 			log.Info("primary is stopped during Prepare",
 				zap.Any("status", input),
 				zap.String("captureID", captureID),
-				zap.Any("statemachine", s))
+				zap.Any("statemachine", s.ID))
 			s.clearPrimary()
 			return nil, false, nil
 		}
@@ -514,7 +513,7 @@ func (s *StateMachine) pollOnPrepare(
 	log.Warn("ignore input, unexpected state",
 		zap.Any("status", input),
 		zap.String("captureID", captureID),
-		zap.Any("statemachine", s))
+		zap.Any("statemachine", s.ID))
 	return nil, false, nil
 }
 
@@ -538,7 +537,7 @@ func (s *StateMachine) pollOnCommit(
 				log.Info("there are unknown captures during commit",
 					zap.Any("status", input),
 					zap.String("captureID", captureID),
-					zap.Any("statemachine", s))
+					zap.Any("statemachine", s.ID))
 				return nil, false, nil
 			}
 			// No primary, promote secondary to primary.
@@ -551,7 +550,7 @@ func (s *StateMachine) pollOnCommit(
 			log.Info("promote secondary, no primary",
 				zap.Any("status", input),
 				zap.String("captureID", captureID),
-				zap.Any("statemachine", s))
+				zap.Any("statemachine", s.ID))
 		}
 		// Secondary has been promoted, retry add inferior request.
 		if s.Primary == captureID && !s.hasRole(RoleSecondary) {
@@ -568,7 +567,7 @@ func (s *StateMachine) pollOnCommit(
 				log.Info("primary is stopped during Commit",
 					zap.Any("status", input),
 					zap.String("captureID", captureID),
-					zap.Any("statemachine", s))
+					zap.Any("statemachine", s.ID))
 				s.State = SchedulerStatusAbsent
 				return nil, true, nil
 			}
@@ -581,7 +580,7 @@ func (s *StateMachine) pollOnCommit(
 			log.Info("state promote secondary",
 				zap.Any("status", input),
 				zap.String("secondary", captureID),
-				zap.Any("statemachine", s),
+				zap.Any("statemachine", s.ID),
 				zap.String("original", original))
 			return s.Inferior.NewAddInferiorMessage(s.Primary, false), false, nil
 		} else if s.isInRole(captureID, RoleSecondary) {
@@ -591,7 +590,7 @@ func (s *StateMachine) pollOnCommit(
 			log.Info("secondary is stopped during Commit",
 				zap.Any("status", input),
 				zap.String("captureID", captureID),
-				zap.Any("statemachine", s))
+				zap.Any("statemachine", s.ID))
 			err := s.clearCapture(captureID, RoleSecondary)
 			if err != nil {
 				return nil, false, errors.Trace(err)
@@ -605,7 +604,7 @@ func (s *StateMachine) pollOnCommit(
 			log.Info("server is stopped during Commit",
 				zap.Any("status", input),
 				zap.String("captureID", captureID),
-				zap.Any("statemachine", s))
+				zap.Any("statemachine", s.ID))
 			err := s.clearCapture(captureID, RoleUndetermined)
 			return nil, false, errors.Trace(err)
 		}
@@ -632,7 +631,7 @@ func (s *StateMachine) pollOnCommit(
 			//    the primary, Stopping or Stopped.
 			s.State = SchedulerStatusWorking
 			log.Info("state transition from commit to working",
-				zap.String("changefeedID", s.ID.String()),
+				zap.String("statemachine", s.ID.String()),
 				zap.String("inferiorID", input.GetInferiorID().String()))
 			return nil, true, nil
 		}
@@ -647,7 +646,7 @@ func (s *StateMachine) pollOnCommit(
 			log.Info("server is stopping during Commit",
 				zap.Any("status", input),
 				zap.String("captureID", captureID),
-				zap.Any("statemachine", s))
+				zap.Any("statemachine", s.ID))
 			return nil, false, nil
 		}
 
@@ -656,7 +655,7 @@ func (s *StateMachine) pollOnCommit(
 	log.Warn("ignore input, unexpected state",
 		zap.Any("status", input),
 		zap.String("captureID", captureID),
-		zap.Any("statemachine", s))
+		zap.Any("statemachine", s.ID))
 	return nil, false, nil
 }
 
@@ -721,7 +720,7 @@ func (s *StateMachine) pollOnRemoving(
 			log.Warn("remove server with error",
 				zap.Any("status", input),
 				zap.String("captureID", captureID),
-				zap.Any("statemachine", s),
+				zap.Any("statemachine", s.ID),
 				zap.Error(err))
 		}
 		return nil, false, nil
@@ -732,7 +731,7 @@ func (s *StateMachine) pollOnRemoving(
 	log.Warn("ignore input, unexpected  state",
 		zap.Any("status", input),
 		zap.String("captureID", captureID),
-		zap.Any("statemachine", s))
+		zap.Any("statemachine", s.ID))
 	return nil, false, nil
 }
 
@@ -749,7 +748,7 @@ func (s *StateMachine) HandleAddInferior(
 	if s.State != SchedulerStatusAbsent {
 		log.Warn("add inferior is ignored",
 			zap.String("captureID", captureID),
-			zap.Any("statemachine", s))
+			zap.Any("statemachine", s.ID))
 		return nil, nil
 	}
 	err := s.setCapture(captureID, RoleSecondary)
@@ -778,7 +777,7 @@ func (s *StateMachine) HandleMoveInferior(
 	// Ignore move inferior if it has been removed already.
 	if s.HasRemoved() {
 		log.Warn("move inferior is ignored",
-			zap.Any("statemachine", s))
+			zap.Any("statemachine", s.ID))
 		return nil, nil
 	}
 	// Ignore move inferior if
@@ -786,7 +785,7 @@ func (s *StateMachine) HandleMoveInferior(
 	// 2) the dest server is the primary.
 	if s.State != SchedulerStatusWorking || s.Primary == dest {
 		log.Warn("move inferior is ignored",
-			zap.Any("statemachine", s))
+			zap.Any("statemachine", s.ID))
 		return nil, nil
 	}
 	oldState := s.State
@@ -795,14 +794,14 @@ func (s *StateMachine) HandleMoveInferior(
 	if err != nil {
 		log.Info("move inferior is failed",
 			zap.Stringer("new", s.State),
-			zap.Any("statemachine", s),
+			zap.Any("statemachine", s.ID),
 			zap.Stringer("old", oldState),
 			zap.Error(err))
 		return nil, errors.Trace(err)
 	}
 	log.Info("state transition, move inferior",
 		zap.Stringer("new", s.State),
-		zap.Any("statemachine", s),
+		zap.Any("statemachine", s.ID),
 		zap.Stringer("old", oldState))
 	status := s.Inferior.NewInferiorStatus(heartbeatpb.ComponentState_Absent)
 	return s.poll(status, dest)
@@ -812,19 +811,19 @@ func (s *StateMachine) HandleRemoveInferior() ([]rpc.Message, error) {
 	// Ignore remove inferior if it has been removed already.
 	if s.HasRemoved() {
 		log.Warn("remove inferior is ignored",
-			zap.Any("statemachine", s))
+			zap.Any("statemachine", s.ID))
 		return nil, nil
 	}
 	// Ignore remove inferior if it's not in Working state.
 	if s.State == SchedulerStatusRemoving {
 		log.Warn("remove inferior is ignored",
-			zap.Any("statemachine", s))
+			zap.Any("statemachine", s.ID))
 		return nil, nil
 	}
 	oldState := s.State
 	s.State = SchedulerStatusRemoving
 	log.Info("state transition, remove inferiror",
-		zap.Any("statemachine", s),
+		zap.Any("statemachine", s.ID),
 		zap.Stringer("old", oldState))
 	// fake status to trigger a stop message
 	status := s.Inferior.NewInferiorStatus(heartbeatpb.ComponentState_Working)
@@ -847,7 +846,7 @@ func (s *StateMachine) HandleCaptureShutdown(
 	oldState := s.State
 	msgs, err := s.poll(status, captureID)
 	log.Info("state transition, server shutdown",
-		zap.Any("statemachine", s),
+		zap.Any("statemachine", s.ID),
 		zap.Stringer("old", oldState),
 		zap.Stringer("new", s.State))
 	return msgs, true, errors.Trace(err)