diff --git a/api/v2/api.go b/api/v2/api.go
index 8ce9b5920..fcb0f7f02 100644
--- a/api/v2/api.go
+++ b/api/v2/api.go
@@ -37,6 +37,7 @@ func RegisterOpenAPIV2Routes(router *gin.Engine, api OpenAPIV2) {
 	v2.Use(middleware.ErrorHandleMiddleware())
 
 	v2.GET("status", api.serverStatus)
+	v2.POST("/log", api.setLogLevel)
 	// For compatibility with the old API.
 	// TiDB Operator relies on this API to determine whether the TiCDC node is healthy.
 	router.GET("/status", api.serverStatus)
diff --git a/api/v2/log.go b/api/v2/log.go
new file mode 100644
index 000000000..7e1fb047a
--- /dev/null
+++ b/api/v2/log.go
@@ -0,0 +1,52 @@
+// Copyright 2024 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package v2
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/pingcap/log"
+	cerror "github.com/pingcap/tiflow/pkg/errors"
+	"github.com/pingcap/tiflow/pkg/logutil"
+	"go.uber.org/zap"
+)
+
+// SetLogLevel changes TiCDC log level dynamically.
+// @Summary Change TiCDC log level
+// @Description change TiCDC log level dynamically
+// @Tags common,v2
+// @Accept json
+// @Produce json
+// @Param log_level body LogLevelReq true "log level"
+// @Success 200 {object} EmptyResponse
+// @Failure 400 {object} model.HTTPError
+// @Router	/api/v2/log [post]
+func (h *OpenAPIV2) setLogLevel(c *gin.Context) {
+	req := &LogLevelReq{Level: "info"}
+	err := c.BindJSON(&req)
+	if err != nil {
+		_ = c.Error(cerror.ErrAPIInvalidParam.GenWithStack("invalid log level: %s", err.Error()))
+		return
+	}
+
+	err = logutil.SetLogLevel(req.Level)
+	if err != nil {
+		_ = c.Error(cerror.ErrAPIInvalidParam.GenWithStack(
+			"fail to change log level: %s", req.Level))
+		return
+	}
+	log.Warn("log level changed", zap.String("level", req.Level))
+	c.JSON(http.StatusOK, &EmptyResponse{})
+}
diff --git a/maintainer/barrier.go b/maintainer/barrier.go
index 807ed3806..49cb91248 100644
--- a/maintainer/barrier.go
+++ b/maintainer/barrier.go
@@ -60,7 +60,7 @@ func (b *Barrier) HandleStatus(from node.ID,
 	request *heartbeatpb.BlockStatusRequest) *messaging.TargetMessage {
 	log.Debug("handle block status", zap.String("from", from.String()),
 		zap.String("changefeed", request.ChangefeedID.GetName()),
-		zap.String("detail", request.String()))
+		zap.Any("detail", request))
 	eventMap := make(map[*BarrierEvent][]*heartbeatpb.DispatcherID)
 	var dispatcherStatus []*heartbeatpb.DispatcherStatus
 	for _, status := range request.BlockStatuses {
diff --git a/maintainer/barrier_event.go b/maintainer/barrier_event.go
index 979eac718..0f2b214b6 100644
--- a/maintainer/barrier_event.go
+++ b/maintainer/barrier_event.go
@@ -109,7 +109,8 @@ func NewBlockEvent(cfID common.ChangeFeedID, controller *Controller,
 	log.Info("new block event is created",
 		zap.String("changefeedID", cfID.Name()),
 		zap.Uint64("block-ts", event.commitTs),
-		zap.Bool("sync-point", event.isSyncPoint))
+		zap.Bool("sync-point", event.isSyncPoint),
+		zap.Any("detail", status))
 	return event
 }
 
@@ -276,17 +277,22 @@ func (be *BarrierEvent) resend() []*messaging.TargetMessage {
 	if time.Since(be.lastResendTime) < time.Second {
 		return nil
 	}
-	if time.Since(be.lastWarningLogTime) > time.Second*10 {
-		log.Warn("barrier event is not resolved",
-			zap.String("changefeed", be.cfID.Name()),
-			zap.Uint64("commitTs", be.commitTs),
-			zap.Bool("isSyncPoint", be.isSyncPoint),
-			zap.Bool("selected", be.selected),
-			zap.Bool("writerDispatcherAdvanced", be.writerDispatcherAdvanced),
-			zap.String("coverage", be.rangeChecker.Detail()),
-		)
-		be.lastWarningLogTime = time.Now()
-	}
+	var msgs []*messaging.TargetMessage
+	defer func() {
+		if time.Since(be.lastWarningLogTime) > time.Second*10 {
+			log.Warn("barrier event is not resolved",
+				zap.String("changefeed", be.cfID.Name()),
+				zap.Uint64("commitTs", be.commitTs),
+				zap.Bool("isSyncPoint", be.isSyncPoint),
+				zap.Bool("selected", be.selected),
+				zap.Bool("writerDispatcherAdvanced", be.writerDispatcherAdvanced),
+				zap.String("coverage", be.rangeChecker.Detail()),
+				zap.Any("resend", msgs),
+			)
+			be.lastWarningLogTime = time.Now()
+		}
+	}()
+
 	// still waiting for all dispatcher to reach the block commit ts
 	if !be.selected {
 		return nil
@@ -304,10 +310,12 @@ func (be *BarrierEvent) resend() []*messaging.TargetMessage {
 			// todo: select a new writer
 			return nil
 		}
-		return []*messaging.TargetMessage{be.newWriterActionMessage(stm.GetNodeID())}
+		msgs = []*messaging.TargetMessage{be.newWriterActionMessage(stm.GetNodeID())}
+	} else {
+		// the writer dispatcher is advanced, resend pass action
+		msgs = be.sendPassAction()
 	}
-	// the writer dispatcher is advanced, resend pass action
-	return be.sendPassAction()
+	return msgs
 }
 
 func (be *BarrierEvent) newWriterActionMessage(capture node.ID) *messaging.TargetMessage {
diff --git a/maintainer/replica/replication_span.go b/maintainer/replica/replication_span.go
index 1013fab81..7fb546820 100644
--- a/maintainer/replica/replication_span.go
+++ b/maintainer/replica/replication_span.go
@@ -143,6 +143,7 @@ func (r *SpanReplication) NewAddDispatcherMessage(server node.ID) (*messaging.Ta
 			ChangefeedID: r.ChangefeedID.ToPB(),
 			Config: &heartbeatpb.DispatcherConfig{
 				DispatcherID: r.ID.ToPB(),
+				SchemaID:     r.schemaID,
 				Span:         r.Span,
 				StartTs:      r.status.Load().CheckpointTs,
 				CurrentPdTs:  ts,
diff --git a/maintainer/replica/replication_span_test.go b/maintainer/replica/replication_span_test.go
index 9c0f892ab..981459a32 100644
--- a/maintainer/replica/replication_span_test.go
+++ b/maintainer/replica/replication_span_test.go
@@ -55,6 +55,7 @@ func TestSpanReplication_NewAddDispatcherMessage(t *testing.T) {
 	require.Equal(t, heartbeatpb.ScheduleAction_Create, req.ScheduleAction)
 	require.Equal(t, oracle.ComposeTS(10, 1), req.Config.CurrentPdTs)
 	require.Equal(t, replicaSet.ID.ToPB(), req.Config.DispatcherID)
+	require.Equal(t, replicaSet.schemaID, req.Config.SchemaID)
 
 	tsoClient.EXPECT().GetTS(gomock.Any()).Return(int64(1), int64(1), errors.New("error")).AnyTimes()
 	_, err = replicaSet.NewAddDispatcherMessage("node1")