Add tickle for datacoord watch event (#21193)

Signed-off-by: aoiasd <zhicheng.yue@zilliz.com>

configs/milvus.yaml

@@ -280,7 +280,7 @@ dataCoord:
   enableActiveStandby: false  # Enable active-standby
 
   channel:
-    maxWatchDuration: 600 # Timeout on watching channels (in seconds). Default 600 seconds.
+    watchTimeoutInterval: 30 # Timeout on watching channels (in seconds). Datanode tickler update watch progress will reset timeout timer.
 
   segment:
     maxSize: 512 # Maximum size of a segment in MB

internal/datacoord/channel_checker.go

@@ -33,10 +33,12 @@ import (
 )
 
 type channelStateTimer struct {
-	watchkv        kv.MetaKv
-	runningTimers  sync.Map // channel name to timer stop channels
-	etcdWatcher    clientv3.WatchChan
-	timeoutWatcher chan *ackEvent
+	watchkv kv.MetaKv
+
+	runningTimers     sync.Map
+	runningTimerStops sync.Map // channel name to timer stop channels
+	etcdWatcher       clientv3.WatchChan
+	timeoutWatcher    chan *ackEvent
 }
 
 func newChannelStateTimer(kv kv.MetaKv) *channelStateTimer {
@@ -49,7 +51,6 @@ func newChannelStateTimer(kv kv.MetaKv) *channelStateTimer {
 func (c *channelStateTimer) getWatchers(prefix string) (clientv3.WatchChan, chan *ackEvent) {
 	if c.etcdWatcher == nil {
 		c.etcdWatcher = c.watchkv.WatchWithPrefix(prefix)
-
 	}
 	return c.etcdWatcher, c.timeoutWatcher
 }
@@ -80,8 +81,8 @@ func (c *channelStateTimer) loadAllChannels(nodeID UniqueID) ([]*datapb.ChannelW
 }
 
 // startOne can write ToWatch or ToRelease states.
-func (c *channelStateTimer) startOne(watchState datapb.ChannelWatchState, channelName string, nodeID UniqueID, timeoutTs int64) {
-	if timeoutTs == 0 {
+func (c *channelStateTimer) startOne(watchState datapb.ChannelWatchState, channelName string, nodeID UniqueID, timeout time.Duration) {
+	if timeout == 0 {
 		log.Info("zero timeoutTs, skip starting timer",
 			zap.String("watch state", watchState.String()),
 			zap.Int64("nodeID", nodeID),
@@ -89,23 +90,29 @@ func (c *channelStateTimer) startOne(watchState datapb.ChannelWatchState, channe
 		)
 		return
 	}
+
 	stop := make(chan struct{})
+	ticker := time.NewTimer(timeout)
 	c.removeTimers([]string{channelName})
-	c.runningTimers.Store(channelName, stop)
-	timeoutT := time.Unix(0, timeoutTs)
+	c.runningTimerStops.Store(channelName, stop)
+	c.runningTimers.Store(channelName, ticker)
+
 	go func() {
 		log.Info("timer started",
 			zap.String("watch state", watchState.String()),
 			zap.Int64("nodeID", nodeID),
 			zap.String("channel name", channelName),
-			zap.Time("timeout time", timeoutT))
+			zap.Duration("check interval", timeout))
+		defer ticker.Stop()
+
 		select {
-		case <-time.NewTimer(time.Until(timeoutT)).C:
+		case <-ticker.C:
+			// check tickle at path as :tickle/[prefix]/{channel_name}
 			log.Info("timeout and stop timer: wait for channel ACK timeout",
 				zap.String("watch state", watchState.String()),
 				zap.Int64("nodeID", nodeID),
 				zap.String("channel name", channelName),
-				zap.Time("timeout time", timeoutT))
+				zap.Duration("timeout interval", timeout))
 			ackType := getAckType(watchState)
 			c.notifyTimeoutWatcher(&ackEvent{ackType, channelName, nodeID})
 		case <-stop:
@@ -113,7 +120,7 @@ func (c *channelStateTimer) startOne(watchState datapb.ChannelWatchState, channe
 				zap.String("watch state", watchState.String()),
 				zap.Int64("nodeID", nodeID),
 				zap.String("channel name", channelName),
-				zap.Time("timeout time", timeoutT))
+				zap.Duration("timeout interval", timeout))
 		}
 	}()
 }
@@ -124,16 +131,25 @@ func (c *channelStateTimer) notifyTimeoutWatcher(e *ackEvent) {
 
 func (c *channelStateTimer) removeTimers(channels []string) {
 	for _, channel := range channels {
-		if stop, ok := c.runningTimers.LoadAndDelete(channel); ok {
+		if stop, ok := c.runningTimerStops.LoadAndDelete(channel); ok {
 			close(stop.(chan struct{}))
+			c.runningTimers.Delete(channel)
 		}
 	}
 }
 
 func (c *channelStateTimer) stopIfExist(e *ackEvent) {
-	stop, ok := c.runningTimers.LoadAndDelete(e.channelName)
+	stop, ok := c.runningTimerStops.LoadAndDelete(e.channelName)
 	if ok && e.ackType != watchTimeoutAck && e.ackType != releaseTimeoutAck {
 		close(stop.(chan struct{}))
+		c.runningTimers.Delete(e.channelName)
+	}
+}
+
+func (c *channelStateTimer) resetIfExist(channel string, interval time.Duration) {
+	if value, ok := c.runningTimers.Load(channel); ok {
+		timer := value.(*time.Timer)
+		timer.Reset(interval)
 	}
 }
 

internal/datacoord/channel_checker_test.go

@@ -52,10 +52,9 @@ func TestChannelStateTimer(t *testing.T) {
 		timer.loadAllChannels(1)
 
 		validWatchInfo := datapb.ChannelWatchInfo{
-			Vchan:     &datapb.VchannelInfo{},
-			StartTs:   time.Now().Unix(),
-			State:     datapb.ChannelWatchState_ToWatch,
-			TimeoutTs: time.Now().Add(20 * time.Millisecond).UnixNano(),
+			Vchan:   &datapb.VchannelInfo{},
+			StartTs: time.Now().Unix(),
+			State:   datapb.ChannelWatchState_ToWatch,
 		}
 		validData, err := proto.Marshal(&validWatchInfo)
 		require.NoError(t, err)
@@ -87,18 +86,20 @@ func TestChannelStateTimer(t *testing.T) {
 	})
 
 	t.Run("test startOne", func(t *testing.T) {
-		normalTimeoutTs := time.Now().Add(20 * time.Second).UnixNano()
-		nowTimeoutTs := time.Now().UnixNano()
-		zeroTimeoutTs := int64(0)
+		normalTimeoutTs := 20 * time.Second
+		nowTimeoutTs := 1 * time.Millisecond
+		zeroTimeoutTs := 0 * time.Second
+		resetTimeoutTs := 30 * time.Second
 		tests := []struct {
 			channelName string
-			timeoutTs   int64
+			timeoutTs   time.Duration
 
 			description string
 		}{
 			{"channel-1", normalTimeoutTs, "test stop"},
 			{"channel-2", nowTimeoutTs, "test timeout"},
 			{"channel-3", zeroTimeoutTs, "not start"},
+			{"channel-4", resetTimeoutTs, "reset timer"},
 		}
 
 		timer := newChannelStateTimer(kv)
@@ -112,6 +113,11 @@ func TestChannelStateTimer(t *testing.T) {
 					e := <-timeoutCh
 					assert.Equal(t, watchTimeoutAck, e.ackType)
 					assert.Equal(t, test.channelName, e.channelName)
+				} else if test.timeoutTs == resetTimeoutTs {
+					timer.resetIfExist(test.channelName, nowTimeoutTs)
+					e := <-timeoutCh
+					assert.Equal(t, watchTimeoutAck, e.ackType)
+					assert.Equal(t, test.channelName, e.channelName)
 				} else {
 					timer.stopIfExist(&ackEvent{watchSuccessAck, test.channelName, 1})
 				}
@@ -123,18 +129,17 @@ func TestChannelStateTimer(t *testing.T) {
 	})
 
 	t.Run("test startOne no leaking issue 17335", func(t *testing.T) {
-		timeoutTs := time.Now().Add(20 * time.Second).UnixNano()
 		timer := newChannelStateTimer(kv)
 
-		timer.startOne(datapb.ChannelWatchState_ToRelease, "channel-1", 1, timeoutTs)
-		stop, ok := timer.runningTimers.Load("channel-1")
+		timer.startOne(datapb.ChannelWatchState_ToRelease, "channel-1", 1, 20*time.Second)
+		stop, ok := timer.runningTimerStops.Load("channel-1")
 		require.True(t, ok)
 
-		timer.startOne(datapb.ChannelWatchState_ToWatch, "channel-1", 1, timeoutTs)
+		timer.startOne(datapb.ChannelWatchState_ToWatch, "channel-1", 1, 20*time.Second)
 		_, ok = <-stop.(chan struct{})
 		assert.False(t, ok)
 
-		stop2, ok := timer.runningTimers.Load("channel-1")
+		stop2, ok := timer.runningTimerStops.Load("channel-1")
 		assert.True(t, ok)
 
 		timer.removeTimers([]string{"channel-1"})
@@ -151,10 +156,9 @@ func TestChannelStateTimer_parses(t *testing.T) {
 
 	t.Run("test parseWatchInfo", func(t *testing.T) {
 		validWatchInfo := datapb.ChannelWatchInfo{
-			Vchan:     &datapb.VchannelInfo{},
-			StartTs:   time.Now().Unix(),
-			State:     datapb.ChannelWatchState_ToWatch,
-			TimeoutTs: time.Now().Add(20 * time.Millisecond).UnixNano(),
+			Vchan:   &datapb.VchannelInfo{},
+			StartTs: time.Now().Unix(),
+			State:   datapb.ChannelWatchState_ToWatch,
 		}
 		validData, err := proto.Marshal(&validWatchInfo)
 		require.NoError(t, err)
@@ -186,7 +190,6 @@ func TestChannelStateTimer_parses(t *testing.T) {
 					assert.NotNil(t, info)
 					assert.Equal(t, info.GetState(), validWatchInfo.GetState())
 					assert.Equal(t, info.GetStartTs(), validWatchInfo.GetStartTs())
-					assert.Equal(t, info.GetTimeoutTs(), validWatchInfo.GetTimeoutTs())
 				} else {
 					assert.Nil(t, info)
 					assert.Error(t, err)
@@ -205,9 +208,8 @@ func TestChannelStateTimer_parses(t *testing.T) {
 				DroppedSegments:     []*datapb.SegmentInfo{{ID: 3}},
 				UnflushedSegmentIds: []int64{1},
 			},
-			StartTs:   time.Now().Unix(),
-			State:     datapb.ChannelWatchState_ToWatch,
-			TimeoutTs: time.Now().Add(20 * time.Millisecond).UnixNano(),
+			StartTs: time.Now().Unix(),
+			State:   datapb.ChannelWatchState_ToWatch,
 		}
 
 		oldData, err := proto.Marshal(&oldWatchInfo)

internal/datacoord/channel_manager.go

@@ -192,6 +192,7 @@ func (c *ChannelManager) checkOldNodes(nodes []UniqueID) error {
 	for nodeID, watchInfos := range nodeWatchInfos {
 		for _, info := range watchInfos {
 			channelName := info.GetVchan().GetChannelName()
+			checkInterval := Params.DataCoordCfg.WatchTimeoutInterval.GetAsDuration(time.Second)
 
 			log.Info("processing watch info",
 				zap.String("watch state", info.GetState().String()),
@@ -199,7 +200,7 @@ func (c *ChannelManager) checkOldNodes(nodes []UniqueID) error {
 
 			switch info.GetState() {
 			case datapb.ChannelWatchState_ToWatch, datapb.ChannelWatchState_Uncomplete:
-				c.stateTimer.startOne(datapb.ChannelWatchState_ToWatch, channelName, nodeID, info.GetTimeoutTs())
+				c.stateTimer.startOne(datapb.ChannelWatchState_ToWatch, channelName, nodeID, checkInterval)
 
 			case datapb.ChannelWatchState_WatchFailure:
 				if err := c.Release(nodeID, channelName); err != nil {
@@ -207,7 +208,7 @@ func (c *ChannelManager) checkOldNodes(nodes []UniqueID) error {
 				}
 
 			case datapb.ChannelWatchState_ToRelease:
-				c.stateTimer.startOne(datapb.ChannelWatchState_ToRelease, channelName, nodeID, info.GetTimeoutTs())
+				c.stateTimer.startOne(datapb.ChannelWatchState_ToRelease, channelName, nodeID, checkInterval)
 
 			case datapb.ChannelWatchState_ReleaseSuccess:
 				if err := c.Reassign(nodeID, channelName); err != nil {
@@ -446,11 +447,10 @@ func (c *ChannelManager) fillChannelWatchInfo(op *ChannelOp) {
 	for _, ch := range op.Channels {
 		vcInfo := c.h.GetDataVChanPositions(ch, allPartitionID)
 		info := &datapb.ChannelWatchInfo{
-			Vchan:     vcInfo,
-			StartTs:   time.Now().Unix(),
-			State:     datapb.ChannelWatchState_Uncomplete,
-			TimeoutTs: time.Now().Add(Params.DataCoordCfg.MaxWatchDuration.GetAsDuration(time.Second)).UnixNano(),
-			Schema:    ch.Schema,
+			Vchan:   vcInfo,
+			StartTs: time.Now().Unix(),
+			State:   datapb.ChannelWatchState_Uncomplete,
+			Schema:  ch.Schema,
 		}
 		op.ChannelWatchInfos = append(op.ChannelWatchInfos, info)
 	}
@@ -460,20 +460,19 @@ func (c *ChannelManager) fillChannelWatchInfo(op *ChannelOp) {
 func (c *ChannelManager) fillChannelWatchInfoWithState(op *ChannelOp, state datapb.ChannelWatchState) []string {
 	var channelsWithTimer = []string{}
 	startTs := time.Now().Unix()
-	timeoutTs := time.Now().Add(Params.DataCoordCfg.MaxWatchDuration.GetAsDuration(time.Second)).UnixNano()
+	checkInterval := Params.DataCoordCfg.WatchTimeoutInterval.GetAsDuration(time.Second)
 	for _, ch := range op.Channels {
 		vcInfo := c.h.GetDataVChanPositions(ch, allPartitionID)
 		info := &datapb.ChannelWatchInfo{
-			Vchan:     vcInfo,
-			StartTs:   startTs,
-			State:     state,
-			TimeoutTs: timeoutTs,
-			Schema:    ch.Schema,
+			Vchan:   vcInfo,
+			StartTs: startTs,
+			State:   state,
+			Schema:  ch.Schema,
 		}
 
 		// Only set timer for watchInfo not from bufferID
 		if op.NodeID != bufferID {
-			c.stateTimer.startOne(state, ch.Name, op.NodeID, timeoutTs)
+			c.stateTimer.startOne(state, ch.Name, op.NodeID, checkInterval)
 			channelsWithTimer = append(channelsWithTimer, ch.Name)
 		}
 
@@ -696,11 +695,13 @@ func (c *ChannelManager) watchChannelStatesLoop(ctx context.Context) {
 					continue
 				}
 
-				// ignore these states
+				// runnging states
 				state := watchInfo.GetState()
 				if state == datapb.ChannelWatchState_ToWatch ||
 					state == datapb.ChannelWatchState_ToRelease ||
 					state == datapb.ChannelWatchState_Uncomplete {
+					c.stateTimer.resetIfExist(watchInfo.GetVchan().ChannelName, Params.DataCoordCfg.WatchTimeoutInterval.GetAsDuration(time.Second))
+					log.Info("tickle update, timer delay", zap.String("channel", watchInfo.GetVchan().ChannelName), zap.Int32("progress", watchInfo.Progress))
 					continue
 				}
 

internal/datacoord/channel_manager_test.go

@@ -127,7 +127,7 @@ func TestChannelManager_StateTransfer(t *testing.T) {
 		waitAndCheckState(t, metakv, datapb.ChannelWatchState_WatchSuccess, nodeID, cName, collectionID)
 
 		assert.Eventually(t, func() bool {
-			_, loaded := chManager.stateTimer.runningTimers.Load(cName)
+			_, loaded := chManager.stateTimer.runningTimerStops.Load(cName)
 			return !loaded
 		}, waitFor, tick)
 
@@ -157,7 +157,7 @@ func TestChannelManager_StateTransfer(t *testing.T) {
 		waitAndCheckState(t, metakv, datapb.ChannelWatchState_ToRelease, nodeID, cName, collectionID)
 
 		assert.Eventually(t, func() bool {
-			_, loaded := chManager.stateTimer.runningTimers.Load(cName)
+			_, loaded := chManager.stateTimer.runningTimerStops.Load(cName)
 			return loaded
 		}, waitFor, tick)
 
@@ -193,7 +193,7 @@ func TestChannelManager_StateTransfer(t *testing.T) {
 
 		waitAndCheckState(t, metakv, datapb.ChannelWatchState_ToRelease, nodeID, cName, collectionID)
 		assert.Eventually(t, func() bool {
-			_, loaded := chManager.stateTimer.runningTimers.Load(cName)
+			_, loaded := chManager.stateTimer.runningTimerStops.Load(cName)
 			return loaded
 		}, waitFor, tick)
 
@@ -242,7 +242,7 @@ func TestChannelManager_StateTransfer(t *testing.T) {
 		assert.Error(t, err)
 		assert.Empty(t, w)
 
-		_, loaded := chManager.stateTimer.runningTimers.Load(cName)
+		_, loaded := chManager.stateTimer.runningTimerStops.Load(cName)
 		assert.True(t, loaded)
 		chManager.stateTimer.removeTimers([]string{cName})
 	})
@@ -279,7 +279,7 @@ func TestChannelManager_StateTransfer(t *testing.T) {
 		waitAndCheckState(t, metakv, datapb.ChannelWatchState_ToWatch, nodeID, cName, collectionID)
 
 		assert.Eventually(t, func() bool {
-			_, loaded := chManager.stateTimer.runningTimers.Load(cName)
+			_, loaded := chManager.stateTimer.runningTimerStops.Load(cName)
 			return loaded
 		}, waitFor, tick)
 		cancel()
@@ -331,7 +331,7 @@ func TestChannelManager_StateTransfer(t *testing.T) {
 		assert.Error(t, err)
 		assert.Empty(t, w)
 
-		_, loaded := chManager.stateTimer.runningTimers.Load(cName)
+		_, loaded := chManager.stateTimer.runningTimerStops.Load(cName)
 		assert.True(t, loaded)
 		chManager.stateTimer.removeTimers([]string{cName})
 	})
@@ -370,7 +370,7 @@ func TestChannelManager_StateTransfer(t *testing.T) {
 
 		waitAndCheckState(t, metakv, datapb.ChannelWatchState_ToWatch, nodeID, cName, collectionID)
 		assert.Eventually(t, func() bool {
-			_, loaded := chManager.stateTimer.runningTimers.Load(cName)
+			_, loaded := chManager.stateTimer.runningTimerStops.Load(cName)
 			return loaded
 		}, waitFor, tick)
 
@@ -585,7 +585,7 @@ func TestChannelManager(t *testing.T) {
 				bufferID: {bufferID, []*channel{}},
 			},
 		}
-		chManager.stateTimer.startOne(datapb.ChannelWatchState_ToRelease, "channel-1", 1, time.Now().Add(Params.DataCoordCfg.MaxWatchDuration.GetAsDuration(time.Second)).UnixNano())
+		chManager.stateTimer.startOne(datapb.ChannelWatchState_ToRelease, "channel-1", 1, Params.DataCoordCfg.WatchTimeoutInterval.GetAsDuration(time.Second))
 
 		err = chManager.DeleteNode(1)
 		assert.NoError(t, err)
@@ -755,8 +755,7 @@ func TestChannelManager_Reload(t *testing.T) {
 				CollectionID: collectionID,
 				ChannelName:  channelName,
 			},
-			State:     state,
-			TimeoutTs: time.Now().Add(20 * time.Second).UnixNano(),
+			State: state,
 		}
 	}
 
@@ -773,7 +772,7 @@ func TestChannelManager_Reload(t *testing.T) {
 			require.NoError(t, err)
 
 			chManager.checkOldNodes([]UniqueID{nodeID})
-			_, ok := chManager.stateTimer.runningTimers.Load(channelName)
+			_, ok := chManager.stateTimer.runningTimerStops.Load(channelName)
 			assert.True(t, ok)
 			chManager.stateTimer.removeTimers([]string{channelName})
 		})
@@ -789,7 +788,7 @@ func TestChannelManager_Reload(t *testing.T) {
 			err = chManager.checkOldNodes([]UniqueID{nodeID})
 			assert.NoError(t, err)
 
-			_, ok := chManager.stateTimer.runningTimers.Load(channelName)
+			_, ok := chManager.stateTimer.runningTimerStops.Load(channelName)
 			assert.True(t, ok)
 			chManager.stateTimer.removeTimers([]string{channelName})
 		})

internal/datacoord/policy.go

@@ -455,14 +455,14 @@ func BgCheckWithMaxWatchDuration(kv kv.TxnKV) ChannelBGChecker {
 					return nil, err
 				}
 				reviseVChannelInfo(watchInfo.GetVchan())
-				// if a channel is not watched after maxWatchDuration,
+				// if a channel is not watched or update watch progress after WatchTimeoutInterval,
 				// then we reallocate it to another node
 				if watchInfo.State == datapb.ChannelWatchState_Complete || watchInfo.State == datapb.ChannelWatchState_WatchSuccess {
 					continue
 				}
 				startTime := time.Unix(watchInfo.StartTs, 0)
 				d := ts.Sub(startTime)
-				if d >= Params.DataCoordCfg.MaxWatchDuration.GetAsDuration(time.Second) {
+				if d >= Params.DataCoordCfg.WatchTimeoutInterval.GetAsDuration(time.Second) {
 					cinfo.Channels = append(cinfo.Channels, c)
 				}
 			}

internal/datacoord/policy_test.go

@@ -402,7 +402,7 @@ func TestBgCheckWithMaxWatchDuration(t *testing.T) {
 				getKv([]*watch{{1, "chan1", &datapb.ChannelWatchInfo{StartTs: ts.Unix(), State: datapb.ChannelWatchState_Uncomplete}},
 					{1, "chan2", &datapb.ChannelWatchInfo{StartTs: ts.Unix(), State: datapb.ChannelWatchState_Complete}}}),
 				[]*NodeChannelInfo{{1, []*channel{{Name: "chan1", CollectionID: 1}, {Name: "chan2", CollectionID: 1}}}},
-				ts.Add(Params.DataCoordCfg.MaxWatchDuration.GetAsDuration(time.Second)),
+				ts.Add(Params.DataCoordCfg.WatchTimeoutInterval.GetAsDuration(time.Second)),
 			},
 			[]*NodeChannelInfo{{1, []*channel{{Name: "chan1", CollectionID: 1}}}},
 			nil,
@@ -412,7 +412,7 @@ func TestBgCheckWithMaxWatchDuration(t *testing.T) {
 			args{
 				getKv([]*watch{{1, "chan1", &datapb.ChannelWatchInfo{StartTs: ts.Unix(), State: datapb.ChannelWatchState_Uncomplete}}}),
 				[]*NodeChannelInfo{{1, []*channel{{Name: "chan1", CollectionID: 1}}}},
-				ts.Add(Params.DataCoordCfg.MaxWatchDuration.GetAsDuration(time.Second)).Add(-time.Second),
+				ts.Add(Params.DataCoordCfg.WatchTimeoutInterval.GetAsDuration(time.Second)).Add(-time.Second),
 			},
 			[]*NodeChannelInfo{},
 			nil,

internal/datanode/data_node.go

@@ -363,6 +363,11 @@ func (node *DataNode) handleWatchInfo(e *event, key string, data []byte) {
 			return
 		}
 
+		if watchInfo.Progress != 0 {
+			log.Info("DataNode received a PUT event with tickler update progress", zap.String("channel", watchInfo.Vchan.ChannelName), zap.Int64("version", e.version))
+			return
+		}
+
 		e.info = watchInfo
 		e.vChanName = watchInfo.GetVchan().GetChannelName()
 		log.Info("DataNode is handling watchInfo PUT event", zap.String("key", key), zap.Any("watch state", watchInfo.GetState().String()))
@@ -410,9 +415,13 @@ func parseDeleteEventKey(key string) string {
 
 func (node *DataNode) handlePutEvent(watchInfo *datapb.ChannelWatchInfo, version int64) (err error) {
 	vChanName := watchInfo.GetVchan().GetChannelName()
+	key := path.Join(Params.CommonCfg.DataCoordWatchSubPath.GetValue(), fmt.Sprintf("%d", node.GetSession().ServerID), vChanName)
+	tickler := newTickler(version, key, watchInfo, node.watchKv, Params.DataNodeCfg.WatchEventTicklerInterval.GetAsDuration(time.Second))
+
 	switch watchInfo.State {
 	case datapb.ChannelWatchState_Uncomplete, datapb.ChannelWatchState_ToWatch:
-		if err := node.flowgraphManager.addAndStart(node, watchInfo.GetVchan(), watchInfo.GetSchema()); err != nil {
+		if err := node.flowgraphManager.addAndStart(node, watchInfo.GetVchan(), watchInfo.GetSchema(), tickler); err != nil {
+			watchInfo.State = datapb.ChannelWatchState_WatchFailure
 			return fmt.Errorf("fail to add and start flowgraph for vChanName: %s, err: %v", vChanName, err)
 		}
 		log.Info("handle put event: new data sync service success", zap.String("vChanName", vChanName))
@@ -429,10 +438,8 @@ func (node *DataNode) handlePutEvent(watchInfo *datapb.ChannelWatchInfo, version
 		return fmt.Errorf("fail to marshal watchInfo with state, vChanName: %s, state: %s ,err: %w", vChanName, watchInfo.State.String(), err)
 	}
 
-	key := path.Join(Params.CommonCfg.DataCoordWatchSubPath.GetValue(), fmt.Sprintf("%d", node.GetSession().ServerID), vChanName)
-
-	success, err := node.watchKv.CompareVersionAndSwap(key, version, string(v))
-	// etcd error, retrying
+	success, err := node.watchKv.CompareVersionAndSwap(key, tickler.version, string(v))
+	// etcd error
 	if err != nil {
 		// flow graph will leak if not release, causing new datanode failed to subscribe
 		node.tryToReleaseFlowgraph(vChanName)

internal/datanode/data_node_test.go

@@ -202,7 +202,7 @@ func TestDataNode(t *testing.T) {
 
 		for i, test := range testDataSyncs {
 			if i <= 2 {
-				err = node.flowgraphManager.addAndStart(node, &datapb.VchannelInfo{CollectionID: 1, ChannelName: test.dmChannelName}, nil)
+				err = node.flowgraphManager.addAndStart(node, &datapb.VchannelInfo{CollectionID: 1, ChannelName: test.dmChannelName}, nil, genTestTickler())
 				assert.Nil(t, err)
 				vchanNameCh <- test.dmChannelName
 			}
@@ -273,9 +273,8 @@ func TestWatchChannel(t *testing.T) {
 			UnflushedSegmentIds: []int64{},
 		}
 		info := &datapb.ChannelWatchInfo{
-			State:     datapb.ChannelWatchState_ToWatch,
-			Vchan:     vchan,
-			TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
+			State: datapb.ChannelWatchState_ToWatch,
+			Vchan: vchan,
 		}
 		val, err := proto.Marshal(info)
 		assert.Nil(t, err)
@@ -332,9 +331,8 @@ func TestWatchChannel(t *testing.T) {
 			UnflushedSegmentIds: []int64{},
 		}
 		info := &datapb.ChannelWatchInfo{
-			State:     datapb.ChannelWatchState_ToRelease,
-			Vchan:     vchan,
-			TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
+			State: datapb.ChannelWatchState_ToRelease,
+			Vchan: vchan,
 		}
 		val, err := proto.Marshal(info)
 		assert.Nil(t, err)
@@ -396,9 +394,8 @@ func TestWatchChannel(t *testing.T) {
 		m.Run()
 
 		info = datapb.ChannelWatchInfo{
-			Vchan:     &datapb.VchannelInfo{ChannelName: ch},
-			State:     datapb.ChannelWatchState_Uncomplete,
-			TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
+			Vchan: &datapb.VchannelInfo{ChannelName: ch},
+			State: datapb.ChannelWatchState_Uncomplete,
 		}
 		bs, err = proto.Marshal(&info)
 		assert.NoError(t, err)
@@ -437,9 +434,8 @@ func TestWatchChannel(t *testing.T) {
 		}
 
 		info := datapb.ChannelWatchInfo{
-			Vchan:     &datapb.VchannelInfo{ChannelName: ch},
-			State:     datapb.ChannelWatchState_Uncomplete,
-			TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
+			Vchan: &datapb.VchannelInfo{ChannelName: ch},
+			State: datapb.ChannelWatchState_Uncomplete,
 		}
 		bs, err := proto.Marshal(&info)
 		assert.NoError(t, err)
@@ -460,8 +456,7 @@ func TestWatchChannel(t *testing.T) {
 				DroppedSegments:     []*datapb.SegmentInfo{{ID: 3}},
 				UnflushedSegmentIds: []int64{1},
 			},
-			State:     datapb.ChannelWatchState_Uncomplete,
-			TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
+			State: datapb.ChannelWatchState_Uncomplete,
 		}
 		bs, err := proto.Marshal(&info)
 		assert.NoError(t, err)

internal/datanode/data_sync_service.go

@@ -25,6 +25,7 @@ import (
 	"go.uber.org/zap"
 
 	"github.com/milvus-io/milvus-proto/go-api/commonpb"
+	"github.com/milvus-io/milvus/internal/kv"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/metrics"
 	"github.com/milvus-io/milvus/internal/mq/msgdispatcher"
@@ -63,6 +64,7 @@ type dataSyncService struct {
 	chunkManager     storage.ChunkManager
 	compactor        *compactionExecutor // reference to compaction executor
 
+	kv            kv.MetaKv
 	serverID      int64
 	stopOnce      sync.Once
 	flushListener chan *segmentFlushPack // chan to listen flush event
@@ -81,6 +83,7 @@ func newDataSyncService(ctx context.Context,
 	flushingSegCache *Cache,
 	chunkManager storage.ChunkManager,
 	compactor *compactionExecutor,
+	tickler *tickler,
 	serverID int64,
 ) (*dataSyncService, error) {
 
@@ -117,7 +120,7 @@ func newDataSyncService(ctx context.Context,
 		serverID:         serverID,
 	}
 
-	if err := service.initNodes(vchan); err != nil {
+	if err := service.initNodes(vchan, tickler); err != nil {
 		return nil, err
 	}
 	return service, nil
@@ -179,7 +182,7 @@ func (dsService *dataSyncService) clearGlobalFlushingCache() {
 }
 
 // initNodes inits a TimetickedFlowGraph
-func (dsService *dataSyncService) initNodes(vchanInfo *datapb.VchannelInfo) error {
+func (dsService *dataSyncService) initNodes(vchanInfo *datapb.VchannelInfo, tickler *tickler) error {
 	dsService.fg = flowgraph.NewTimeTickedFlowGraph(dsService.ctx)
 	// initialize flush manager for DataSync Service
 	dsService.flushManager = NewRendezvousFlushManager(dsService.idAllocator, dsService.chunkManager, dsService.channel,
@@ -235,6 +238,7 @@ func (dsService *dataSyncService) initNodes(vchanInfo *datapb.VchannelInfo) erro
 				recoverTs:    vchanInfo.GetSeekPosition().GetTimestamp()}); err != nil {
 				return nil, err
 			}
+			tickler.inc()
 			return nil, nil
 		})
 		futures = append(futures, future)
@@ -270,11 +274,16 @@ func (dsService *dataSyncService) initNodes(vchanInfo *datapb.VchannelInfo) erro
 			}); err != nil {
 				return nil, err
 			}
+			tickler.inc()
 			return nil, nil
 		})
 		futures = append(futures, future)
 	}
 
+	//tickler will update addSegment progress to watchInfo
+	tickler.watch()
+	defer tickler.stop()
+
 	err = concurrency.AwaitAll(futures...)
 	if err != nil {
 		return err

internal/datanode/data_sync_service_test.go

@@ -181,6 +181,7 @@ func TestDataSyncService_newDataSyncService(te *testing.T) {
 				newCache(),
 				cm,
 				newCompactionExecutor(),
+				genTestTickler(),
 				0,
 			)
 
@@ -279,7 +280,7 @@ func TestDataSyncService_Start(t *testing.T) {
 		},
 	}
 
-	sync, err := newDataSyncService(ctx, flushChan, resendTTChan, channel, allocFactory, dispClient, factory, vchan, signalCh, dataCoord, newCache(), cm, newCompactionExecutor(), 0)
+	sync, err := newDataSyncService(ctx, flushChan, resendTTChan, channel, allocFactory, dispClient, factory, vchan, signalCh, dataCoord, newCache(), cm, newCompactionExecutor(), genTestTickler(), 0)
 	assert.Nil(t, err)
 
 	sync.flushListener = make(chan *segmentFlushPack)
@@ -431,7 +432,7 @@ func TestDataSyncService_Close(t *testing.T) {
 	paramtable.Get().Reset(Params.DataNodeCfg.FlushInsertBufferSize.Key)
 
 	channel := newChannel(insertChannelName, collMeta.ID, collMeta.GetSchema(), mockRootCoord, cm)
-	sync, err := newDataSyncService(ctx, flushChan, resendTTChan, channel, allocFactory, dispClient, factory, vchan, signalCh, mockDataCoord, newCache(), cm, newCompactionExecutor(), 0)
+	sync, err := newDataSyncService(ctx, flushChan, resendTTChan, channel, allocFactory, dispClient, factory, vchan, signalCh, mockDataCoord, newCache(), cm, newCompactionExecutor(), genTestTickler(), 0)
 	assert.Nil(t, err)
 
 	sync.flushListener = make(chan *segmentFlushPack, 10)

internal/datanode/event_manager.go

@@ -20,9 +20,11 @@ import (
 	"sync"
 	"time"
 
+	"github.com/golang/protobuf/proto"
+	"github.com/milvus-io/milvus/internal/kv"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
-
+	"go.uber.org/atomic"
 	"go.uber.org/zap"
 )
 
@@ -67,7 +69,7 @@ func (e *channelEventManager) Run() {
 			case event := <-e.eventChan:
 				switch event.eventType {
 				case putEventType:
-					e.retryHandlePutEvent(event)
+					e.handlePutEvent(event.info, event.version)
 				case deleteEventType:
 					e.handleDeleteEvent(event.vChanName)
 				}
@@ -78,65 +80,6 @@ func (e *channelEventManager) Run() {
 	}()
 }
 
-func (e *channelEventManager) retryHandlePutEvent(event event) {
-	countdown := time.Until(time.Unix(0, event.info.TimeoutTs))
-	if countdown < 0 {
-		log.Warn("event already timed out", zap.String("vChanName", event.vChanName))
-		return
-	}
-	// Trigger retry for-loop when fail to handle put event for the first time
-	if err := e.handlePutEvent(event.info, event.version); err != nil {
-		timer := time.NewTimer(countdown)
-		defer timer.Stop()
-		ticker := time.NewTicker(e.retryInterval)
-		defer ticker.Stop()
-		for {
-			log.Warn("handle put event fail, starting retry",
-				zap.String("vChanName", event.vChanName),
-				zap.String("retry interval", e.retryInterval.String()),
-				zap.Error(err))
-
-			// reset the ticker
-			ticker.Reset(e.retryInterval)
-
-			select {
-			case <-ticker.C:
-				// ticker notify, do another retry
-			case <-timer.C:
-				// timeout
-				log.Warn("event process timed out", zap.String("vChanName", event.vChanName))
-				return
-			case evt, ok := <-e.eventChan:
-				if !ok {
-					log.Warn("event channel closed", zap.String("vChanName", event.vChanName))
-					return
-				}
-				// When got another put event, overwrite current event
-				if evt.eventType == putEventType {
-					// handles only Uncomplete, ToWatch and ToRelease
-					if isEndWatchState(evt.info.State) {
-						return
-					}
-					event = evt
-				}
-				// When getting a delete event at next retry, exit retry loop
-				// When getting a put event, just continue the retry
-				if evt.eventType == deleteEventType {
-					log.Warn("delete event triggerred, terminating retry.",
-						zap.String("vChanName", event.vChanName))
-					e.handleDeleteEvent(evt.vChanName)
-					return
-				}
-			}
-			err = e.handlePutEvent(event.info, event.version)
-			if err == nil {
-				log.Info("handle put event successfully", zap.String("vChanName", event.vChanName))
-				return
-			}
-		}
-	}
-}
-
 func (e *channelEventManager) handleEvent(event event) {
 	e.eventChan <- event
 }
@@ -152,3 +95,88 @@ func isEndWatchState(state datapb.ChannelWatchState) bool {
 		state != datapb.ChannelWatchState_ToRelease && // start release
 		state != datapb.ChannelWatchState_Uncomplete // legacy state, equal to ToWatch
 }
+
+type tickler struct {
+	progress *atomic.Int32
+	version  int64
+
+	kv        kv.MetaKv
+	path      string
+	watchInfo *datapb.ChannelWatchInfo
+
+	interval time.Duration
+	closeCh  chan struct{}
+	closeWg  sync.WaitGroup
+}
+
+func (t *tickler) inc() {
+	t.progress.Inc()
+}
+
+func (t *tickler) watch() {
+	if t.interval == 0 {
+		log.Info("zero interval, close ticler watch",
+			zap.String("channel name", t.watchInfo.GetVchan().GetChannelName()),
+		)
+		return
+	}
+
+	t.closeWg.Add(1)
+	ticker := time.NewTicker(t.interval)
+	go func() {
+		for {
+			select {
+			case <-ticker.C:
+				nowProgress := t.progress.Load()
+				if t.watchInfo.Progress == nowProgress {
+					continue
+				}
+
+				t.watchInfo.Progress = nowProgress
+				v, err := proto.Marshal(t.watchInfo)
+				if err != nil {
+					log.Error("fail to marshal watchInfo with progress at tickler",
+						zap.String("vChanName", t.watchInfo.Vchan.ChannelName),
+						zap.Int32("progree", nowProgress),
+						zap.Error(err))
+					return
+				}
+				success, err := t.kv.CompareVersionAndSwap(t.path, t.version, string(v))
+				if err != nil {
+					log.Error("tickler update failed", zap.Error(err))
+					continue
+				}
+
+				if !success {
+					log.Error("tickler update failed: failed to compare version and swap",
+						zap.String("key", t.path), zap.Int32("progress", nowProgress), zap.Int64("version", t.version),
+						zap.String("vChanName", t.watchInfo.GetVchan().ChannelName))
+					return
+				}
+				log.Debug("tickler update success", zap.Int32("progress", nowProgress), zap.Int64("version", t.version),
+					zap.String("vChanName", t.watchInfo.GetVchan().ChannelName))
+				t.version++
+			case <-t.closeCh:
+				t.closeWg.Done()
+				return
+			}
+		}
+	}()
+}
+
+func (t *tickler) stop() {
+	close(t.closeCh)
+	t.closeWg.Wait()
+}
+
+func newTickler(version int64, path string, watchInfo *datapb.ChannelWatchInfo, kv kv.MetaKv, interval time.Duration) *tickler {
+	return &tickler{
+		progress:  atomic.NewInt32(0),
+		path:      path,
+		kv:        kv,
+		watchInfo: watchInfo,
+		version:   version,
+		interval:  interval,
+		closeCh:   make(chan struct{}),
+	}
+}

internal/datanode/event_manager_test.go

@@ -18,12 +18,14 @@ package datanode
 
 import (
 	"errors"
+	"fmt"
+	"path"
 	"testing"
 	"time"
 
+	"github.com/golang/protobuf/proto"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/stretchr/testify/assert"
-	"go.uber.org/atomic"
 )
 
 func TestChannelEventManager(t *testing.T) {
@@ -41,97 +43,12 @@ func TestChannelEventManager(t *testing.T) {
 			eventType: putEventType,
 			vChanName: "",
 			version:   0,
-			info: &datapb.ChannelWatchInfo{
-				TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
-			},
+			info:      &datapb.ChannelWatchInfo{},
 		})
 		<-ch
 		assert.True(t, ran)
 	})
 
-	t.Run("event already timeout", func(t *testing.T) {
-		ch := make(chan struct{}, 1)
-		ran := false
-		em := newChannelEventManager(func(info *datapb.ChannelWatchInfo, version int64) error {
-			ran = true
-			ch <- struct{}{}
-			return nil
-		}, func(name string) {}, time.Millisecond*10)
-
-		em.Run()
-		em.handleEvent(event{
-			eventType: putEventType,
-			vChanName: "",
-			version:   0,
-			info: &datapb.ChannelWatchInfo{
-				TimeoutTs: time.Now().Add(-time.Minute).UnixNano(),
-			},
-		})
-		select {
-		case <-ch:
-			t.FailNow()
-		case <-time.NewTimer(time.Millisecond * 100).C:
-		}
-		assert.False(t, ran)
-	})
-
-	t.Run("retry success", func(t *testing.T) {
-		ch := make(chan struct{}, 1)
-		ran := false
-		counter := atomic.Int32{}
-		counter.Store(0)
-		em := newChannelEventManager(func(info *datapb.ChannelWatchInfo, version int64) error {
-			current := counter.Add(1)
-			if current == 2 {
-				ran = true
-				ch <- struct{}{}
-				return nil
-			}
-
-			return errors.New("mocked error")
-		}, func(name string) {}, time.Millisecond*10)
-
-		em.Run()
-		em.handleEvent(event{
-			eventType: putEventType,
-			vChanName: "",
-			version:   0,
-			info: &datapb.ChannelWatchInfo{
-				TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
-			},
-		})
-		<-ch
-		assert.True(t, ran)
-	})
-
-	t.Run("retry until timeout", func(t *testing.T) {
-		em := newChannelEventManager(func(info *datapb.ChannelWatchInfo, version int64) error {
-			return errors.New("mocked error")
-		}, func(name string) {}, time.Millisecond*100)
-
-		ch := make(chan struct{}, 1)
-
-		go func() {
-			ddl := time.Now().Add(time.Millisecond * 50)
-			evt := event{
-				eventType: putEventType,
-				vChanName: "",
-				version:   0,
-				info: &datapb.ChannelWatchInfo{
-					TimeoutTs: ddl.UnixNano(),
-				},
-			}
-			em.retryHandlePutEvent(evt)
-			ch <- struct{}{}
-		}()
-
-		select {
-		case <-ch:
-		case <-time.NewTimer(time.Second).C:
-			t.FailNow()
-		}
-	})
-
 	t.Run("close behavior", func(t *testing.T) {
 		ch := make(chan struct{}, 1)
 		em := newChannelEventManager(func(info *datapb.ChannelWatchInfo, version int64) error {
@@ -139,25 +56,22 @@ func TestChannelEventManager(t *testing.T) {
 		}, func(name string) {}, time.Millisecond*10)
 
 		go func() {
-			ddl := time.Now().Add(time.Minute)
 			evt := event{
 				eventType: putEventType,
 				vChanName: "",
 				version:   0,
-				info: &datapb.ChannelWatchInfo{
-					TimeoutTs: ddl.UnixNano(),
-				},
+				info:      &datapb.ChannelWatchInfo{},
 			}
-			em.retryHandlePutEvent(evt)
+			em.handleEvent(evt)
 			ch <- struct{}{}
 		}()
 
-		close(em.eventChan)
 		select {
 		case <-ch:
 		case <-time.NewTimer(time.Second).C:
 			t.FailNow()
 		}
+		close(em.eventChan)
 
 		assert.NotPanics(t, func() {
 			em.Close()
@@ -183,17 +97,13 @@ func TestChannelEventManager(t *testing.T) {
 			eventType: putEventType,
 			vChanName: "",
 			version:   0,
-			info: &datapb.ChannelWatchInfo{
-				TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
-			},
+			info:      &datapb.ChannelWatchInfo{},
 		})
 		em.handleEvent(event{
 			eventType: deleteEventType,
 			vChanName: "",
 			version:   0,
-			info: &datapb.ChannelWatchInfo{
-				TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
-			},
+			info:      &datapb.ChannelWatchInfo{},
 		})
 		<-ch
 		assert.True(t, ran)
@@ -219,8 +129,7 @@ func TestChannelEventManager(t *testing.T) {
 			vChanName: "",
 			version:   0,
 			info: &datapb.ChannelWatchInfo{
-				State:     datapb.ChannelWatchState_ToWatch,
-				TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
+				State: datapb.ChannelWatchState_ToWatch,
 			},
 		})
 		em.handleEvent(event{
@@ -228,62 +137,72 @@ func TestChannelEventManager(t *testing.T) {
 			vChanName: "",
 			version:   1,
 			info: &datapb.ChannelWatchInfo{
-				State:     datapb.ChannelWatchState_ToWatch,
-				TimeoutTs: time.Now().Add(time.Minute).UnixNano(),
+				State: datapb.ChannelWatchState_ToWatch,
 			},
 		})
 		<-ch
 		assert.True(t, ran)
 	})
-
-	t.Run("canceled by EndStates", func(t *testing.T) {
-		endStates := []datapb.ChannelWatchState{
-			datapb.ChannelWatchState_Complete,
-			datapb.ChannelWatchState_WatchSuccess,
-			datapb.ChannelWatchState_WatchFailure,
-			datapb.ChannelWatchState_ReleaseSuccess,
-			datapb.ChannelWatchState_ReleaseFailure,
-		}
-
-		for _, es := range endStates {
-			em := newChannelEventManager(
-				func(info *datapb.ChannelWatchInfo, version int64) error {
-					return errors.New("mocked error")
-				},
-				func(name string) {},
-				time.Millisecond*100,
-			)
-
-			ch := make(chan struct{}, 1)
-			ddl := time.Now().Add(time.Minute)
-
-			go func() {
-				evt := event{
-					eventType: putEventType,
-					vChanName: "",
-					version:   0,
-					info: &datapb.ChannelWatchInfo{
-						TimeoutTs: ddl.UnixNano(),
-					},
-				}
-				em.retryHandlePutEvent(evt)
-				ch <- struct{}{}
-			}()
-
-			em.eventChan <- event{
-				eventType: putEventType,
-				vChanName: "",
-				version:   0,
-				info: &datapb.ChannelWatchInfo{
-					State:     es,
-					TimeoutTs: ddl.UnixNano(),
-				},
-			}
-			select {
-			case <-ch:
-			case <-time.NewTimer(time.Minute).C:
-				t.FailNow()
-			}
-		}
-	})
+}
+
+func parseWatchInfo(key string, data []byte) (*datapb.ChannelWatchInfo, error) {
+	watchInfo := datapb.ChannelWatchInfo{}
+	if err := proto.Unmarshal(data, &watchInfo); err != nil {
+		return nil, fmt.Errorf("invalid event data: fail to parse ChannelWatchInfo, key: %s, err: %v", key, err)
+
+	}
+
+	if watchInfo.Vchan == nil {
+		return nil, fmt.Errorf("invalid event: ChannelWatchInfo with nil VChannelInfo, key: %s", key)
+	}
+	reviseVChannelInfo(watchInfo.GetVchan())
+
+	return &watchInfo, nil
+}
+
+func TestEventTickler(t *testing.T) {
+	channelName := "test-channel"
+	etcdPrefix := "test_path"
+
+	kv, err := newTestEtcdKV()
+	assert.NoError(t, err)
+	kv.RemoveWithPrefix(etcdPrefix)
+	defer kv.RemoveWithPrefix(etcdPrefix)
+
+	tickler := newTickler(0, path.Join(etcdPrefix, channelName), &datapb.ChannelWatchInfo{
+		Vchan: &datapb.VchannelInfo{
+			ChannelName: channelName,
+		},
+	}, kv, 100*time.Millisecond)
+	defer tickler.stop()
+	endCh := make(chan struct{}, 1)
+	go func() {
+		watchCh := kv.WatchWithPrefix(etcdPrefix)
+		for {
+			event, ok := <-watchCh
+			assert.True(t, ok)
+			for _, evt := range event.Events {
+				key := string(evt.Kv.Key)
+				watchInfo, err := parseWatchInfo(key, evt.Kv.Value)
+				assert.NoError(t, err)
+				if watchInfo.GetVchan().GetChannelName() == channelName {
+					assert.Equal(t, int32(1), watchInfo.Progress)
+					endCh <- struct{}{}
+					return
+				}
+			}
+		}
+
+	}()
+
+	tickler.inc()
+	tickler.watch()
+	assert.Eventually(t, func() bool {
+		select {
+		case <-endCh:
+			return true
+		default:
+			return false
+		}
+	}, 4*time.Second, 100*time.Millisecond)
 }

internal/datanode/flow_graph_manager.go

@@ -37,7 +37,7 @@ func newFlowgraphManager() *flowgraphManager {
 	return &flowgraphManager{}
 }
 
-func (fm *flowgraphManager) addAndStart(dn *DataNode, vchan *datapb.VchannelInfo, schema *schemapb.CollectionSchema) error {
+func (fm *flowgraphManager) addAndStart(dn *DataNode, vchan *datapb.VchannelInfo, schema *schemapb.CollectionSchema, tickler *tickler) error {
 	if _, ok := fm.flowgraphs.Load(vchan.GetChannelName()); ok {
 		log.Warn("try to add an existed DataSyncService", zap.String("vChannelName", vchan.GetChannelName()))
 		return nil
@@ -48,7 +48,7 @@ func (fm *flowgraphManager) addAndStart(dn *DataNode, vchan *datapb.VchannelInfo
 	var alloc allocatorInterface = newAllocator(dn.rootCoord)
 
 	dataSyncService, err := newDataSyncService(dn.ctx, make(chan flushMsg, 100), make(chan resendTTMsg, 100), channel,
-		alloc, dn.dispClient, dn.factory, vchan, dn.clearSignal, dn.dataCoord, dn.segmentCache, dn.chunkManager, dn.compactionExecutor, dn.GetSession().ServerID)
+		alloc, dn.dispClient, dn.factory, vchan, dn.clearSignal, dn.dataCoord, dn.segmentCache, dn.chunkManager, dn.compactionExecutor, tickler, dn.GetSession().ServerID)
 	if err != nil {
 		log.Warn("new data sync service fail", zap.String("vChannelName", vchan.GetChannelName()), zap.Error(err))
 		return err

internal/datanode/flow_graph_manager_test.go

@@ -64,7 +64,7 @@ func TestFlowGraphManager(t *testing.T) {
 		}
 		require.False(t, fm.exist(vchanName))
 
-		err := fm.addAndStart(node, vchan, nil)
+		err := fm.addAndStart(node, vchan, nil, genTestTickler())
 		assert.NoError(t, err)
 		assert.True(t, fm.exist(vchanName))
 
@@ -79,7 +79,7 @@ func TestFlowGraphManager(t *testing.T) {
 		}
 		require.False(t, fm.exist(vchanName))
 
-		err := fm.addAndStart(node, vchan, nil)
+		err := fm.addAndStart(node, vchan, nil, genTestTickler())
 		assert.NoError(t, err)
 		assert.True(t, fm.exist(vchanName))
 
@@ -97,7 +97,7 @@ func TestFlowGraphManager(t *testing.T) {
 		}
 		require.False(t, fm.exist(vchanName))
 
-		err := fm.addAndStart(node, vchan, nil)
+		err := fm.addAndStart(node, vchan, nil, genTestTickler())
 		assert.NoError(t, err)
 		assert.True(t, fm.exist(vchanName))
 		fg, ok := fm.getFlowgraphService(vchanName)
@@ -145,7 +145,7 @@ func TestFlowGraphManager(t *testing.T) {
 		}
 		require.False(t, fm.exist(vchanName))
 
-		err := fm.addAndStart(node, vchan, nil)
+		err := fm.addAndStart(node, vchan, nil, genTestTickler())
 		assert.NoError(t, err)
 		assert.True(t, fm.exist(vchanName))
 

internal/datanode/mock_test.go

@@ -33,6 +33,7 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
 	"github.com/milvus-io/milvus-proto/go-api/schemapb"
 	"github.com/milvus-io/milvus/internal/common"
+	"github.com/milvus-io/milvus/internal/kv"
 	etcdkv "github.com/milvus-io/milvus/internal/kv/etcd"
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/mq/msgdispatcher"
@@ -136,6 +137,22 @@ func makeNewChannelNames(names []string, suffix string) []string {
 	return ret
 }
 
+func newTestEtcdKV() (kv.MetaKv, error) {
+	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())
+	if err != nil {
+		return nil, err
+	}
+
+	return etcdkv.NewEtcdKV(etcdCli, Params.EtcdCfg.MetaRootPath.GetValue()), nil
+}
+
 func clearEtcd(rootPath string) error {
 	client, err := etcd.GetEtcdClient(
 		Params.EtcdCfg.UseEmbedEtcd.GetAsBool(),
@@ -1293,3 +1310,7 @@ func genTimestamp() typeutil.Timestamp {
 	gb := time.Date(2009, time.Month(11), 10, 23, 0, 0, 0, time.UTC)
 	return tsoutil.ComposeTSByTime(gb, 0)
 }
+
+func genTestTickler() *tickler {
+	return newTickler(0, "", nil, nil, 0)
+}

internal/datanode/services_test.go

@@ -185,7 +185,7 @@ func (s *DataNodeServicesSuite) TestFlushSegments() {
 		FlushedSegmentIds:   []int64{},
 	}
 
-	err := s.node.flowgraphManager.addAndStart(s.node, vchan, nil)
+	err := s.node.flowgraphManager.addAndStart(s.node, vchan, nil, genTestTickler())
 	s.Require().NoError(err)
 
 	fgservice, ok := s.node.flowgraphManager.getFlowgraphService(dmChannelName)
@@ -391,14 +391,14 @@ func (s *DataNodeServicesSuite) TestImport() {
 			ChannelName:         chName1,
 			UnflushedSegmentIds: []int64{},
 			FlushedSegmentIds:   []int64{},
-		}, nil)
+		}, nil, genTestTickler())
 		s.Require().Nil(err)
 		err = s.node.flowgraphManager.addAndStart(s.node, &datapb.VchannelInfo{
 			CollectionID:        100,
 			ChannelName:         chName2,
 			UnflushedSegmentIds: []int64{},
 			FlushedSegmentIds:   []int64{},
-		}, nil)
+		}, nil, genTestTickler())
 		s.Require().Nil(err)
 
 		_, ok := s.node.flowgraphManager.getFlowgraphService(chName1)
@@ -452,14 +452,14 @@ func (s *DataNodeServicesSuite) TestImport() {
 			ChannelName:         chName1,
 			UnflushedSegmentIds: []int64{},
 			FlushedSegmentIds:   []int64{},
-		}, nil)
+		}, nil, genTestTickler())
 		s.Require().Nil(err)
 		err = s.node.flowgraphManager.addAndStart(s.node, &datapb.VchannelInfo{
 			CollectionID:        999, // wrong collection ID.
 			ChannelName:         chName2,
 			UnflushedSegmentIds: []int64{},
 			FlushedSegmentIds:   []int64{},
-		}, nil)
+		}, nil, genTestTickler())
 		s.Require().Nil(err)
 
 		_, ok := s.node.flowgraphManager.getFlowgraphService(chName1)
@@ -564,14 +564,14 @@ func (s *DataNodeServicesSuite) TestAddImportSegment() {
 			ChannelName:         chName1,
 			UnflushedSegmentIds: []int64{},
 			FlushedSegmentIds:   []int64{},
-		}, nil)
+		}, nil, genTestTickler())
 		s.Require().NoError(err)
 		err = s.node.flowgraphManager.addAndStart(s.node, &datapb.VchannelInfo{
 			CollectionID:        100,
 			ChannelName:         chName2,
 			UnflushedSegmentIds: []int64{},
 			FlushedSegmentIds:   []int64{},
-		}, nil)
+		}, nil, genTestTickler())
 		s.Require().NoError(err)
 
 		_, ok := s.node.flowgraphManager.getFlowgraphService(chName1)
@@ -612,7 +612,7 @@ func (s *DataNodeServicesSuite) TestSyncSegments() {
 		ChannelName:         chanName,
 		UnflushedSegmentIds: []int64{},
 		FlushedSegmentIds:   []int64{100, 200, 300},
-	}, nil)
+	}, nil, genTestTickler())
 	s.Require().NoError(err)
 	fg, ok := s.node.flowgraphManager.getFlowgraphService(chanName)
 	s.Assert().True(ok)
@@ -696,7 +696,7 @@ func (s *DataNodeServicesSuite) TestResendSegmentStats() {
 		FlushedSegmentIds:   []int64{},
 	}
 
-	err := s.node.flowgraphManager.addAndStart(s.node, vChan, nil)
+	err := s.node.flowgraphManager.addAndStart(s.node, vChan, nil, genTestTickler())
 	s.Require().Nil(err)
 
 	fgService, ok := s.node.flowgraphManager.getFlowgraphService(dmChannelName)

internal/proto/data_coord.proto

@@ -413,10 +413,12 @@ message ChannelWatchInfo {
     int64 startTs = 2;
     ChannelWatchState state = 3;
     // the timeout ts, datanode shall do nothing after it
-    // if the timeout is not set(= 0), original infinite retry logic shall be applied
+    // NOT USED.
     int64 timeoutTs = 4;
     // the schema of the collection to watch, to avoid get schema rpc issues.
     schema.CollectionSchema schema = 5;
+    // watch progress
+    int32 progress = 6;
 }
 
 enum CompactionType {

internal/proto/datapb/data_coord.pb.go

@@ -2757,13 +2757,15 @@ type ChannelWatchInfo struct {
 	StartTs int64             `protobuf:"varint,2,opt,name=startTs,proto3" json:"startTs,omitempty"`
 	State   ChannelWatchState `protobuf:"varint,3,opt,name=state,proto3,enum=milvus.proto.data.ChannelWatchState" json:"state,omitempty"`
 	// the timeout ts, datanode shall do nothing after it
-	// if the timeout is not set(= 0), original infinite retry logic shall be applied
+	// NOT USED.
 	TimeoutTs int64 `protobuf:"varint,4,opt,name=timeoutTs,proto3" json:"timeoutTs,omitempty"`
 	// the schema of the collection to watch, to avoid get schema rpc issues.
-	Schema               *schemapb.CollectionSchema `protobuf:"bytes,5,opt,name=schema,proto3" json:"schema,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}                   `json:"-"`
-	XXX_unrecognized     []byte                     `json:"-"`
-	XXX_sizecache        int32                      `json:"-"`
+	Schema *schemapb.CollectionSchema `protobuf:"bytes,5,opt,name=schema,proto3" json:"schema,omitempty"`
+	// watch progress
+	Progress             int32    `protobuf:"varint,6,opt,name=progress,proto3" json:"progress,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *ChannelWatchInfo) Reset()         { *m = ChannelWatchInfo{} }
@@ -2826,6 +2828,13 @@ func (m *ChannelWatchInfo) GetSchema() *schemapb.CollectionSchema {
 	return nil
 }
 
+func (m *ChannelWatchInfo) GetProgress() int32 {
+	if m != nil {
+		return m.Progress
+	}
+	return 0
+}
+
 type CompactionStateRequest struct {
 	Base                 *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
@@ -4969,299 +4978,300 @@ func init() {
 func init() { proto.RegisterFile("data_coord.proto", fileDescriptor_82cd95f524594f49) }
 
 var fileDescriptor_82cd95f524594f49 = []byte{
-	// 4667 bytes of a gzipped FileDescriptorProto
+	// 4678 bytes of a gzipped FileDescriptorProto
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+	0xbf, 0xcb, 0x86, 0x7e, 0x60, 0xda, 0xfc, 0xd7, 0x5d, 0x5f, 0xdc, 0xef, 0x52, 0x6c, 0x77, 0x09,
+	0xb6, 0xd1, 0xde, 0x5e, 0x89, 0xb6, 0x3e, 0xfa, 0x9f, 0x00, 0x00, 0x00, 0xff, 0xff, 0x6d, 0xf9,
+	0xa2, 0x18, 0x31, 0x53, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.

internal/util/paramtable/component_param.go

@@ -176,6 +176,7 @@ type commonConfig struct {
 	DataCoordSegmentInfo  ParamItem `refreshable:"true"`
 	DataCoordSubName      ParamItem `refreshable:"false"`
 	DataCoordWatchSubPath ParamItem `refreshable:"false"`
+	DataCoordTicklePath   ParamItem `refreshable:"false"`
 	DataNodeSubName       ParamItem `refreshable:"false"`
 
 	DefaultPartitionName ParamItem `refreshable:"false"`
@@ -366,6 +367,14 @@ func (p *commonConfig) init(base *BaseTable) {
 	}
 	p.DataCoordWatchSubPath.Init(base.mgr)
 
+	p.DataCoordTicklePath = ParamItem{
+		Key:          "msgChannel.subNamePrefix.dataCoordWatchSubPath",
+		Version:      "2.2.3",
+		DefaultValue: "tickle",
+		PanicIfEmpty: true,
+	}
+	p.DataCoordTicklePath.Init(base.mgr)
+
 	p.DataNodeSubName = ParamItem{
 		Key:          "msgChannel.subNamePrefix.dataNodeSubNamePrefix",
 		Version:      "2.1.0",
@@ -1367,7 +1376,7 @@ func (p *queryNodeConfig) init(base *BaseTable) {
 type dataCoordConfig struct {
 
 	// --- CHANNEL ---
-	MaxWatchDuration ParamItem `refreshable:"false"`
+	WatchTimeoutInterval ParamItem `refreshable:"false"`
 
 	// --- SEGMENTS ---
 	SegmentMaxSize                 ParamItem `refreshable:"false"`
@@ -1414,12 +1423,12 @@ type dataCoordConfig struct {
 
 func (p *dataCoordConfig) init(base *BaseTable) {
 
-	p.MaxWatchDuration = ParamItem{
-		Key:          "dataCoord.channel.maxWatchDuration",
-		Version:      "2.2.1",
-		DefaultValue: "600",
+	p.WatchTimeoutInterval = ParamItem{
+		Key:          "dataCoord.channel.watchTimeoutInterval",
+		Version:      "2.2.3",
+		DefaultValue: "30",
 	}
-	p.MaxWatchDuration.Init(base.mgr)
+	p.WatchTimeoutInterval.Init(base.mgr)
 
 	p.SegmentMaxSize = ParamItem{
 		Key:          "dataCoord.segment.maxSize",
@@ -1664,6 +1673,9 @@ type dataNodeConfig struct {
 	BinLogMaxSize          ParamItem `refreshable:"true"`
 	SyncPeriod             ParamItem `refreshable:"true"`
 
+	// watchEvent
+	WatchEventTicklerInterval ParamItem `refreshable:"false"`
+
 	// io concurrency to fetch stats logs
 	IOConcurrency ParamItem `refreshable:"false"`
 }
@@ -1713,6 +1725,13 @@ func (p *dataNodeConfig) init(base *BaseTable) {
 	}
 	p.SyncPeriod.Init(base.mgr)
 
+	p.WatchEventTicklerInterval = ParamItem{
+		Key:          "datanode.segment.watchEventTicklerInterval",
+		Version:      "2.2.3",
+		DefaultValue: "15",
+	}
+	p.WatchEventTicklerInterval.Init(base.mgr)
+
 	p.IOConcurrency = ParamItem{
 		Key:          "dataNode.dataSync.ioConcurrency",
 		Version:      "2.0.0",