diff --git a/go/vt/proto/binlogdata/binlogdata.pb.go b/go/vt/proto/binlogdata/binlogdata.pb.go
index 2683321fd16..87f39855ed3 100644
--- a/go/vt/proto/binlogdata/binlogdata.pb.go
+++ b/go/vt/proto/binlogdata/binlogdata.pb.go
@@ -48,7 +48,7 @@ func (x OnDDLAction) String() string {
 	return proto.EnumName(OnDDLAction_name, int32(x))
 }
 func (OnDDLAction) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{0}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{0}
 }
 
 // VEventType enumerates the event types.
@@ -57,20 +57,21 @@ func (OnDDLAction) EnumDescriptor() ([]byte, []int) {
 type VEventType int32
 
 const (
-	VEventType_UNKNOWN  VEventType = 0
-	VEventType_GTID     VEventType = 1
-	VEventType_BEGIN    VEventType = 2
-	VEventType_COMMIT   VEventType = 3
-	VEventType_ROLLBACK VEventType = 4
-	VEventType_DDL      VEventType = 5
-	VEventType_INSERT   VEventType = 6
-	VEventType_REPLACE  VEventType = 7
-	VEventType_UPDATE   VEventType = 8
-	VEventType_DELETE   VEventType = 9
-	VEventType_SET      VEventType = 10
-	VEventType_OTHER    VEventType = 11
-	VEventType_ROW      VEventType = 12
-	VEventType_FIELD    VEventType = 13
+	VEventType_UNKNOWN   VEventType = 0
+	VEventType_GTID      VEventType = 1
+	VEventType_BEGIN     VEventType = 2
+	VEventType_COMMIT    VEventType = 3
+	VEventType_ROLLBACK  VEventType = 4
+	VEventType_DDL       VEventType = 5
+	VEventType_INSERT    VEventType = 6
+	VEventType_REPLACE   VEventType = 7
+	VEventType_UPDATE    VEventType = 8
+	VEventType_DELETE    VEventType = 9
+	VEventType_SET       VEventType = 10
+	VEventType_OTHER     VEventType = 11
+	VEventType_ROW       VEventType = 12
+	VEventType_FIELD     VEventType = 13
+	VEventType_HEARTBEAT VEventType = 14
 )
 
 var VEventType_name = map[int32]string{
@@ -88,29 +89,31 @@ var VEventType_name = map[int32]string{
 	11: "OTHER",
 	12: "ROW",
 	13: "FIELD",
+	14: "HEARTBEAT",
 }
 var VEventType_value = map[string]int32{
-	"UNKNOWN":  0,
-	"GTID":     1,
-	"BEGIN":    2,
-	"COMMIT":   3,
-	"ROLLBACK": 4,
-	"DDL":      5,
-	"INSERT":   6,
-	"REPLACE":  7,
-	"UPDATE":   8,
-	"DELETE":   9,
-	"SET":      10,
-	"OTHER":    11,
-	"ROW":      12,
-	"FIELD":    13,
+	"UNKNOWN":   0,
+	"GTID":      1,
+	"BEGIN":     2,
+	"COMMIT":    3,
+	"ROLLBACK":  4,
+	"DDL":       5,
+	"INSERT":    6,
+	"REPLACE":   7,
+	"UPDATE":    8,
+	"DELETE":    9,
+	"SET":       10,
+	"OTHER":     11,
+	"ROW":       12,
+	"FIELD":     13,
+	"HEARTBEAT": 14,
 }
 
 func (x VEventType) String() string {
 	return proto.EnumName(VEventType_name, int32(x))
 }
 func (VEventType) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{1}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{1}
 }
 
 type BinlogTransaction_Statement_Category int32
@@ -158,7 +161,7 @@ func (x BinlogTransaction_Statement_Category) String() string {
 	return proto.EnumName(BinlogTransaction_Statement_Category_name, int32(x))
 }
 func (BinlogTransaction_Statement_Category) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{1, 0, 0}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{1, 0, 0}
 }
 
 // Charset is the per-statement charset info from a QUERY_EVENT binlog entry.
@@ -178,7 +181,7 @@ func (m *Charset) Reset()         { *m = Charset{} }
 func (m *Charset) String() string { return proto.CompactTextString(m) }
 func (*Charset) ProtoMessage()    {}
 func (*Charset) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{0}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{0}
 }
 func (m *Charset) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Charset.Unmarshal(m, b)
@@ -235,7 +238,7 @@ func (m *BinlogTransaction) Reset()         { *m = BinlogTransaction{} }
 func (m *BinlogTransaction) String() string { return proto.CompactTextString(m) }
 func (*BinlogTransaction) ProtoMessage()    {}
 func (*BinlogTransaction) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{1}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{1}
 }
 func (m *BinlogTransaction) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_BinlogTransaction.Unmarshal(m, b)
@@ -285,7 +288,7 @@ func (m *BinlogTransaction_Statement) Reset()         { *m = BinlogTransaction_S
 func (m *BinlogTransaction_Statement) String() string { return proto.CompactTextString(m) }
 func (*BinlogTransaction_Statement) ProtoMessage()    {}
 func (*BinlogTransaction_Statement) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{1, 0}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{1, 0}
 }
 func (m *BinlogTransaction_Statement) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_BinlogTransaction_Statement.Unmarshal(m, b)
@@ -343,7 +346,7 @@ func (m *StreamKeyRangeRequest) Reset()         { *m = StreamKeyRangeRequest{} }
 func (m *StreamKeyRangeRequest) String() string { return proto.CompactTextString(m) }
 func (*StreamKeyRangeRequest) ProtoMessage()    {}
 func (*StreamKeyRangeRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{2}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{2}
 }
 func (m *StreamKeyRangeRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_StreamKeyRangeRequest.Unmarshal(m, b)
@@ -396,7 +399,7 @@ func (m *StreamKeyRangeResponse) Reset()         { *m = StreamKeyRangeResponse{}
 func (m *StreamKeyRangeResponse) String() string { return proto.CompactTextString(m) }
 func (*StreamKeyRangeResponse) ProtoMessage()    {}
 func (*StreamKeyRangeResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{3}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{3}
 }
 func (m *StreamKeyRangeResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_StreamKeyRangeResponse.Unmarshal(m, b)
@@ -440,7 +443,7 @@ func (m *StreamTablesRequest) Reset()         { *m = StreamTablesRequest{} }
 func (m *StreamTablesRequest) String() string { return proto.CompactTextString(m) }
 func (*StreamTablesRequest) ProtoMessage()    {}
 func (*StreamTablesRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{4}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{4}
 }
 func (m *StreamTablesRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_StreamTablesRequest.Unmarshal(m, b)
@@ -493,7 +496,7 @@ func (m *StreamTablesResponse) Reset()         { *m = StreamTablesResponse{} }
 func (m *StreamTablesResponse) String() string { return proto.CompactTextString(m) }
 func (*StreamTablesResponse) ProtoMessage()    {}
 func (*StreamTablesResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{5}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{5}
 }
 func (m *StreamTablesResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_StreamTablesResponse.Unmarshal(m, b)
@@ -538,7 +541,7 @@ func (m *Rule) Reset()         { *m = Rule{} }
 func (m *Rule) String() string { return proto.CompactTextString(m) }
 func (*Rule) ProtoMessage()    {}
 func (*Rule) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{6}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{6}
 }
 func (m *Rule) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Rule.Unmarshal(m, b)
@@ -585,7 +588,7 @@ func (m *Filter) Reset()         { *m = Filter{} }
 func (m *Filter) String() string { return proto.CompactTextString(m) }
 func (*Filter) ProtoMessage()    {}
 func (*Filter) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{7}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{7}
 }
 func (m *Filter) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_Filter.Unmarshal(m, b)
@@ -640,7 +643,7 @@ func (m *BinlogSource) Reset()         { *m = BinlogSource{} }
 func (m *BinlogSource) String() string { return proto.CompactTextString(m) }
 func (*BinlogSource) ProtoMessage()    {}
 func (*BinlogSource) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{8}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{8}
 }
 func (m *BinlogSource) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_BinlogSource.Unmarshal(m, b)
@@ -722,7 +725,7 @@ func (m *RowChange) Reset()         { *m = RowChange{} }
 func (m *RowChange) String() string { return proto.CompactTextString(m) }
 func (*RowChange) ProtoMessage()    {}
 func (*RowChange) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{9}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{9}
 }
 func (m *RowChange) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_RowChange.Unmarshal(m, b)
@@ -769,7 +772,7 @@ func (m *RowEvent) Reset()         { *m = RowEvent{} }
 func (m *RowEvent) String() string { return proto.CompactTextString(m) }
 func (*RowEvent) ProtoMessage()    {}
 func (*RowEvent) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{10}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{10}
 }
 func (m *RowEvent) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_RowEvent.Unmarshal(m, b)
@@ -815,7 +818,7 @@ func (m *FieldEvent) Reset()         { *m = FieldEvent{} }
 func (m *FieldEvent) String() string { return proto.CompactTextString(m) }
 func (*FieldEvent) ProtoMessage()    {}
 func (*FieldEvent) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{11}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{11}
 }
 func (m *FieldEvent) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_FieldEvent.Unmarshal(m, b)
@@ -851,22 +854,24 @@ func (m *FieldEvent) GetFields() []*query.Field {
 
 // VEvent represents a vstream event
 type VEvent struct {
-	Type                 VEventType  `protobuf:"varint,1,opt,name=type,proto3,enum=binlogdata.VEventType" json:"type,omitempty"`
-	Timestamp            int64       `protobuf:"varint,2,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
-	Gtid                 string      `protobuf:"bytes,3,opt,name=gtid,proto3" json:"gtid,omitempty"`
-	Ddl                  string      `protobuf:"bytes,4,opt,name=ddl,proto3" json:"ddl,omitempty"`
-	RowEvent             *RowEvent   `protobuf:"bytes,5,opt,name=row_event,json=rowEvent,proto3" json:"row_event,omitempty"`
-	FieldEvent           *FieldEvent `protobuf:"bytes,6,opt,name=field_event,json=fieldEvent,proto3" json:"field_event,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}    `json:"-"`
-	XXX_unrecognized     []byte      `json:"-"`
-	XXX_sizecache        int32       `json:"-"`
+	Type       VEventType  `protobuf:"varint,1,opt,name=type,proto3,enum=binlogdata.VEventType" json:"type,omitempty"`
+	Timestamp  int64       `protobuf:"varint,2,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	Gtid       string      `protobuf:"bytes,3,opt,name=gtid,proto3" json:"gtid,omitempty"`
+	Ddl        string      `protobuf:"bytes,4,opt,name=ddl,proto3" json:"ddl,omitempty"`
+	RowEvent   *RowEvent   `protobuf:"bytes,5,opt,name=row_event,json=rowEvent,proto3" json:"row_event,omitempty"`
+	FieldEvent *FieldEvent `protobuf:"bytes,6,opt,name=field_event,json=fieldEvent,proto3" json:"field_event,omitempty"`
+	// current_time specifies the current time to handle clock skew.
+	CurrentTime          int64    `protobuf:"varint,20,opt,name=current_time,json=currentTime,proto3" json:"current_time,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *VEvent) Reset()         { *m = VEvent{} }
 func (m *VEvent) String() string { return proto.CompactTextString(m) }
 func (*VEvent) ProtoMessage()    {}
 func (*VEvent) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{12}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{12}
 }
 func (m *VEvent) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VEvent.Unmarshal(m, b)
@@ -928,6 +933,13 @@ func (m *VEvent) GetFieldEvent() *FieldEvent {
 	return nil
 }
 
+func (m *VEvent) GetCurrentTime() int64 {
+	if m != nil {
+		return m.CurrentTime
+	}
+	return 0
+}
+
 // VStreamRequest is the payload for VStream
 type VStreamRequest struct {
 	EffectiveCallerId    *vtrpc.CallerID       `protobuf:"bytes,1,opt,name=effective_caller_id,json=effectiveCallerId,proto3" json:"effective_caller_id,omitempty"`
@@ -944,7 +956,7 @@ func (m *VStreamRequest) Reset()         { *m = VStreamRequest{} }
 func (m *VStreamRequest) String() string { return proto.CompactTextString(m) }
 func (*VStreamRequest) ProtoMessage()    {}
 func (*VStreamRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{13}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{13}
 }
 func (m *VStreamRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VStreamRequest.Unmarshal(m, b)
@@ -1011,7 +1023,7 @@ func (m *VStreamResponse) Reset()         { *m = VStreamResponse{} }
 func (m *VStreamResponse) String() string { return proto.CompactTextString(m) }
 func (*VStreamResponse) ProtoMessage()    {}
 func (*VStreamResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_binlogdata_6d214635eb8c538c, []int{14}
+	return fileDescriptor_binlogdata_60517ed2deb82a7b, []int{14}
 }
 func (m *VStreamResponse) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_VStreamResponse.Unmarshal(m, b)
@@ -1060,82 +1072,84 @@ func init() {
 	proto.RegisterEnum("binlogdata.BinlogTransaction_Statement_Category", BinlogTransaction_Statement_Category_name, BinlogTransaction_Statement_Category_value)
 }
 
-func init() { proto.RegisterFile("binlogdata.proto", fileDescriptor_binlogdata_6d214635eb8c538c) }
-
-var fileDescriptor_binlogdata_6d214635eb8c538c = []byte{
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+func init() { proto.RegisterFile("binlogdata.proto", fileDescriptor_binlogdata_60517ed2deb82a7b) }
+
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 }
diff --git a/go/vt/vttablet/tabletmanager/vreplication/relaylog.go b/go/vt/vttablet/tabletmanager/vreplication/relaylog.go
index f0714390d2e..489fd8e90c3 100644
--- a/go/vt/vttablet/tabletmanager/vreplication/relaylog.go
+++ b/go/vt/vttablet/tabletmanager/vreplication/relaylog.go
@@ -38,7 +38,6 @@ type relayLog struct {
 	curSize  int
 	items    [][]*binlogdatapb.VEvent
 	timedout bool
-	err      error
 	// canAccept is true if: curSize<=maxSize, len(items)<maxItems, and ctx is not Done.
 	canAccept sync.Cond
 	// hasItems is true if len(items)>0, ctx is not Done, and interuptFetch is false.
diff --git a/go/vt/vttablet/tabletmanager/vreplication/vplayer.go b/go/vt/vttablet/tabletmanager/vreplication/vplayer.go
index f8a0520d868..53efc39cdba 100644
--- a/go/vt/vttablet/tabletmanager/vreplication/vplayer.go
+++ b/go/vt/vttablet/tabletmanager/vreplication/vplayer.go
@@ -39,7 +39,10 @@ import (
 )
 
 var (
-	idleTimeout      = 1 * time.Second
+	// idleTimeout is set to slightly above 1s, compared to heartbeatTime
+	// set by VStreamer at slightly below 1s. This minimizes conflicts
+	// between the two timeouts.
+	idleTimeout      = 1100 * time.Millisecond
 	dbLockRetryDelay = 1 * time.Second
 	relayLogMaxSize  = 10000
 	relayLogMaxItems = 1000
@@ -61,7 +64,11 @@ type vplayer struct {
 	unsavedGTID *binlogdatapb.VEvent
 	// timeLastSaved is set every time a GTID is saved.
 	timeLastSaved time.Time
-	stopPos       mysql.Position
+	// lastTimestampNs is the last timestamp seen so far.
+	lastTimestampNs int64
+	// timeOffsetNs keeps track of the clock difference with respect to source tablet.
+	timeOffsetNs int64
+	stopPos      mysql.Position
 
 	// pplan is built based on the source Filter at the beginning.
 	pplan *PlayerPlan
@@ -197,6 +204,12 @@ func (vp *vplayer) applyEvents(ctx context.Context, relay *relayLog) error {
 		if err != nil {
 			return err
 		}
+		// No events were received. This likely means that there's a network partition.
+		// So, we should assume we're falling behind.
+		if len(items) == 0 {
+			behind := time.Now().UnixNano() - vp.lastTimestampNs - vp.timeOffsetNs
+			vp.stats.SecondsBehindMaster.Set(behind / 1e9)
+		}
 		// Filtered replication often ends up receiving a large number of empty transactions.
 		// This is required because the player needs to know the latest position of the source.
 		// This allows it to stop at that position if requested.
@@ -221,6 +234,11 @@ func (vp *vplayer) applyEvents(ctx context.Context, relay *relayLog) error {
 		}
 		for i, events := range items {
 			for j, event := range events {
+				if event.Timestamp != 0 {
+					vp.lastTimestampNs = event.Timestamp * 1e9
+					vp.timeOffsetNs = time.Now().UnixNano() - event.CurrentTime
+					vp.stats.SecondsBehindMaster.Set(event.CurrentTime/1e9 - event.Timestamp)
+				}
 				mustSave := false
 				switch event.Type {
 				case binlogdatapb.VEventType_COMMIT:
@@ -354,6 +372,8 @@ func (vp *vplayer) applyEvent(ctx context.Context, event *binlogdatapb.VEvent, m
 				return err
 			}
 		}
+	case binlogdatapb.VEventType_HEARTBEAT:
+		// No-op: heartbeat timings are calculated in outer loop.
 	}
 	return nil
 }
@@ -444,9 +464,6 @@ func (vp *vplayer) updatePos(ts int64) error {
 	vp.unsavedGTID = nil
 	vp.timeLastSaved = time.Now()
 	vp.stats.SetLastPosition(vp.pos)
-	if ts != 0 {
-		vp.stats.SecondsBehindMaster.Set(vp.timeLastSaved.Unix() - ts)
-	}
 	return nil
 }
 
diff --git a/go/vt/vttablet/tabletserver/vstreamer/vstreamer.go b/go/vt/vttablet/tabletserver/vstreamer/vstreamer.go
index 4bf378d9f81..6923e0c8b04 100644
--- a/go/vt/vttablet/tabletserver/vstreamer/vstreamer.go
+++ b/go/vt/vttablet/tabletserver/vstreamer/vstreamer.go
@@ -21,6 +21,7 @@ import (
 	"flag"
 	"fmt"
 	"io"
+	"time"
 
 	"vitess.io/vitess/go/mysql"
 	"vitess.io/vitess/go/sqltypes"
@@ -36,6 +37,11 @@ import (
 
 var packetSize = flag.Int("vstream_packet_size", 10000, "Suggested packet size for VReplication streamer. This is used only as a recommendation. The actual packet size may be more or less than this amount.")
 
+// heartbeatTime is set to slightly below 1s, compared to idleTimeout
+// set by VPlayer at slightly above 1s. This minimizes conflicts
+// between the two timeouts.
+var heartbeatTime = 900 * time.Millisecond
+
 type vstreamer struct {
 	ctx    context.Context
 	cancel func()
@@ -132,9 +138,8 @@ func (vs *vstreamer) parseEvents(ctx context.Context, events <-chan mysql.Binlog
 		case binlogdatapb.VEventType_GTID, binlogdatapb.VEventType_BEGIN, binlogdatapb.VEventType_FIELD:
 			// We never have to send GTID, BEGIN or FIELD events on their own.
 			bufferedEvents = append(bufferedEvents, vevent)
-		case binlogdatapb.VEventType_COMMIT, binlogdatapb.VEventType_DDL:
-			// COMMIT and DDL are terminal. There may be no more events after
-			// these for a long time. So, we have to send whatever we have.
+		case binlogdatapb.VEventType_COMMIT, binlogdatapb.VEventType_DDL, binlogdatapb.VEventType_HEARTBEAT:
+			// COMMIT, DDL and HEARTBEAT must be immediately sent.
 			bufferedEvents = append(bufferedEvents, vevent)
 			vevents := bufferedEvents
 			bufferedEvents = nil
@@ -167,7 +172,16 @@ func (vs *vstreamer) parseEvents(ctx context.Context, events <-chan mysql.Binlog
 	}
 
 	// Main loop: calls bufferAndTransmit as events arrive.
+	timer := time.NewTimer(heartbeatTime)
+	defer timer.Stop()
 	for {
+		timer.Reset(heartbeatTime)
+		// Drain event if timer fired before reset.
+		select {
+		case <-timer.C:
+		default:
+		}
+
 		select {
 		case ev, ok := <-events:
 			if !ok {
@@ -196,6 +210,18 @@ func (vs *vstreamer) parseEvents(ctx context.Context, events <-chan mysql.Binlog
 			}
 		case <-ctx.Done():
 			return nil
+		case <-timer.C:
+			now := time.Now().UnixNano()
+			if err := bufferAndTransmit(&binlogdatapb.VEvent{
+				Type:        binlogdatapb.VEventType_HEARTBEAT,
+				Timestamp:   now / 1e9,
+				CurrentTime: now,
+			}); err != nil {
+				if err == io.EOF {
+					return nil
+				}
+				return fmt.Errorf("error sending event: %v", err)
+			}
 		}
 	}
 }
@@ -392,6 +418,7 @@ func (vs *vstreamer) parseEvent(ev mysql.BinlogEvent) ([]*binlogdatapb.VEvent, e
 	}
 	for _, vevent := range vevents {
 		vevent.Timestamp = int64(ev.Timestamp())
+		vevent.CurrentTime = time.Now().UnixNano()
 	}
 	return vevents, nil
 }
diff --git a/go/vt/vttablet/tabletserver/vstreamer/vstreamer_test.go b/go/vt/vttablet/tabletserver/vstreamer/vstreamer_test.go
index 517e19534ac..2aac52449b5 100644
--- a/go/vt/vttablet/tabletserver/vstreamer/vstreamer_test.go
+++ b/go/vt/vttablet/tabletserver/vstreamer/vstreamer_test.go
@@ -919,6 +919,8 @@ func expectLog(ctx context.Context, t *testing.T, input interface{}, ch <-chan [
 			t.Fatalf("%v: evs\n%v, want\n%v", input, evs, wantset)
 		}
 		for i, want := range wantset {
+			// CurrentTime is not testable.
+			evs[i].CurrentTime = 0
 			switch want {
 			case "gtid|begin":
 				if evs[i].Type != binlogdatapb.VEventType_GTID && evs[i].Type != binlogdatapb.VEventType_BEGIN {
diff --git a/proto/binlogdata.proto b/proto/binlogdata.proto
index a1471e44f5c..4942198823a 100644
--- a/proto/binlogdata.proto
+++ b/proto/binlogdata.proto
@@ -185,6 +185,7 @@ enum VEventType {
   OTHER = 11;
   ROW = 12;
   FIELD = 13;
+  HEARTBEAT = 14;
 }
 
 // RowChange represents one row change
@@ -212,6 +213,8 @@ message VEvent {
   string ddl = 4;
   RowEvent row_event = 5;
   FieldEvent field_event = 6;
+  // current_time specifies the current time to handle clock skew.
+  int64 current_time = 20;
 }
 
 // VStreamRequest is the payload for VStream
diff --git a/py/vtproto/binlogdata_pb2.py b/py/vtproto/binlogdata_pb2.py
index e586658b98d..fe5c3d42e8c 100644
--- a/py/vtproto/binlogdata_pb2.py
+++ b/py/vtproto/binlogdata_pb2.py
@@ -23,7 +23,7 @@
   package='binlogdata',
   syntax='proto3',
   serialized_options=_b('Z\'vitess.io/vitess/go/vt/proto/binlogdata'),
-  serialized_pb=_b('\n\x10\x62inlogdata.proto\x12\nbinlogdata\x1a\x0bvtrpc.proto\x1a\x0bquery.proto\x1a\x0etopodata.proto\"7\n\x07\x43harset\x12\x0e\n\x06\x63lient\x18\x01 \x01(\x05\x12\x0c\n\x04\x63onn\x18\x02 \x01(\x05\x12\x0e\n\x06server\x18\x03 \x01(\x05\"\xb5\x03\n\x11\x42inlogTransaction\x12;\n\nstatements\x18\x01 \x03(\x0b\x32\'.binlogdata.BinlogTransaction.Statement\x12&\n\x0b\x65vent_token\x18\x04 \x01(\x0b\x32\x11.query.EventToken\x1a\xae\x02\n\tStatement\x12\x42\n\x08\x63\x61tegory\x18\x01 \x01(\x0e\x32\x30.binlogdata.BinlogTransaction.Statement.Category\x12$\n\x07\x63harset\x18\x02 \x01(\x0b\x32\x13.binlogdata.Charset\x12\x0b\n\x03sql\x18\x03 \x01(\x0c\"\xa9\x01\n\x08\x43\x61tegory\x12\x13\n\x0f\x42L_UNRECOGNIZED\x10\x00\x12\x0c\n\x08\x42L_BEGIN\x10\x01\x12\r\n\tBL_COMMIT\x10\x02\x12\x0f\n\x0b\x42L_ROLLBACK\x10\x03\x12\x15\n\x11\x42L_DML_DEPRECATED\x10\x04\x12\n\n\x06\x42L_DDL\x10\x05\x12\n\n\x06\x42L_SET\x10\x06\x12\r\n\tBL_INSERT\x10\x07\x12\r\n\tBL_UPDATE\x10\x08\x12\r\n\tBL_DELETE\x10\tJ\x04\x08\x02\x10\x03J\x04\x08\x03\x10\x04\"v\n\x15StreamKeyRangeRequest\x12\x10\n\x08position\x18\x01 \x01(\t\x12%\n\tkey_range\x18\x02 \x01(\x0b\x32\x12.topodata.KeyRange\x12$\n\x07\x63harset\x18\x03 \x01(\x0b\x32\x13.binlogdata.Charset\"S\n\x16StreamKeyRangeResponse\x12\x39\n\x12\x62inlog_transaction\x18\x01 \x01(\x0b\x32\x1d.binlogdata.BinlogTransaction\"]\n\x13StreamTablesRequest\x12\x10\n\x08position\x18\x01 \x01(\t\x12\x0e\n\x06tables\x18\x02 \x03(\t\x12$\n\x07\x63harset\x18\x03 \x01(\x0b\x32\x13.binlogdata.Charset\"Q\n\x14StreamTablesResponse\x12\x39\n\x12\x62inlog_transaction\x18\x01 \x01(\x0b\x32\x1d.binlogdata.BinlogTransaction\"%\n\x04Rule\x12\r\n\x05match\x18\x01 \x01(\t\x12\x0e\n\x06\x66ilter\x18\x02 \x01(\t\")\n\x06\x46ilter\x12\x1f\n\x05rules\x18\x01 \x03(\x0b\x32\x10.binlogdata.Rule\"\xde\x01\n\x0c\x42inlogSource\x12\x10\n\x08keyspace\x18\x01 \x01(\t\x12\r\n\x05shard\x18\x02 \x01(\t\x12)\n\x0btablet_type\x18\x03 \x01(\x0e\x32\x14.topodata.TabletType\x12%\n\tkey_range\x18\x04 \x01(\x0b\x32\x12.topodata.KeyRange\x12\x0e\n\x06tables\x18\x05 \x03(\t\x12\"\n\x06\x66ilter\x18\x06 \x01(\x0b\x32\x12.binlogdata.Filter\x12\'\n\x06on_ddl\x18\x07 \x01(\x0e\x32\x17.binlogdata.OnDDLAction\"B\n\tRowChange\x12\x1a\n\x06\x62\x65\x66ore\x18\x01 \x01(\x0b\x32\n.query.Row\x12\x19\n\x05\x61\x66ter\x18\x02 \x01(\x0b\x32\n.query.Row\"J\n\x08RowEvent\x12\x12\n\ntable_name\x18\x01 \x01(\t\x12*\n\x0brow_changes\x18\x02 \x03(\x0b\x32\x15.binlogdata.RowChange\">\n\nFieldEvent\x12\x12\n\ntable_name\x18\x01 \x01(\t\x12\x1c\n\x06\x66ields\x18\x02 \x03(\x0b\x32\x0c.query.Field\"\xb2\x01\n\x06VEvent\x12$\n\x04type\x18\x01 \x01(\x0e\x32\x16.binlogdata.VEventType\x12\x11\n\ttimestamp\x18\x02 \x01(\x03\x12\x0c\n\x04gtid\x18\x03 \x01(\t\x12\x0b\n\x03\x64\x64l\x18\x04 \x01(\t\x12\'\n\trow_event\x18\x05 \x01(\x0b\x32\x14.binlogdata.RowEvent\x12+\n\x0b\x66ield_event\x18\x06 \x01(\x0b\x32\x16.binlogdata.FieldEvent\"\xc7\x01\n\x0eVStreamRequest\x12,\n\x13\x65\x66\x66\x65\x63tive_caller_id\x18\x01 \x01(\x0b\x32\x0f.vtrpc.CallerID\x12\x32\n\x13immediate_caller_id\x18\x02 \x01(\x0b\x32\x15.query.VTGateCallerID\x12\x1d\n\x06target\x18\x03 \x01(\x0b\x32\r.query.Target\x12\x10\n\x08position\x18\x04 \x01(\t\x12\"\n\x06\x66ilter\x18\x05 \x01(\x0b\x32\x12.binlogdata.Filter\"5\n\x0fVStreamResponse\x12\"\n\x06\x65vents\x18\x01 \x03(\x0b\x32\x12.binlogdata.VEvent*>\n\x0bOnDDLAction\x12\n\n\x06IGNORE\x10\x00\x12\x08\n\x04STOP\x10\x01\x12\x08\n\x04\x45XEC\x10\x02\x12\x0f\n\x0b\x45XEC_IGNORE\x10\x03*\xaa\x01\n\nVEventType\x12\x0b\n\x07UNKNOWN\x10\x00\x12\x08\n\x04GTID\x10\x01\x12\t\n\x05\x42\x45GIN\x10\x02\x12\n\n\x06\x43OMMIT\x10\x03\x12\x0c\n\x08ROLLBACK\x10\x04\x12\x07\n\x03\x44\x44L\x10\x05\x12\n\n\x06INSERT\x10\x06\x12\x0b\n\x07REPLACE\x10\x07\x12\n\n\x06UPDATE\x10\x08\x12\n\n\x06\x44\x45LETE\x10\t\x12\x07\n\x03SET\x10\n\x12\t\n\x05OTHER\x10\x0b\x12\x07\n\x03ROW\x10\x0c\x12\t\n\x05\x46IELD\x10\rB)Z\'vitess.io/vitess/go/vt/proto/binlogdatab\x06proto3')
+  serialized_pb=_b('\n\x10\x62inlogdata.proto\x12\nbinlogdata\x1a\x0bvtrpc.proto\x1a\x0bquery.proto\x1a\x0etopodata.proto\"7\n\x07\x43harset\x12\x0e\n\x06\x63lient\x18\x01 \x01(\x05\x12\x0c\n\x04\x63onn\x18\x02 \x01(\x05\x12\x0e\n\x06server\x18\x03 \x01(\x05\"\xb5\x03\n\x11\x42inlogTransaction\x12;\n\nstatements\x18\x01 \x03(\x0b\x32\'.binlogdata.BinlogTransaction.Statement\x12&\n\x0b\x65vent_token\x18\x04 \x01(\x0b\x32\x11.query.EventToken\x1a\xae\x02\n\tStatement\x12\x42\n\x08\x63\x61tegory\x18\x01 \x01(\x0e\x32\x30.binlogdata.BinlogTransaction.Statement.Category\x12$\n\x07\x63harset\x18\x02 \x01(\x0b\x32\x13.binlogdata.Charset\x12\x0b\n\x03sql\x18\x03 \x01(\x0c\"\xa9\x01\n\x08\x43\x61tegory\x12\x13\n\x0f\x42L_UNRECOGNIZED\x10\x00\x12\x0c\n\x08\x42L_BEGIN\x10\x01\x12\r\n\tBL_COMMIT\x10\x02\x12\x0f\n\x0b\x42L_ROLLBACK\x10\x03\x12\x15\n\x11\x42L_DML_DEPRECATED\x10\x04\x12\n\n\x06\x42L_DDL\x10\x05\x12\n\n\x06\x42L_SET\x10\x06\x12\r\n\tBL_INSERT\x10\x07\x12\r\n\tBL_UPDATE\x10\x08\x12\r\n\tBL_DELETE\x10\tJ\x04\x08\x02\x10\x03J\x04\x08\x03\x10\x04\"v\n\x15StreamKeyRangeRequest\x12\x10\n\x08position\x18\x01 \x01(\t\x12%\n\tkey_range\x18\x02 \x01(\x0b\x32\x12.topodata.KeyRange\x12$\n\x07\x63harset\x18\x03 \x01(\x0b\x32\x13.binlogdata.Charset\"S\n\x16StreamKeyRangeResponse\x12\x39\n\x12\x62inlog_transaction\x18\x01 \x01(\x0b\x32\x1d.binlogdata.BinlogTransaction\"]\n\x13StreamTablesRequest\x12\x10\n\x08position\x18\x01 \x01(\t\x12\x0e\n\x06tables\x18\x02 \x03(\t\x12$\n\x07\x63harset\x18\x03 \x01(\x0b\x32\x13.binlogdata.Charset\"Q\n\x14StreamTablesResponse\x12\x39\n\x12\x62inlog_transaction\x18\x01 \x01(\x0b\x32\x1d.binlogdata.BinlogTransaction\"%\n\x04Rule\x12\r\n\x05match\x18\x01 \x01(\t\x12\x0e\n\x06\x66ilter\x18\x02 \x01(\t\")\n\x06\x46ilter\x12\x1f\n\x05rules\x18\x01 \x03(\x0b\x32\x10.binlogdata.Rule\"\xde\x01\n\x0c\x42inlogSource\x12\x10\n\x08keyspace\x18\x01 \x01(\t\x12\r\n\x05shard\x18\x02 \x01(\t\x12)\n\x0btablet_type\x18\x03 \x01(\x0e\x32\x14.topodata.TabletType\x12%\n\tkey_range\x18\x04 \x01(\x0b\x32\x12.topodata.KeyRange\x12\x0e\n\x06tables\x18\x05 \x03(\t\x12\"\n\x06\x66ilter\x18\x06 \x01(\x0b\x32\x12.binlogdata.Filter\x12\'\n\x06on_ddl\x18\x07 \x01(\x0e\x32\x17.binlogdata.OnDDLAction\"B\n\tRowChange\x12\x1a\n\x06\x62\x65\x66ore\x18\x01 \x01(\x0b\x32\n.query.Row\x12\x19\n\x05\x61\x66ter\x18\x02 \x01(\x0b\x32\n.query.Row\"J\n\x08RowEvent\x12\x12\n\ntable_name\x18\x01 \x01(\t\x12*\n\x0brow_changes\x18\x02 \x03(\x0b\x32\x15.binlogdata.RowChange\">\n\nFieldEvent\x12\x12\n\ntable_name\x18\x01 \x01(\t\x12\x1c\n\x06\x66ields\x18\x02 \x03(\x0b\x32\x0c.query.Field\"\xc8\x01\n\x06VEvent\x12$\n\x04type\x18\x01 \x01(\x0e\x32\x16.binlogdata.VEventType\x12\x11\n\ttimestamp\x18\x02 \x01(\x03\x12\x0c\n\x04gtid\x18\x03 \x01(\t\x12\x0b\n\x03\x64\x64l\x18\x04 \x01(\t\x12\'\n\trow_event\x18\x05 \x01(\x0b\x32\x14.binlogdata.RowEvent\x12+\n\x0b\x66ield_event\x18\x06 \x01(\x0b\x32\x16.binlogdata.FieldEvent\x12\x14\n\x0c\x63urrent_time\x18\x14 \x01(\x03\"\xc7\x01\n\x0eVStreamRequest\x12,\n\x13\x65\x66\x66\x65\x63tive_caller_id\x18\x01 \x01(\x0b\x32\x0f.vtrpc.CallerID\x12\x32\n\x13immediate_caller_id\x18\x02 \x01(\x0b\x32\x15.query.VTGateCallerID\x12\x1d\n\x06target\x18\x03 \x01(\x0b\x32\r.query.Target\x12\x10\n\x08position\x18\x04 \x01(\t\x12\"\n\x06\x66ilter\x18\x05 \x01(\x0b\x32\x12.binlogdata.Filter\"5\n\x0fVStreamResponse\x12\"\n\x06\x65vents\x18\x01 \x03(\x0b\x32\x12.binlogdata.VEvent*>\n\x0bOnDDLAction\x12\n\n\x06IGNORE\x10\x00\x12\x08\n\x04STOP\x10\x01\x12\x08\n\x04\x45XEC\x10\x02\x12\x0f\n\x0b\x45XEC_IGNORE\x10\x03*\xb9\x01\n\nVEventType\x12\x0b\n\x07UNKNOWN\x10\x00\x12\x08\n\x04GTID\x10\x01\x12\t\n\x05\x42\x45GIN\x10\x02\x12\n\n\x06\x43OMMIT\x10\x03\x12\x0c\n\x08ROLLBACK\x10\x04\x12\x07\n\x03\x44\x44L\x10\x05\x12\n\n\x06INSERT\x10\x06\x12\x0b\n\x07REPLACE\x10\x07\x12\n\n\x06UPDATE\x10\x08\x12\n\n\x06\x44\x45LETE\x10\t\x12\x07\n\x03SET\x10\n\x12\t\n\x05OTHER\x10\x0b\x12\x07\n\x03ROW\x10\x0c\x12\t\n\x05\x46IELD\x10\r\x12\r\n\tHEARTBEAT\x10\x0e\x42)Z\'vitess.io/vitess/go/vt/proto/binlogdatab\x06proto3')
   ,
   dependencies=[vtrpc__pb2.DESCRIPTOR,query__pb2.DESCRIPTOR,topodata__pb2.DESCRIPTOR,])
 
@@ -52,8 +52,8 @@
   ],
   containing_type=None,
   serialized_options=None,
-  serialized_start=1907,
-  serialized_end=1969,
+  serialized_start=1929,
+  serialized_end=1991,
 )
 _sym_db.RegisterEnumDescriptor(_ONDDLACTION)
 
@@ -120,11 +120,15 @@
       name='FIELD', index=13, number=13,
       serialized_options=None,
       type=None),
+    _descriptor.EnumValueDescriptor(
+      name='HEARTBEAT', index=14, number=14,
+      serialized_options=None,
+      type=None),
   ],
   containing_type=None,
   serialized_options=None,
-  serialized_start=1972,
-  serialized_end=2142,
+  serialized_start=1994,
+  serialized_end=2179,
 )
 _sym_db.RegisterEnumDescriptor(_VEVENTTYPE)
 
@@ -147,6 +151,7 @@
 OTHER = 11
 ROW = 12
 FIELD = 13
+HEARTBEAT = 14
 
 
 _BINLOGTRANSACTION_STATEMENT_CATEGORY = _descriptor.EnumDescriptor(
@@ -789,6 +794,13 @@
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       serialized_options=None, file=DESCRIPTOR),
+    _descriptor.FieldDescriptor(
+      name='current_time', full_name='binlogdata.VEvent.current_time', index=6,
+      number=20, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR),
   ],
   extensions=[
   ],
@@ -802,7 +814,7 @@
   oneofs=[
   ],
   serialized_start=1470,
-  serialized_end=1648,
+  serialized_end=1670,
 )
 
 
@@ -860,8 +872,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=1651,
-  serialized_end=1850,
+  serialized_start=1673,
+  serialized_end=1872,
 )
 
 
@@ -891,8 +903,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=1852,
-  serialized_end=1905,
+  serialized_start=1874,
+  serialized_end=1927,
 )
 
 _BINLOGTRANSACTION_STATEMENT.fields_by_name['category'].enum_type = _BINLOGTRANSACTION_STATEMENT_CATEGORY