diff --git a/Cargo.lock b/Cargo.lock
index e17aaa9..2b8c531 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -160,7 +160,7 @@ dependencies = [
 
 [[package]]
 name = "dragonfly-api"
-version = "2.0.112"
+version = "2.0.113"
 dependencies = [
  "prost 0.11.9",
  "prost-types 0.12.4",
diff --git a/Cargo.toml b/Cargo.toml
index a5322fd..4fb9516 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "dragonfly-api"
-version = "2.0.112"
+version = "2.0.113"
 authors = ["Gaius <gaius.qi@gmail.com>"]
 edition = "2021"
 license = "Apache-2.0"
diff --git a/pkg/apis/scheduler/v2/scheduler.pb.go b/pkg/apis/scheduler/v2/scheduler.pb.go
index 216ed58..a468977 100644
--- a/pkg/apis/scheduler/v2/scheduler.pb.go
+++ b/pkg/apis/scheduler/v2/scheduler.pb.go
@@ -1467,6 +1467,64 @@ func (x *StatTaskRequest) GetId() string {
 	return ""
 }
 
+// LeaveTaskRequest represents request of LeaveTask.
+type LeaveTaskRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Host id.
+	HostId string `protobuf:"bytes,1,opt,name=host_id,json=hostId,proto3" json:"host_id,omitempty"`
+	// Task id.
+	TaskId string `protobuf:"bytes,2,opt,name=task_id,json=taskId,proto3" json:"task_id,omitempty"`
+}
+
+func (x *LeaveTaskRequest) Reset() {
+	*x = LeaveTaskRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[22]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *LeaveTaskRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*LeaveTaskRequest) ProtoMessage() {}
+
+func (x *LeaveTaskRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[22]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use LeaveTaskRequest.ProtoReflect.Descriptor instead.
+func (*LeaveTaskRequest) Descriptor() ([]byte, []int) {
+	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{22}
+}
+
+func (x *LeaveTaskRequest) GetHostId() string {
+	if x != nil {
+		return x.HostId
+	}
+	return ""
+}
+
+func (x *LeaveTaskRequest) GetTaskId() string {
+	if x != nil {
+		return x.TaskId
+	}
+	return ""
+}
+
 // AnnounceHostRequest represents request of AnnounceHost.
 type AnnounceHostRequest struct {
 	state         protoimpl.MessageState
@@ -1480,7 +1538,7 @@ type AnnounceHostRequest struct {
 func (x *AnnounceHostRequest) Reset() {
 	*x = AnnounceHostRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[22]
+		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[23]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1493,7 +1551,7 @@ func (x *AnnounceHostRequest) String() string {
 func (*AnnounceHostRequest) ProtoMessage() {}
 
 func (x *AnnounceHostRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[22]
+	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[23]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1506,7 +1564,7 @@ func (x *AnnounceHostRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AnnounceHostRequest.ProtoReflect.Descriptor instead.
 func (*AnnounceHostRequest) Descriptor() ([]byte, []int) {
-	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{22}
+	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{23}
 }
 
 func (x *AnnounceHostRequest) GetHost() *v2.Host {
@@ -1529,7 +1587,7 @@ type LeaveHostRequest struct {
 func (x *LeaveHostRequest) Reset() {
 	*x = LeaveHostRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[23]
+		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[24]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1542,7 +1600,7 @@ func (x *LeaveHostRequest) String() string {
 func (*LeaveHostRequest) ProtoMessage() {}
 
 func (x *LeaveHostRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[23]
+	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[24]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1555,7 +1613,7 @@ func (x *LeaveHostRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use LeaveHostRequest.ProtoReflect.Descriptor instead.
 func (*LeaveHostRequest) Descriptor() ([]byte, []int) {
-	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{23}
+	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{24}
 }
 
 func (x *LeaveHostRequest) GetId() string {
@@ -1575,7 +1633,7 @@ type ProbeStartedRequest struct {
 func (x *ProbeStartedRequest) Reset() {
 	*x = ProbeStartedRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[24]
+		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[25]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1588,7 +1646,7 @@ func (x *ProbeStartedRequest) String() string {
 func (*ProbeStartedRequest) ProtoMessage() {}
 
 func (x *ProbeStartedRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[24]
+	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[25]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1601,7 +1659,7 @@ func (x *ProbeStartedRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ProbeStartedRequest.ProtoReflect.Descriptor instead.
 func (*ProbeStartedRequest) Descriptor() ([]byte, []int) {
-	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{24}
+	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{25}
 }
 
 // Probe information.
@@ -1621,7 +1679,7 @@ type Probe struct {
 func (x *Probe) Reset() {
 	*x = Probe{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[25]
+		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[26]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1634,7 +1692,7 @@ func (x *Probe) String() string {
 func (*Probe) ProtoMessage() {}
 
 func (x *Probe) ProtoReflect() protoreflect.Message {
-	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[25]
+	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[26]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1647,7 +1705,7 @@ func (x *Probe) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Probe.ProtoReflect.Descriptor instead.
 func (*Probe) Descriptor() ([]byte, []int) {
-	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{25}
+	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{26}
 }
 
 func (x *Probe) GetHost() *v2.Host {
@@ -1684,7 +1742,7 @@ type ProbeFinishedRequest struct {
 func (x *ProbeFinishedRequest) Reset() {
 	*x = ProbeFinishedRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[26]
+		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[27]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1697,7 +1755,7 @@ func (x *ProbeFinishedRequest) String() string {
 func (*ProbeFinishedRequest) ProtoMessage() {}
 
 func (x *ProbeFinishedRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[26]
+	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[27]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1710,7 +1768,7 @@ func (x *ProbeFinishedRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ProbeFinishedRequest.ProtoReflect.Descriptor instead.
 func (*ProbeFinishedRequest) Descriptor() ([]byte, []int) {
-	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{26}
+	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{27}
 }
 
 func (x *ProbeFinishedRequest) GetProbes() []*Probe {
@@ -1735,7 +1793,7 @@ type FailedProbe struct {
 func (x *FailedProbe) Reset() {
 	*x = FailedProbe{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[27]
+		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[28]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1748,7 +1806,7 @@ func (x *FailedProbe) String() string {
 func (*FailedProbe) ProtoMessage() {}
 
 func (x *FailedProbe) ProtoReflect() protoreflect.Message {
-	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[27]
+	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[28]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1761,7 +1819,7 @@ func (x *FailedProbe) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FailedProbe.ProtoReflect.Descriptor instead.
 func (*FailedProbe) Descriptor() ([]byte, []int) {
-	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{27}
+	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{28}
 }
 
 func (x *FailedProbe) GetHost() *v2.Host {
@@ -1791,7 +1849,7 @@ type ProbeFailedRequest struct {
 func (x *ProbeFailedRequest) Reset() {
 	*x = ProbeFailedRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[28]
+		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[29]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1804,7 +1862,7 @@ func (x *ProbeFailedRequest) String() string {
 func (*ProbeFailedRequest) ProtoMessage() {}
 
 func (x *ProbeFailedRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[28]
+	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[29]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1817,7 +1875,7 @@ func (x *ProbeFailedRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ProbeFailedRequest.ProtoReflect.Descriptor instead.
 func (*ProbeFailedRequest) Descriptor() ([]byte, []int) {
-	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{28}
+	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{29}
 }
 
 func (x *ProbeFailedRequest) GetProbes() []*FailedProbe {
@@ -1846,7 +1904,7 @@ type SyncProbesRequest struct {
 func (x *SyncProbesRequest) Reset() {
 	*x = SyncProbesRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[29]
+		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[30]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1859,7 +1917,7 @@ func (x *SyncProbesRequest) String() string {
 func (*SyncProbesRequest) ProtoMessage() {}
 
 func (x *SyncProbesRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[29]
+	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[30]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1872,7 +1930,7 @@ func (x *SyncProbesRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SyncProbesRequest.ProtoReflect.Descriptor instead.
 func (*SyncProbesRequest) Descriptor() ([]byte, []int) {
-	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{29}
+	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{30}
 }
 
 func (x *SyncProbesRequest) GetHost() *v2.Host {
@@ -1945,7 +2003,7 @@ type SyncProbesResponse struct {
 func (x *SyncProbesResponse) Reset() {
 	*x = SyncProbesResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[30]
+		mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[31]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1958,7 +2016,7 @@ func (x *SyncProbesResponse) String() string {
 func (*SyncProbesResponse) ProtoMessage() {}
 
 func (x *SyncProbesResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[30]
+	mi := &file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[31]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1971,7 +2029,7 @@ func (x *SyncProbesResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SyncProbesResponse.ProtoReflect.Descriptor instead.
 func (*SyncProbesResponse) Descriptor() ([]byte, []int) {
-	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{30}
+	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP(), []int{31}
 }
 
 func (x *SyncProbesResponse) GetHosts() []*v2.Host {
@@ -2242,113 +2300,123 @@ var file_pkg_apis_scheduler_v2_scheduler_proto_rawDesc = []byte{
 	0x72, 0x02, 0x10, 0x01, 0x52, 0x06, 0x70, 0x65, 0x65, 0x72, 0x49, 0x64, 0x22, 0x2a, 0x0a, 0x0f,
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 }
 
 var (
@@ -2363,7 +2431,7 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_rawDescGZIP() []byte {
 	return file_pkg_apis_scheduler_v2_scheduler_proto_rawDescData
 }
 
-var file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes = make([]protoimpl.MessageInfo, 31)
+var file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes = make([]protoimpl.MessageInfo, 32)
 var file_pkg_apis_scheduler_v2_scheduler_proto_goTypes = []interface{}{
 	(*RegisterPeerRequest)(nil),                      // 0: scheduler.v2.RegisterPeerRequest
 	(*DownloadPeerStartedRequest)(nil),               // 1: scheduler.v2.DownloadPeerStartedRequest
@@ -2387,31 +2455,32 @@ var file_pkg_apis_scheduler_v2_scheduler_proto_goTypes = []interface{}{
 	(*ExchangePeerResponse)(nil),                     // 19: scheduler.v2.ExchangePeerResponse
 	(*LeavePeerRequest)(nil),                         // 20: scheduler.v2.LeavePeerRequest
 	(*StatTaskRequest)(nil),                          // 21: scheduler.v2.StatTaskRequest
-	(*AnnounceHostRequest)(nil),                      // 22: scheduler.v2.AnnounceHostRequest
-	(*LeaveHostRequest)(nil),                         // 23: scheduler.v2.LeaveHostRequest
-	(*ProbeStartedRequest)(nil),                      // 24: scheduler.v2.ProbeStartedRequest
-	(*Probe)(nil),                                    // 25: scheduler.v2.Probe
-	(*ProbeFinishedRequest)(nil),                     // 26: scheduler.v2.ProbeFinishedRequest
-	(*FailedProbe)(nil),                              // 27: scheduler.v2.FailedProbe
-	(*ProbeFailedRequest)(nil),                       // 28: scheduler.v2.ProbeFailedRequest
-	(*SyncProbesRequest)(nil),                        // 29: scheduler.v2.SyncProbesRequest
-	(*SyncProbesResponse)(nil),                       // 30: scheduler.v2.SyncProbesResponse
-	(*v2.Download)(nil),                              // 31: common.v2.Download
-	(*v2.Peer)(nil),                                  // 32: common.v2.Peer
-	(*v2.Piece)(nil),                                 // 33: common.v2.Piece
-	(*v21.HTTP)(nil),                                 // 34: errordetails.v2.HTTP
-	(*v2.Host)(nil),                                  // 35: common.v2.Host
-	(*durationpb.Duration)(nil),                      // 36: google.protobuf.Duration
-	(*timestamppb.Timestamp)(nil),                    // 37: google.protobuf.Timestamp
-	(*emptypb.Empty)(nil),                            // 38: google.protobuf.Empty
-	(*v2.Task)(nil),                                  // 39: common.v2.Task
+	(*LeaveTaskRequest)(nil),                         // 22: scheduler.v2.LeaveTaskRequest
+	(*AnnounceHostRequest)(nil),                      // 23: scheduler.v2.AnnounceHostRequest
+	(*LeaveHostRequest)(nil),                         // 24: scheduler.v2.LeaveHostRequest
+	(*ProbeStartedRequest)(nil),                      // 25: scheduler.v2.ProbeStartedRequest
+	(*Probe)(nil),                                    // 26: scheduler.v2.Probe
+	(*ProbeFinishedRequest)(nil),                     // 27: scheduler.v2.ProbeFinishedRequest
+	(*FailedProbe)(nil),                              // 28: scheduler.v2.FailedProbe
+	(*ProbeFailedRequest)(nil),                       // 29: scheduler.v2.ProbeFailedRequest
+	(*SyncProbesRequest)(nil),                        // 30: scheduler.v2.SyncProbesRequest
+	(*SyncProbesResponse)(nil),                       // 31: scheduler.v2.SyncProbesResponse
+	(*v2.Download)(nil),                              // 32: common.v2.Download
+	(*v2.Peer)(nil),                                  // 33: common.v2.Peer
+	(*v2.Piece)(nil),                                 // 34: common.v2.Piece
+	(*v21.HTTP)(nil),                                 // 35: errordetails.v2.HTTP
+	(*v2.Host)(nil),                                  // 36: common.v2.Host
+	(*durationpb.Duration)(nil),                      // 37: google.protobuf.Duration
+	(*timestamppb.Timestamp)(nil),                    // 38: google.protobuf.Timestamp
+	(*emptypb.Empty)(nil),                            // 39: google.protobuf.Empty
+	(*v2.Task)(nil),                                  // 40: common.v2.Task
 }
 var file_pkg_apis_scheduler_v2_scheduler_proto_depIdxs = []int32{
-	31, // 0: scheduler.v2.RegisterPeerRequest.download:type_name -> common.v2.Download
-	32, // 1: scheduler.v2.RescheduleRequest.candidate_parents:type_name -> common.v2.Peer
-	33, // 2: scheduler.v2.DownloadPieceFinishedRequest.piece:type_name -> common.v2.Piece
-	33, // 3: scheduler.v2.DownloadPieceBackToSourceFinishedRequest.piece:type_name -> common.v2.Piece
-	34, // 4: scheduler.v2.DownloadPieceBackToSourceFailedRequest.http:type_name -> errordetails.v2.HTTP
+	32, // 0: scheduler.v2.RegisterPeerRequest.download:type_name -> common.v2.Download
+	33, // 1: scheduler.v2.RescheduleRequest.candidate_parents:type_name -> common.v2.Peer
+	34, // 2: scheduler.v2.DownloadPieceFinishedRequest.piece:type_name -> common.v2.Piece
+	34, // 3: scheduler.v2.DownloadPieceBackToSourceFinishedRequest.piece:type_name -> common.v2.Piece
+	35, // 4: scheduler.v2.DownloadPieceBackToSourceFailedRequest.http:type_name -> errordetails.v2.HTTP
 	0,  // 5: scheduler.v2.AnnouncePeerRequest.register_peer_request:type_name -> scheduler.v2.RegisterPeerRequest
 	1,  // 6: scheduler.v2.AnnouncePeerRequest.download_peer_started_request:type_name -> scheduler.v2.DownloadPeerStartedRequest
 	2,  // 7: scheduler.v2.AnnouncePeerRequest.download_peer_back_to_source_started_request:type_name -> scheduler.v2.DownloadPeerBackToSourceStartedRequest
@@ -2424,40 +2493,42 @@ var file_pkg_apis_scheduler_v2_scheduler_proto_depIdxs = []int32{
 	9,  // 14: scheduler.v2.AnnouncePeerRequest.download_piece_back_to_source_finished_request:type_name -> scheduler.v2.DownloadPieceBackToSourceFinishedRequest
 	10, // 15: scheduler.v2.AnnouncePeerRequest.download_piece_failed_request:type_name -> scheduler.v2.DownloadPieceFailedRequest
 	11, // 16: scheduler.v2.AnnouncePeerRequest.download_piece_back_to_source_failed_request:type_name -> scheduler.v2.DownloadPieceBackToSourceFailedRequest
-	32, // 17: scheduler.v2.NormalTaskResponse.candidate_parents:type_name -> common.v2.Peer
+	33, // 17: scheduler.v2.NormalTaskResponse.candidate_parents:type_name -> common.v2.Peer
 	13, // 18: scheduler.v2.AnnouncePeerResponse.empty_task_response:type_name -> scheduler.v2.EmptyTaskResponse
 	14, // 19: scheduler.v2.AnnouncePeerResponse.normal_task_response:type_name -> scheduler.v2.NormalTaskResponse
 	15, // 20: scheduler.v2.AnnouncePeerResponse.need_back_to_source_response:type_name -> scheduler.v2.NeedBackToSourceResponse
-	35, // 21: scheduler.v2.AnnounceHostRequest.host:type_name -> common.v2.Host
-	35, // 22: scheduler.v2.Probe.host:type_name -> common.v2.Host
-	36, // 23: scheduler.v2.Probe.rtt:type_name -> google.protobuf.Duration
-	37, // 24: scheduler.v2.Probe.created_at:type_name -> google.protobuf.Timestamp
-	25, // 25: scheduler.v2.ProbeFinishedRequest.probes:type_name -> scheduler.v2.Probe
-	35, // 26: scheduler.v2.FailedProbe.host:type_name -> common.v2.Host
-	27, // 27: scheduler.v2.ProbeFailedRequest.probes:type_name -> scheduler.v2.FailedProbe
-	35, // 28: scheduler.v2.SyncProbesRequest.host:type_name -> common.v2.Host
-	24, // 29: scheduler.v2.SyncProbesRequest.probe_started_request:type_name -> scheduler.v2.ProbeStartedRequest
-	26, // 30: scheduler.v2.SyncProbesRequest.probe_finished_request:type_name -> scheduler.v2.ProbeFinishedRequest
-	28, // 31: scheduler.v2.SyncProbesRequest.probe_failed_request:type_name -> scheduler.v2.ProbeFailedRequest
-	35, // 32: scheduler.v2.SyncProbesResponse.hosts:type_name -> common.v2.Host
+	36, // 21: scheduler.v2.AnnounceHostRequest.host:type_name -> common.v2.Host
+	36, // 22: scheduler.v2.Probe.host:type_name -> common.v2.Host
+	37, // 23: scheduler.v2.Probe.rtt:type_name -> google.protobuf.Duration
+	38, // 24: scheduler.v2.Probe.created_at:type_name -> google.protobuf.Timestamp
+	26, // 25: scheduler.v2.ProbeFinishedRequest.probes:type_name -> scheduler.v2.Probe
+	36, // 26: scheduler.v2.FailedProbe.host:type_name -> common.v2.Host
+	28, // 27: scheduler.v2.ProbeFailedRequest.probes:type_name -> scheduler.v2.FailedProbe
+	36, // 28: scheduler.v2.SyncProbesRequest.host:type_name -> common.v2.Host
+	25, // 29: scheduler.v2.SyncProbesRequest.probe_started_request:type_name -> scheduler.v2.ProbeStartedRequest
+	27, // 30: scheduler.v2.SyncProbesRequest.probe_finished_request:type_name -> scheduler.v2.ProbeFinishedRequest
+	29, // 31: scheduler.v2.SyncProbesRequest.probe_failed_request:type_name -> scheduler.v2.ProbeFailedRequest
+	36, // 32: scheduler.v2.SyncProbesResponse.hosts:type_name -> common.v2.Host
 	12, // 33: scheduler.v2.Scheduler.AnnouncePeer:input_type -> scheduler.v2.AnnouncePeerRequest
 	17, // 34: scheduler.v2.Scheduler.StatPeer:input_type -> scheduler.v2.StatPeerRequest
 	20, // 35: scheduler.v2.Scheduler.LeavePeer:input_type -> scheduler.v2.LeavePeerRequest
 	18, // 36: scheduler.v2.Scheduler.ExchangePeer:input_type -> scheduler.v2.ExchangePeerRequest
 	21, // 37: scheduler.v2.Scheduler.StatTask:input_type -> scheduler.v2.StatTaskRequest
-	22, // 38: scheduler.v2.Scheduler.AnnounceHost:input_type -> scheduler.v2.AnnounceHostRequest
-	23, // 39: scheduler.v2.Scheduler.LeaveHost:input_type -> scheduler.v2.LeaveHostRequest
-	29, // 40: scheduler.v2.Scheduler.SyncProbes:input_type -> scheduler.v2.SyncProbesRequest
-	16, // 41: scheduler.v2.Scheduler.AnnouncePeer:output_type -> scheduler.v2.AnnouncePeerResponse
-	32, // 42: scheduler.v2.Scheduler.StatPeer:output_type -> common.v2.Peer
-	38, // 43: scheduler.v2.Scheduler.LeavePeer:output_type -> google.protobuf.Empty
-	19, // 44: scheduler.v2.Scheduler.ExchangePeer:output_type -> scheduler.v2.ExchangePeerResponse
-	39, // 45: scheduler.v2.Scheduler.StatTask:output_type -> common.v2.Task
-	38, // 46: scheduler.v2.Scheduler.AnnounceHost:output_type -> google.protobuf.Empty
-	38, // 47: scheduler.v2.Scheduler.LeaveHost:output_type -> google.protobuf.Empty
-	30, // 48: scheduler.v2.Scheduler.SyncProbes:output_type -> scheduler.v2.SyncProbesResponse
-	41, // [41:49] is the sub-list for method output_type
-	33, // [33:41] is the sub-list for method input_type
+	22, // 38: scheduler.v2.Scheduler.LeaveTask:input_type -> scheduler.v2.LeaveTaskRequest
+	23, // 39: scheduler.v2.Scheduler.AnnounceHost:input_type -> scheduler.v2.AnnounceHostRequest
+	24, // 40: scheduler.v2.Scheduler.LeaveHost:input_type -> scheduler.v2.LeaveHostRequest
+	30, // 41: scheduler.v2.Scheduler.SyncProbes:input_type -> scheduler.v2.SyncProbesRequest
+	16, // 42: scheduler.v2.Scheduler.AnnouncePeer:output_type -> scheduler.v2.AnnouncePeerResponse
+	33, // 43: scheduler.v2.Scheduler.StatPeer:output_type -> common.v2.Peer
+	39, // 44: scheduler.v2.Scheduler.LeavePeer:output_type -> google.protobuf.Empty
+	19, // 45: scheduler.v2.Scheduler.ExchangePeer:output_type -> scheduler.v2.ExchangePeerResponse
+	40, // 46: scheduler.v2.Scheduler.StatTask:output_type -> common.v2.Task
+	39, // 47: scheduler.v2.Scheduler.LeaveTask:output_type -> google.protobuf.Empty
+	39, // 48: scheduler.v2.Scheduler.AnnounceHost:output_type -> google.protobuf.Empty
+	39, // 49: scheduler.v2.Scheduler.LeaveHost:output_type -> google.protobuf.Empty
+	31, // 50: scheduler.v2.Scheduler.SyncProbes:output_type -> scheduler.v2.SyncProbesResponse
+	42, // [42:51] is the sub-list for method output_type
+	33, // [33:42] is the sub-list for method input_type
 	33, // [33:33] is the sub-list for extension type_name
 	33, // [33:33] is the sub-list for extension extendee
 	0,  // [0:33] is the sub-list for field type_name
@@ -2734,7 +2805,7 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 			}
 		}
 		file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[22].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AnnounceHostRequest); i {
+			switch v := v.(*LeaveTaskRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -2746,7 +2817,7 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 			}
 		}
 		file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[23].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*LeaveHostRequest); i {
+			switch v := v.(*AnnounceHostRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -2758,7 +2829,7 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 			}
 		}
 		file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[24].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProbeStartedRequest); i {
+			switch v := v.(*LeaveHostRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -2770,7 +2841,7 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 			}
 		}
 		file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[25].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Probe); i {
+			switch v := v.(*ProbeStartedRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -2782,7 +2853,7 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 			}
 		}
 		file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[26].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProbeFinishedRequest); i {
+			switch v := v.(*Probe); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -2794,7 +2865,7 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 			}
 		}
 		file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[27].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FailedProbe); i {
+			switch v := v.(*ProbeFinishedRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -2806,7 +2877,7 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 			}
 		}
 		file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[28].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ProbeFailedRequest); i {
+			switch v := v.(*FailedProbe); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -2818,7 +2889,7 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 			}
 		}
 		file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[29].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*SyncProbesRequest); i {
+			switch v := v.(*ProbeFailedRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -2830,6 +2901,18 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 			}
 		}
 		file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[30].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SyncProbesRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[31].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SyncProbesResponse); i {
 			case 0:
 				return &v.state
@@ -2870,8 +2953,8 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 		(*AnnouncePeerResponse_NormalTaskResponse)(nil),
 		(*AnnouncePeerResponse_NeedBackToSourceResponse)(nil),
 	}
-	file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[27].OneofWrappers = []interface{}{}
-	file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[29].OneofWrappers = []interface{}{
+	file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[28].OneofWrappers = []interface{}{}
+	file_pkg_apis_scheduler_v2_scheduler_proto_msgTypes[30].OneofWrappers = []interface{}{
 		(*SyncProbesRequest_ProbeStartedRequest)(nil),
 		(*SyncProbesRequest_ProbeFinishedRequest)(nil),
 		(*SyncProbesRequest_ProbeFailedRequest)(nil),
@@ -2882,7 +2965,7 @@ func file_pkg_apis_scheduler_v2_scheduler_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_pkg_apis_scheduler_v2_scheduler_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   31,
+			NumMessages:   32,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/pkg/apis/scheduler/v2/scheduler.pb.validate.go b/pkg/apis/scheduler/v2/scheduler.pb.validate.go
index be79ab0..1b09f6f 100644
--- a/pkg/apis/scheduler/v2/scheduler.pb.validate.go
+++ b/pkg/apis/scheduler/v2/scheduler.pb.validate.go
@@ -3480,6 +3480,128 @@ var _ interface {
 	ErrorName() string
 } = StatTaskRequestValidationError{}
 
+// Validate checks the field values on LeaveTaskRequest with the rules defined
+// in the proto definition for this message. If any rules are violated, the
+// first error encountered is returned, or nil if there are no violations.
+func (m *LeaveTaskRequest) Validate() error {
+	return m.validate(false)
+}
+
+// ValidateAll checks the field values on LeaveTaskRequest with the rules
+// defined in the proto definition for this message. If any rules are
+// violated, the result is a list of violation errors wrapped in
+// LeaveTaskRequestMultiError, or nil if none found.
+func (m *LeaveTaskRequest) ValidateAll() error {
+	return m.validate(true)
+}
+
+func (m *LeaveTaskRequest) validate(all bool) error {
+	if m == nil {
+		return nil
+	}
+
+	var errors []error
+
+	if utf8.RuneCountInString(m.GetHostId()) < 1 {
+		err := LeaveTaskRequestValidationError{
+			field:  "HostId",
+			reason: "value length must be at least 1 runes",
+		}
+		if !all {
+			return err
+		}
+		errors = append(errors, err)
+	}
+
+	if utf8.RuneCountInString(m.GetTaskId()) < 1 {
+		err := LeaveTaskRequestValidationError{
+			field:  "TaskId",
+			reason: "value length must be at least 1 runes",
+		}
+		if !all {
+			return err
+		}
+		errors = append(errors, err)
+	}
+
+	if len(errors) > 0 {
+		return LeaveTaskRequestMultiError(errors)
+	}
+
+	return nil
+}
+
+// LeaveTaskRequestMultiError is an error wrapping multiple validation errors
+// returned by LeaveTaskRequest.ValidateAll() if the designated constraints
+// aren't met.
+type LeaveTaskRequestMultiError []error
+
+// Error returns a concatenation of all the error messages it wraps.
+func (m LeaveTaskRequestMultiError) Error() string {
+	var msgs []string
+	for _, err := range m {
+		msgs = append(msgs, err.Error())
+	}
+	return strings.Join(msgs, "; ")
+}
+
+// AllErrors returns a list of validation violation errors.
+func (m LeaveTaskRequestMultiError) AllErrors() []error { return m }
+
+// LeaveTaskRequestValidationError is the validation error returned by
+// LeaveTaskRequest.Validate if the designated constraints aren't met.
+type LeaveTaskRequestValidationError struct {
+	field  string
+	reason string
+	cause  error
+	key    bool
+}
+
+// Field function returns field value.
+func (e LeaveTaskRequestValidationError) Field() string { return e.field }
+
+// Reason function returns reason value.
+func (e LeaveTaskRequestValidationError) Reason() string { return e.reason }
+
+// Cause function returns cause value.
+func (e LeaveTaskRequestValidationError) Cause() error { return e.cause }
+
+// Key function returns key value.
+func (e LeaveTaskRequestValidationError) Key() bool { return e.key }
+
+// ErrorName returns error name.
+func (e LeaveTaskRequestValidationError) ErrorName() string { return "LeaveTaskRequestValidationError" }
+
+// Error satisfies the builtin error interface
+func (e LeaveTaskRequestValidationError) Error() string {
+	cause := ""
+	if e.cause != nil {
+		cause = fmt.Sprintf(" | caused by: %v", e.cause)
+	}
+
+	key := ""
+	if e.key {
+		key = "key for "
+	}
+
+	return fmt.Sprintf(
+		"invalid %sLeaveTaskRequest.%s: %s%s",
+		key,
+		e.field,
+		e.reason,
+		cause)
+}
+
+var _ error = LeaveTaskRequestValidationError{}
+
+var _ interface {
+	Field() string
+	Reason() string
+	Key() bool
+	Cause() error
+	ErrorName() string
+} = LeaveTaskRequestValidationError{}
+
 // Validate checks the field values on AnnounceHostRequest with the rules
 // defined in the proto definition for this message. If any rules are
 // violated, the first error encountered is returned, or nil if there are no violations.
diff --git a/pkg/apis/scheduler/v2/scheduler.proto b/pkg/apis/scheduler/v2/scheduler.proto
index b3b1afa..2f5a865 100644
--- a/pkg/apis/scheduler/v2/scheduler.proto
+++ b/pkg/apis/scheduler/v2/scheduler.proto
@@ -210,6 +210,14 @@ message StatTaskRequest {
   string id = 1 [(validate.rules).string.min_len = 1];
 }
 
+// LeaveTaskRequest represents request of LeaveTask.
+message LeaveTaskRequest {
+  // Host id.
+  string host_id = 1 [(validate.rules).string.min_len = 1];
+  // Task id.
+  string task_id = 2 [(validate.rules).string.min_len = 1];
+}
+
 // AnnounceHostRequest represents request of AnnounceHost.
 message AnnounceHostRequest {
   // Host info.
@@ -294,6 +302,9 @@ service Scheduler {
   // Checks information of task.
   rpc StatTask(StatTaskRequest)returns(common.v2.Task);
 
+  // LeaveTask releases task in scheduler.
+  rpc LeaveTask(LeaveTaskRequest)returns(google.protobuf.Empty);
+
   // AnnounceHost announces host to scheduler.
   rpc AnnounceHost(AnnounceHostRequest)returns(google.protobuf.Empty);
 
diff --git a/pkg/apis/scheduler/v2/scheduler_grpc.pb.go b/pkg/apis/scheduler/v2/scheduler_grpc.pb.go
index 9439a00..67baa89 100644
--- a/pkg/apis/scheduler/v2/scheduler_grpc.pb.go
+++ b/pkg/apis/scheduler/v2/scheduler_grpc.pb.go
@@ -35,6 +35,8 @@ type SchedulerClient interface {
 	ExchangePeer(ctx context.Context, in *ExchangePeerRequest, opts ...grpc.CallOption) (*ExchangePeerResponse, error)
 	// Checks information of task.
 	StatTask(ctx context.Context, in *StatTaskRequest, opts ...grpc.CallOption) (*v2.Task, error)
+	// LeaveTask releases task in scheduler.
+	LeaveTask(ctx context.Context, in *LeaveTaskRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
 	// AnnounceHost announces host to scheduler.
 	AnnounceHost(ctx context.Context, in *AnnounceHostRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
 	// LeaveHost releases host in scheduler.
@@ -118,6 +120,15 @@ func (c *schedulerClient) StatTask(ctx context.Context, in *StatTaskRequest, opt
 	return out, nil
 }
 
+func (c *schedulerClient) LeaveTask(ctx context.Context, in *LeaveTaskRequest, opts ...grpc.CallOption) (*emptypb.Empty, error) {
+	out := new(emptypb.Empty)
+	err := c.cc.Invoke(ctx, "/scheduler.v2.Scheduler/LeaveTask", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *schedulerClient) AnnounceHost(ctx context.Context, in *AnnounceHostRequest, opts ...grpc.CallOption) (*emptypb.Empty, error) {
 	out := new(emptypb.Empty)
 	err := c.cc.Invoke(ctx, "/scheduler.v2.Scheduler/AnnounceHost", in, out, opts...)
@@ -182,6 +193,8 @@ type SchedulerServer interface {
 	ExchangePeer(context.Context, *ExchangePeerRequest) (*ExchangePeerResponse, error)
 	// Checks information of task.
 	StatTask(context.Context, *StatTaskRequest) (*v2.Task, error)
+	// LeaveTask releases task in scheduler.
+	LeaveTask(context.Context, *LeaveTaskRequest) (*emptypb.Empty, error)
 	// AnnounceHost announces host to scheduler.
 	AnnounceHost(context.Context, *AnnounceHostRequest) (*emptypb.Empty, error)
 	// LeaveHost releases host in scheduler.
@@ -209,6 +222,9 @@ func (UnimplementedSchedulerServer) ExchangePeer(context.Context, *ExchangePeerR
 func (UnimplementedSchedulerServer) StatTask(context.Context, *StatTaskRequest) (*v2.Task, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method StatTask not implemented")
 }
+func (UnimplementedSchedulerServer) LeaveTask(context.Context, *LeaveTaskRequest) (*emptypb.Empty, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method LeaveTask not implemented")
+}
 func (UnimplementedSchedulerServer) AnnounceHost(context.Context, *AnnounceHostRequest) (*emptypb.Empty, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method AnnounceHost not implemented")
 }
@@ -328,6 +344,24 @@ func _Scheduler_StatTask_Handler(srv interface{}, ctx context.Context, dec func(
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Scheduler_LeaveTask_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(LeaveTaskRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SchedulerServer).LeaveTask(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/scheduler.v2.Scheduler/LeaveTask",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SchedulerServer).LeaveTask(ctx, req.(*LeaveTaskRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _Scheduler_AnnounceHost_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(AnnounceHostRequest)
 	if err := dec(in); err != nil {
@@ -413,6 +447,10 @@ var Scheduler_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "StatTask",
 			Handler:    _Scheduler_StatTask_Handler,
 		},
+		{
+			MethodName: "LeaveTask",
+			Handler:    _Scheduler_LeaveTask_Handler,
+		},
 		{
 			MethodName: "AnnounceHost",
 			Handler:    _Scheduler_AnnounceHost_Handler,
diff --git a/proto/scheduler.proto b/proto/scheduler.proto
index efe484c..d2457d8 100644
--- a/proto/scheduler.proto
+++ b/proto/scheduler.proto
@@ -201,6 +201,14 @@ message StatTaskRequest {
   string id = 1;
 }
 
+// LeaveTaskRequest represents request of LeaveTask.
+message LeaveTaskRequest {
+  // Host id.
+  string host_id = 1;
+  // Task id.
+  string task_id = 2;
+}
+
 // AnnounceHostRequest represents request of AnnounceHost.
 message AnnounceHostRequest {
   // Host information.
@@ -283,6 +291,9 @@ service Scheduler{
   // Checks information of task.
   rpc StatTask(StatTaskRequest)returns(common.v2.Task);
 
+  // LeaveTask releases task in scheduler.
+  rpc LeaveTask(LeaveTaskRequest)returns(google.protobuf.Empty);
+
   // AnnounceHost announces host to scheduler.
   rpc AnnounceHost(AnnounceHostRequest)returns(google.protobuf.Empty);
 
diff --git a/src/descriptor.bin b/src/descriptor.bin
index e5ccc58..177e75c 100644
Binary files a/src/descriptor.bin and b/src/descriptor.bin differ
diff --git a/src/scheduler.v2.rs b/src/scheduler.v2.rs
index 6357ae1..1188042 100644
--- a/src/scheduler.v2.rs
+++ b/src/scheduler.v2.rs
@@ -302,6 +302,18 @@ pub struct StatTaskRequest {
     #[prost(string, tag = "1")]
     pub id: ::prost::alloc::string::String,
 }
+/// LeaveTaskRequest represents request of LeaveTask.
+#[derive(serde::Serialize, serde::Deserialize)]
+#[allow(clippy::derive_partial_eq_without_eq)]
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct LeaveTaskRequest {
+    /// Host id.
+    #[prost(string, tag = "1")]
+    pub host_id: ::prost::alloc::string::String,
+    /// Task id.
+    #[prost(string, tag = "2")]
+    pub task_id: ::prost::alloc::string::String,
+}
 /// AnnounceHostRequest represents request of AnnounceHost.
 #[derive(serde::Serialize, serde::Deserialize)]
 #[allow(clippy::derive_partial_eq_without_eq)]
@@ -620,6 +632,29 @@ pub mod scheduler_client {
                 .insert(GrpcMethod::new("scheduler.v2.Scheduler", "StatTask"));
             self.inner.unary(req, path, codec).await
         }
+        /// LeaveTask releases task in scheduler.
+        pub async fn leave_task(
+            &mut self,
+            request: impl tonic::IntoRequest<super::LeaveTaskRequest>,
+        ) -> std::result::Result<tonic::Response<()>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::new(
+                        tonic::Code::Unknown,
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/scheduler.v2.Scheduler/LeaveTask",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("scheduler.v2.Scheduler", "LeaveTask"));
+            self.inner.unary(req, path, codec).await
+        }
         /// AnnounceHost announces host to scheduler.
         pub async fn announce_host(
             &mut self,
@@ -745,6 +780,11 @@ pub mod scheduler_server {
             tonic::Response<super::super::super::common::v2::Task>,
             tonic::Status,
         >;
+        /// LeaveTask releases task in scheduler.
+        async fn leave_task(
+            &self,
+            request: tonic::Request<super::LeaveTaskRequest>,
+        ) -> std::result::Result<tonic::Response<()>, tonic::Status>;
         /// AnnounceHost announces host to scheduler.
         async fn announce_host(
             &self,
@@ -1074,6 +1114,50 @@ pub mod scheduler_server {
                     };
                     Box::pin(fut)
                 }
+                "/scheduler.v2.Scheduler/LeaveTask" => {
+                    #[allow(non_camel_case_types)]
+                    struct LeaveTaskSvc<T: Scheduler>(pub Arc<T>);
+                    impl<
+                        T: Scheduler,
+                    > tonic::server::UnaryService<super::LeaveTaskRequest>
+                    for LeaveTaskSvc<T> {
+                        type Response = ();
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::LeaveTaskRequest>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move { (*inner).leave_task(request).await };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let inner = inner.0;
+                        let method = LeaveTaskSvc(inner);
+                        let codec = tonic::codec::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
                 "/scheduler.v2.Scheduler/AnnounceHost" => {
                     #[allow(non_camel_case_types)]
                     struct AnnounceHostSvc<T: Scheduler>(pub Arc<T>);