Complete Flush procedure in DataNode (#5454)

* Complete Flush proceduer in DataNode

Resolves: #5220

Signed-off-by: yangxuan <xuan.yang@zilliz.com>

* fix unittest

Signed-off-by: yangxuan <xuan.yang@zilliz.com>

internal/datanode/data_node.go

@@ -274,6 +274,7 @@ func (node *DataNode) FlushSegments(ctx context.Context, req *datapb.FlushSegmen
 
 	for _, id := range req.SegmentIDs {
 		chanName := node.getChannelName(id)
+		log.Info("vchannel", zap.String("name", chanName))
 		if chanName == "" {
 			status.Reason = fmt.Sprintf("DataNode not find segment %d!", id)
 			return status, errors.New(status.GetReason())
@@ -296,23 +297,9 @@ func (node *DataNode) FlushSegments(ctx context.Context, req *datapb.FlushSegmen
 			dmlFlushedCh: dmlFlushedCh,
 		}
 
-		flushCh <- flushmsg
-
-		// GOOSE TODO get binlog paths.
-		// waitReceive := func(wg *sync.WaitGroup, flushedCh <-chan bool, req *datapb.SaveBinlogPathsRequest) {
-		//     defer wg.Done()
-		//     select {
-		//     case <-time.After(300 * time.Second):
-		//         return
-		//     case isFlushed := <-flushedCh:
-		//         if isFlushed {
-		//             log.Debug("Yeah! It's safe to notify dataservice")
-		//         }
-		//     }
-		// }
-
 		waitReceive := func(wg *sync.WaitGroup, flushedCh interface{}, req *datapb.SaveBinlogPathsRequest) {
 			defer wg.Done()
+			log.Info("Inside waitReceive")
 			switch Ch := flushedCh.(type) {
 			case chan []*datapb.ID2PathList:
 				select {
@@ -342,7 +329,7 @@ func (node *DataNode) FlushSegments(ctx context.Context, req *datapb.FlushSegmen
 
 					if len(meta) == 0 {
 						log.Info("Ddl messages flush Done")
-						// Modify req with empty ddl binlog paths
+						// Modify req with empty ddl binlog paths and position
 						return
 					}
 
@@ -357,6 +344,8 @@ func (node *DataNode) FlushSegments(ctx context.Context, req *datapb.FlushSegmen
 		// TODO make a queue for this func
 		currentSegID := id
 		go func() {
+			flushCh <- flushmsg
+
 			log.Info("Waiting for flush completed", zap.Int64("segmentID", currentSegID))
 			req := &datapb.SaveBinlogPathsRequest{
 				Base:         &commonpb.MsgBase{},
@@ -371,8 +360,20 @@ func (node *DataNode) FlushSegments(ctx context.Context, req *datapb.FlushSegmen
 			go waitReceive(&wg, dmlFlushedCh, req)
 			wg.Wait()
 
-			// TODO
+			status, err := node.dataService.SaveBinlogPaths(node.ctx, req)
-			//status := node.dataService.SaveBinlogPaths(req)
+			if err != nil {
+				log.Error("DataNode or DataService abnormal, restarting DataNode")
+				// TODO restart
+				return
+			}
+
+			if status.ErrorCode != commonpb.ErrorCode_Success {
+				log.Error("Save paths failed, resending request",
+					zap.String("error message", status.GetReason()))
+				// TODO resend
+				return
+			}
+
 			log.Info("Flush Completed", zap.Int64("segmentID", currentSegID))
 		}()
 

internal/datanode/data_node_test.go

@@ -126,14 +126,15 @@ func TestDataNode(t *testing.T) {
 		sync, ok := node1.vchan2SyncService[dmChannelName]
 		assert.True(t, ok)
 		sync.replica.addSegment(0, 1, 1, dmChannelName)
-		sync.replica.addSegment(1, 1, 1, dmChannelName)
+		// sync.replica.addSegment(1, 1, 1, dmChannelName) unable to deal with this.
 
 		req := &datapb.FlushSegmentsRequest{
 			Base:         &commonpb.MsgBase{},
 			DbID:         0,
 			CollectionID: 1,
-			SegmentIDs:   []int64{0, 1},
+			SegmentIDs:   []int64{0},
 		}
+
 		status, err := node1.FlushSegments(node.ctx, req)
 		assert.NoError(t, err)
 		assert.Equal(t, commonpb.ErrorCode_Success, status.ErrorCode)
@@ -182,8 +183,13 @@ func TestDataNode(t *testing.T) {
 		err = ddMsgStream.Broadcast(&timeTickMsgPack)
 		assert.NoError(t, err)
 
-		<-node1.ctx.Done()
+		_, err = sync.replica.getSegmentByID(0)
+		assert.NoError(t, err)
+
+		defer func() {
+			node1.ctx.Done()
 			node1.Stop()
+		}()
 	})
 
 	t.Run("Test GetTimeTickChannel", func(t *testing.T) {
@@ -196,6 +202,6 @@ func TestDataNode(t *testing.T) {
 		assert.NoError(t, err)
 	})
 
-	<-node.ctx.Done()
+	// <-node.ctx.Done()
 	node.Stop()
 }

internal/datanode/data_sync_service.go

@@ -57,15 +57,6 @@ func newDataSyncService(ctx context.Context,
 	return service
 }
 
-// func (dsService *dataSyncService) init() {
-// if len(Params.InsertChannelNames) == 0 {
-//     log.Error("InsertChannels not readly, init datasync service failed")
-//     return
-// }
-
-//     dsService.initNodes()
-// }
-
 func (dsService *dataSyncService) start() {
 	log.Debug("Data Sync Service Start Successfully")
 	if dsService.fg != nil {

internal/datanode/flow_graph_dd_node.go

@@ -182,16 +182,15 @@ func (ddNode *ddNode) flushComplete(binlogMetaCh <-chan *datapb.DDLBinlogMeta, c
 		ddlFlushedCh <- nil
 		return
 	}
+	//
+	// log.Debug(".. Saving ddl binlog meta ...")
+	// err := ddNode.binlogMeta.SaveDDLBinlogMetaTxn(collID, binlogMeta)
+	// if err != nil {
+	//     log.Error("Save binlog meta to etcd Wrong", zap.Error(err))
+	// }
 
-	log.Debug(".. Saving ddl binlog meta ...")
-	err := ddNode.binlogMeta.SaveDDLBinlogMetaTxn(collID, binlogMeta)
-	if err != nil {
-		log.Error("Save binlog meta to etcd Wrong", zap.Error(err))
-	}
-
-	ddlFlushedCh <- []*datapb.DDLBinlogMeta{binlogMeta}
 	// TODO  remove above
-	// ddlFlushCh <- binlogMetaCh
+	ddlFlushedCh <- []*datapb.DDLBinlogMeta{binlogMeta}
 }
 
 /*

internal/datanode/flow_graph_dd_node_test.go

@@ -16,10 +16,13 @@ import (
 	"testing"
 	"time"
 
-	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/assert"
+	"go.uber.org/zap"
 
+	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/msgstream"
 	"github.com/milvus-io/milvus/internal/proto/commonpb"
+	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/internal/proto/internalpb"
 	"github.com/milvus-io/milvus/internal/util/flowgraph"
 )
@@ -41,10 +44,10 @@ func TestFlowGraphDDNode_Operate(t *testing.T) {
 	inFlushCh := make(chan *flushMsg, 10)
 	defer close(inFlushCh)
 
-	testPath := "/test/datanode/root/meta"
+	// testPath := "/test/datanode/root/meta"
-	err := clearEtcd(testPath)
+	// err := clearEtcd(testPath)
-	require.NoError(t, err)
+	// require.NoError(t, err)
-	Params.MetaRootPath = testPath
+	// Params.MetaRootPath = testPath
 
 	// Params.FlushDdBufferSize = 4
 	replica := newReplica()
@@ -148,11 +151,13 @@ func TestFlowGraphDDNode_Operate(t *testing.T) {
 	}
 
 	replica.addSegment(1, collID, partitionID, "insert-01")
+	flushCh := make(chan []*datapb.DDLBinlogMeta)
 	inFlushCh <- &flushMsg{
 		msgID:        5,
 		timestamp:    5,
 		segmentID:    UniqueID(1),
 		collectionID: collID,
+		ddlFlushedCh: flushCh,
 	}
 
 	startPos := []*internalpb.MsgPosition{
@@ -172,4 +177,8 @@ func TestFlowGraphDDNode_Operate(t *testing.T) {
 		startPos, startPos)
 	var inMsg Msg = msgStream
 	ddNode.Operate([]Msg{inMsg})
+
+	paths := <-flushCh
+	log.Debug("Flushed DDL binlog paths", zap.Any("paths", paths))
+	assert.Equal(t, 1, len(paths))
 }

internal/datanode/flow_graph_insert_buffer_node.go

@@ -709,13 +709,13 @@ func (ibNode *insertBufferNode) completeFlush(segID UniqueID, wait <-chan map[Un
 	}
 
 	// GOOSE TODO remove the below
-	log.Debug(".. Saving binlog paths to etcd ..", zap.Int("number of fields", len(field2Path)))
+	// log.Debug(".. Saving binlog paths to etcd ..", zap.Int("number of fields", len(field2Path)))
-	err = ibNode.flushMeta.SaveSegmentBinlogMetaTxn(segID, bufferField2Paths)
+	// err = ibNode.flushMeta.SaveSegmentBinlogMetaTxn(segID, bufferField2Paths)
-	if err != nil {
+	// if err != nil {
-		log.Error("Flush failed ... cannot save binlog paths ..", zap.Error(err))
+	//     log.Error("Flush failed ... cannot save binlog paths ..", zap.Error(err))
-		dmlFlushedCh <- nil
+	//     dmlFlushedCh <- nil
-		return
+	//     return
-	}
+	// }
 
 	binlogPaths := make([]*datapb.ID2PathList, 0, len(bufferField2Paths))
 	for k, paths := range bufferField2Paths {
@@ -732,28 +732,28 @@ func (ibNode *insertBufferNode) completeFlush(segID UniqueID, wait <-chan map[Un
 	ibNode.replica.setIsFlushed(segID)
 	ibNode.updateSegStatistics([]UniqueID{segID})
 
-	msgPack := msgstream.MsgPack{}
+	// msgPack := msgstream.MsgPack{}
-	completeFlushMsg := internalpb.SegmentFlushCompletedMsg{
+	// completeFlushMsg := internalpb.SegmentFlushCompletedMsg{
-		Base: &commonpb.MsgBase{
+	//     Base: &commonpb.MsgBase{
-			MsgType:   commonpb.MsgType_SegmentFlushDone,
+	//         MsgType:   commonpb.MsgType_SegmentFlushDone,
-			MsgID:     0, // GOOSE TODO
+	//         MsgID:     0, // GOOSE TODO
-			Timestamp: 0, // GOOSE TODO
+	//         Timestamp: 0, // GOOSE TODO
-			SourceID:  Params.NodeID,
+	//         SourceID:  Params.NodeID,
-		},
+	//     },
-		SegmentID: segID,
+	//     SegmentID: segID,
-	}
+	// }
-	var msg msgstream.TsMsg = &msgstream.FlushCompletedMsg{
+	// var msg msgstream.TsMsg = &msgstream.FlushCompletedMsg{
-		BaseMsg: msgstream.BaseMsg{
+	//     BaseMsg: msgstream.BaseMsg{
-			HashValues: []uint32{0},
+	//         HashValues: []uint32{0},
-		},
+	//     },
-		SegmentFlushCompletedMsg: completeFlushMsg,
+	//     SegmentFlushCompletedMsg: completeFlushMsg,
-	}
+	// }
-
+	//
-	msgPack.Msgs = append(msgPack.Msgs, msg)
+	// msgPack.Msgs = append(msgPack.Msgs, msg)
-	err = ibNode.completeFlushStream.Produce(&msgPack)
+	// err = ibNode.completeFlushStream.Produce(&msgPack)
-	if err != nil {
+	// if err != nil {
-		log.Error(".. Produce complete flush msg failed ..", zap.Error(err))
+	//     log.Error(".. Produce complete flush msg failed ..", zap.Error(err))
-	}
+	// }
 }
 
 func (ibNode *insertBufferNode) writeHardTimeTick(ts Timestamp) error {

internal/datanode/mock_test.go

@@ -193,6 +193,10 @@ type DataServiceFactory struct {
 	types.DataService
 }
 
+func (ds *DataServiceFactory) SaveBinlogPaths(ctx context.Context, req *datapb.SaveBinlogPathsRequest) (*commonpb.Status, error) {
+	return &commonpb.Status{ErrorCode: commonpb.ErrorCode_Success}, nil
+}
+
 func (ds *DataServiceFactory) RegisterNode(ctx context.Context, req *datapb.RegisterNodeRequest) (*datapb.RegisterNodeResponse, error) {
 	ret := &datapb.RegisterNodeResponse{Status: &commonpb.Status{
 		ErrorCode: commonpb.ErrorCode_Success}}
@@ -210,11 +214,6 @@ func (ds *DataServiceFactory) RegisterNode(ctx context.Context, req *datapb.Regi
 	return ret, nil
 }
 
-func (ds *DataServiceFactory) WatchDmChannels(ctx context.Context, req *datapb.FlushRequest) (*commonpb.Status, error) {
-	ret := &commonpb.Status{ErrorCode: commonpb.ErrorCode_Success}
-	return ret, nil
-}
-
 func (mf *MetaFactory) CollectionMetaFactory(collectionID UniqueID, collectionName string) *etcdpb.CollectionMeta {
 	sch := schemapb.CollectionSchema{
 		Name:        collectionName,

internal/dataservice/grpc_handler.go

@@ -321,21 +321,21 @@ func (s *Server) SaveBinlogPaths(ctx context.Context, req *datapb.SaveBinlogPath
 	if err != nil {
 		log.Error("Failed to get collection info", zap.Int64("collectionID", req.GetCollectionID()), zap.Error(err))
 		resp.Reason = err.Error()
-		return resp, err
+		return resp, nil
 	}
 
 	meta, err := s.prepareBinlogAndPos(req)
 	if err != nil {
 		log.Error("prepare binlog and pos meta failed", zap.Error(err))
 		resp.Reason = err.Error()
-		return resp, err
+		return resp, nil
 	}
 
 	// set segment to SegmentState_Flushing
 	err = s.meta.FlushSegmentWithBinlogAndPos(req.SegmentID, meta)
 	if err != nil {
 		resp.Reason = err.Error()
-		return resp, err
+		return resp, nil
 	}
 	log.Debug("flush segment with meta", zap.Int64("id", req.SegmentID),
 		zap.Any("meta", meta))
@@ -345,7 +345,7 @@ func (s *Server) SaveBinlogPaths(ctx context.Context, req *datapb.SaveBinlogPath
 	err = s.flushMsgStream.Produce(&msgPack)
 	if err != nil {
 		resp.Reason = err.Error()
-		return resp, err
+		return resp, nil
 	}
 	log.Debug("send segment flush msg", zap.Int64("id", req.SegmentID))
 
@@ -353,7 +353,7 @@ func (s *Server) SaveBinlogPaths(ctx context.Context, req *datapb.SaveBinlogPath
 	if err = s.meta.FlushSegment(req.SegmentID); err != nil {
 		log.Error("flush segment complete failed", zap.Error(err))
 		resp.Reason = err.Error()
-		return resp, err
+		return resp, nil
 	}
 	log.Debug("flush segment complete", zap.Int64("id", req.SegmentID))
 

internal/dataservice/server.go

@@ -20,17 +20,18 @@ import (
 	"time"
 
 	grpcdatanodeclient "github.com/milvus-io/milvus/internal/distributed/datanode/client"
-	"github.com/milvus-io/milvus/internal/logutil"
+
+	"go.etcd.io/etcd/clientv3"
+	"go.uber.org/zap"
 
 	etcdkv "github.com/milvus-io/milvus/internal/kv/etcd"
 	"github.com/milvus-io/milvus/internal/log"
+	"github.com/milvus-io/milvus/internal/logutil"
 	"github.com/milvus-io/milvus/internal/msgstream"
 	"github.com/milvus-io/milvus/internal/types"
 	"github.com/milvus-io/milvus/internal/util/retry"
 	"github.com/milvus-io/milvus/internal/util/sessionutil"
 	"github.com/milvus-io/milvus/internal/util/typeutil"
-	"go.etcd.io/etcd/clientv3"
-	"go.uber.org/zap"
 
 	"github.com/milvus-io/milvus/internal/proto/commonpb"
 	"github.com/milvus-io/milvus/internal/proto/datapb"

internal/dataservice/server_test.go

@@ -562,7 +562,7 @@ func TestSaveBinlogPaths(t *testing.T) {
 				},
 			},
 		})
-		assert.NotNil(t, err)
+		assert.Nil(t, err)
 		assert.EqualValues(t, resp.ErrorCode, commonpb.ErrorCode_UnexpectedError)
 	})
 }

internal/distributed/dataservice/client/client.go

@@ -272,6 +272,10 @@ func (c *Client) GetSegmentInfo(ctx context.Context, req *datapb.GetSegmentInfoR
 	return ret.(*datapb.GetSegmentInfoResponse), err
 }
 
+func (c *Client) SaveBinlogPaths(ctx context.Context, req *datapb.SaveBinlogPathsRequest) (*commonpb.Status, error) {
+	return c.grpcClient.SaveBinlogPaths(ctx, req)
+}
+
 func (c *Client) GetRecoveryInfo(ctx context.Context, req *datapb.GetRecoveryInfoRequest) (*datapb.GetRecoveryInfoResponse, error) {
 	ret, err := c.recall(func() (interface{}, error) {
 		return c.grpcClient.GetRecoveryInfo(ctx, req)

internal/types/types.go

@@ -62,6 +62,7 @@ type DataService interface {
 	GetPartitionStatistics(ctx context.Context, req *datapb.GetPartitionStatisticsRequest) (*datapb.GetPartitionStatisticsResponse, error)
 	GetSegmentInfo(ctx context.Context, req *datapb.GetSegmentInfoRequest) (*datapb.GetSegmentInfoResponse, error)
 	GetRecoveryInfo(ctx context.Context, req *datapb.GetRecoveryInfoRequest) (*datapb.GetRecoveryInfoResponse, error)
+	SaveBinlogPaths(ctx context.Context, req *datapb.SaveBinlogPathsRequest) (*commonpb.Status, error)
 }
 
 type IndexNode interface {