fix: level 0 segments not loaded (#29908)

the recent changes move the level 0 segments list to a new proto field,
which leads to the QueryCoord can't see the level 0 segments, handle the
new changes
fix #29907

Signed-off-by: yah01 <yang.cen@zilliz.com>

internal/querycoordv2/meta/target_manager.go

@@ -24,6 +24,7 @@ import (
 	"github.com/samber/lo"
 	"go.uber.org/zap"
 
+	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
 	"github.com/milvus-io/milvus/internal/proto/datapb"
 	"github.com/milvus-io/milvus/pkg/common"
 	"github.com/milvus-io/milvus/pkg/log"
@@ -205,6 +206,15 @@ func (mgr *TargetManager) PullNextTargetV2(broker Broker, collectionID int64, ch
 
 		for _, info := range vChannelInfos {
 			channelInfos[info.GetChannelName()] = append(channelInfos[info.GetChannelName()], info)
+			for _, segmentID := range info.GetLevelZeroSegmentIds() {
+				segments[segmentID] = &datapb.SegmentInfo{
+					ID:            segmentID,
+					CollectionID:  collectionID,
+					InsertChannel: info.GetChannelName(),
+					State:         commonpb.SegmentState_Flushed,
+					Level:         datapb.SegmentLevel_L0,
+				}
+			}
 		}
 
 		partitionSet := typeutil.NewUniqueSet(chosenPartitionIDs...)

internal/querycoordv2/meta/target_manager_test.go

@@ -44,10 +44,11 @@ type TargetManagerSuite struct {
 	suite.Suite
 
 	// Data
-	collections []int64
-	partitions  map[int64][]int64
-	channels    map[int64][]string
-	segments    map[int64]map[int64][]int64 // CollectionID, PartitionID -> Segments
+	collections    []int64
+	partitions     map[int64][]int64
+	channels       map[int64][]string
+	segments       map[int64]map[int64][]int64 // CollectionID, PartitionID -> Segments
+	level0Segments []int64
 	// Derived data
 	allChannels []string
 	allSegments []int64
@@ -80,6 +81,7 @@ func (suite *TargetManagerSuite) SetupSuite() {
 			103: {7, 8},
 		},
 	}
+	suite.level0Segments = []int64{10000, 10001}
 
 	suite.allChannels = make([]string, 0)
 	suite.allSegments = make([]int64, 0)
@@ -118,8 +120,9 @@ func (suite *TargetManagerSuite) SetupTest() {
 		dmChannels := make([]*datapb.VchannelInfo, 0)
 		for _, channel := range suite.channels[collection] {
 			dmChannels = append(dmChannels, &datapb.VchannelInfo{
-				CollectionID: collection,
-				ChannelName:  channel,
+				CollectionID:        collection,
+				ChannelName:         channel,
+				LevelZeroSegmentIds: suite.level0Segments,
 			})
 		}
 
@@ -265,7 +268,7 @@ func (suite *TargetManagerSuite) TestRemovePartition() {
 	suite.assertChannels([]string{}, suite.mgr.GetDmChannelsByCollection(collectionID, CurrentTarget))
 
 	suite.mgr.RemovePartition(collectionID, 100)
-	suite.assertSegments([]int64{3, 4}, suite.mgr.GetSealedSegmentsByCollection(collectionID, NextTarget))
+	suite.assertSegments(append([]int64{3, 4}, suite.level0Segments...), suite.mgr.GetSealedSegmentsByCollection(collectionID, NextTarget))
 	suite.assertChannels(suite.channels[collectionID], suite.mgr.GetDmChannelsByCollection(collectionID, NextTarget))
 	suite.assertSegments([]int64{}, suite.mgr.GetSealedSegmentsByCollection(collectionID, CurrentTarget))
 	suite.assertChannels([]string{}, suite.mgr.GetDmChannelsByCollection(collectionID, CurrentTarget))
@@ -310,7 +313,7 @@ func (suite *TargetManagerSuite) getAllSegment(collectionID int64, partitionIDs
 		}
 	}
 
-	return allSegments
+	return append(allSegments, suite.level0Segments...)
 }
 
 func (suite *TargetManagerSuite) assertChannels(expected []string, actual map[string]*DmChannel) bool {

internal/querycoordv2/task/executor.go

@@ -190,6 +190,7 @@ func (ex *Executor) loadSegment(task *SegmentTask, step int) error {
 		return err
 	}
 	segment := resp.GetInfos()[0]
+	log = log.With(zap.String("level", segment.GetLevel().String()))
 
 	indexes, err := ex.broker.GetIndexInfo(ctx, task.CollectionID(), segment.GetID())
 	if err != nil {
@@ -224,7 +225,7 @@ func (ex *Executor) loadSegment(task *SegmentTask, step int) error {
 		segmentIndex.IndexParams = funcutil.Map2KeyValuePair(params)
 	}
 
-	loadInfo := utils.PackSegmentLoadInfo(resp.GetInfos()[0], channel.GetSeekPosition(), indexes)
+	loadInfo := utils.PackSegmentLoadInfo(segment, channel.GetSeekPosition(), indexes)
 
 	req := packLoadSegmentRequest(
 		task,