fix unexpected metrics value cause by wrong time unit (#25240)

Signed-off-by: NWei Liu <wei.liu@zilliz.com>

Makefile

@@ -359,6 +359,7 @@ generate-mockery: getdeps
 	# internal/datacoord
 	$(PWD)/bin/mockery --dir=internal/datacoord --name=compactionPlanContext --filename=mock_compaction_plan_context.go --output=internal/datacoord  --structname=MockCompactionPlanContext --with-expecter --inpackage
 	$(PWD)/bin/mockery --dir=internal/datacoord --name=Handler --filename=mock_handler.go --output=internal/datacoord  --structname=NMockHandler --with-expecter --inpackage
+	$(PWD)/bin/mockery --name=DataCoordComponent --dir=$(PWD)/internal/types --output=$(PWD)/internal/types --filename=mock_datacoord.go --with-expecter --structname=MockDataCoord --outpkg=types --inpackage
 	#internal/proxy
 	$(PWD)/bin/mockery --name=LBPolicy --dir=$(PWD)/internal/proxy --output=$(PWD)/internal/proxy --filename=mock_lb_policy.go --structname=MockLBPolicy --with-expecter --outpkg=proxy --inpackage
 	$(PWD)/bin/mockery --name=LBBalancer --dir=$(PWD)/internal/proxy --output=$(PWD)/internal/proxy --filename=mock_lb_balancer.go --structname=MockLBBalancer --with-expecter --outpkg=proxy  --inpackage

internal/datanode/timetick_sender.go

@@ -66,7 +66,7 @@ func (m *timeTickSender) start(ctx context.Context) {
 			log.Info("timeTickSender context done")
 			return
 		case t := <-ticker.C:
-			m.sendReport(ctx, uint64(t.Unix()))
+			m.sendReport(ctx, uint64(t.UnixMilli()))
 		}
 	}
 }

internal/datanode/timetick_sender_test.go

@@ -22,8 +22,12 @@ import (
 	"time"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+	"go.uber.org/atomic"
 
 	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
+	"github.com/milvus-io/milvus/internal/proto/datapb"
+	"github.com/milvus-io/milvus/internal/types"
 )
 
 func TestTimetickManagerNormal(t *testing.T) {
@@ -159,3 +163,25 @@ func TestTimetickManagerSendNotSuccess(t *testing.T) {
 	err := manager.sendReport(ctx, 100)
 	assert.Error(t, err)
 }
+
+func TestTimetickManagerSendReport(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	mockDataCoord := types.NewMockDataCoord(t)
+	tsInMill := time.Now().UnixMilli()
+
+	validTs := atomic.NewBool(false)
+	mockDataCoord.EXPECT().ReportDataNodeTtMsgs(mock.Anything, mock.Anything).Run(func(ctx context.Context, req *datapb.ReportDataNodeTtMsgsRequest) {
+		if req.GetBase().Timestamp > uint64(tsInMill) {
+			validTs.Store(true)
+		}
+	}).Return(&commonpb.Status{
+		ErrorCode: commonpb.ErrorCode_Success,
+	}, nil)
+	manager := newTimeTickManager(mockDataCoord, 0)
+	go manager.start(ctx)
+
+	assert.Eventually(t, func() bool {
+		return validTs.Load()
+	}, 2*time.Second, 500*time.Millisecond)
+}