fix: Fix update loading collection's load config doesn't work (#38737)

issue: #38594 
pr: #38595

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

internal/querycoordv2/services.go

@@ -253,7 +253,7 @@ func (s *Server) LoadCollection(ctx context.Context, req *querypb.LoadCollection
 
 	var loadJob job.Job
 	collection := s.meta.GetCollection(ctx, req.GetCollectionID())
-	if collection != nil && collection.GetStatus() == querypb.LoadStatus_Loaded {
+	if collection != nil {
 		// if collection is loaded, check if collection is loaded with the same replica number and resource groups
 		// if replica number or resource group changes， switch to update load config
 		collectionUsedRG := s.meta.ReplicaManager.GetResourceGroupByCollection(ctx, collection.GetCollectionID()).Collect()
@@ -1180,7 +1180,7 @@ func (s *Server) UpdateLoadConfig(ctx context.Context, req *querypb.UpdateLoadCo
 	jobs := make([]job.Job, 0, len(req.GetCollectionIDs()))
 	for _, collectionID := range req.GetCollectionIDs() {
 		collection := s.meta.GetCollection(ctx, collectionID)
-		if collection == nil || collection.GetStatus() != querypb.LoadStatus_Loaded {
+		if collection == nil {
 			err := merr.WrapErrCollectionNotLoaded(collectionID)
 			log.Warn("failed to update load config", zap.Error(err))
 			continue

internal/querycoordv2/services_test.go

@@ -857,58 +857,6 @@ func (suite *ServiceSuite) TestTransferReplica() {
 	suite.ErrorIs(merr.Error(resp), merr.ErrServiceNotReady)
 }
 
-func (suite *ServiceSuite) TestLoadCollectionFailed() {
-	suite.loadAll()
-	ctx := context.Background()
-	server := suite.server
-
-	// Test load with different replica number
-	for _, collection := range suite.collections {
-		req := &querypb.LoadCollectionRequest{
-			CollectionID:  collection,
-			ReplicaNumber: suite.replicaNumber[collection] + 1,
-		}
-		resp, err := server.LoadCollection(ctx, req)
-		suite.NoError(err)
-		suite.ErrorIs(merr.Error(resp), merr.ErrParameterInvalid)
-	}
-
-	req := &querypb.LoadCollectionRequest{
-		CollectionID:   1001,
-		ReplicaNumber:  2,
-		ResourceGroups: []string{meta.DefaultResourceGroupName, "rg"},
-	}
-	resp, err := server.LoadCollection(ctx, req)
-	suite.NoError(err)
-	suite.Equal(commonpb.ErrorCode_IllegalArgument, resp.ErrorCode)
-
-	// Test load with partitions loaded
-	for _, collection := range suite.collections {
-		if suite.loadTypes[collection] != querypb.LoadType_LoadPartition {
-			continue
-		}
-
-		req := &querypb.LoadCollectionRequest{
-			CollectionID: collection,
-		}
-		resp, err := server.LoadCollection(ctx, req)
-		suite.NoError(err)
-		suite.Equal(commonpb.ErrorCode_IllegalArgument, resp.ErrorCode)
-	}
-
-	// Test load with wrong rg num
-	for _, collection := range suite.collections {
-		req := &querypb.LoadCollectionRequest{
-			CollectionID:   collection,
-			ReplicaNumber:  suite.replicaNumber[collection] + 1,
-			ResourceGroups: []string{"rg1", "rg2"},
-		}
-		resp, err := server.LoadCollection(ctx, req)
-		suite.NoError(err)
-		suite.Equal(commonpb.ErrorCode_IllegalArgument, resp.ErrorCode)
-	}
-}
-
 func (suite *ServiceSuite) TestLoadPartition() {
 	ctx := context.Background()
 	server := suite.server

tests/integration/replicas/load/load_test.go

@@ -854,6 +854,123 @@ func (s *LoadTestSuite) TestDynamicUpdateLoadConfigs_WithRGLackOfNode() {
 	s.releaseCollection(dbName, collectionName)
 }
 
+func (s *LoadTestSuite) TestDynamicUpdateLoadConfigs_OnLoadingCollection() {
+	ctx := context.Background()
+	s.CreateCollectionWithConfiguration(ctx, &integration.CreateCollectionConfig{
+		DBName:           dbName,
+		Dim:              dim,
+		CollectionName:   collectionName,
+		ChannelNum:       1,
+		SegmentNum:       1,
+		RowNumPerSegment: 2000,
+	})
+
+	// prepare resource groups
+	rgNum := 10
+	rgs := make([]string, 0)
+	for i := 0; i < rgNum; i++ {
+		rgs = append(rgs, fmt.Sprintf("rg_%d", i))
+		s.Cluster.QueryCoord.CreateResourceGroup(ctx, &milvuspb.CreateResourceGroupRequest{
+			ResourceGroup: rgs[i],
+			Config: &rgpb.ResourceGroupConfig{
+				Requests: &rgpb.ResourceGroupLimit{
+					NodeNum: 1,
+				},
+				Limits: &rgpb.ResourceGroupLimit{
+					NodeNum: 1,
+				},
+
+				TransferFrom: []*rgpb.ResourceGroupTransfer{
+					{
+						ResourceGroup: meta.DefaultResourceGroupName,
+					},
+				},
+				TransferTo: []*rgpb.ResourceGroupTransfer{
+					{
+						ResourceGroup: meta.DefaultResourceGroupName,
+					},
+				},
+			},
+		})
+	}
+
+	resp, err := s.Cluster.QueryCoord.ListResourceGroups(ctx, &milvuspb.ListResourceGroupsRequest{})
+	s.NoError(err)
+	s.True(merr.Ok(resp.GetStatus()))
+	s.Len(resp.GetResourceGroups(), rgNum+1)
+
+	for i := 1; i < rgNum; i++ {
+		s.Cluster.AddQueryNode()
+	}
+
+	nodesInRG := make(map[string][]int64)
+	s.Eventually(func() bool {
+		matchCounter := 0
+		for _, rg := range rgs {
+			resp1, err := s.Cluster.QueryCoord.DescribeResourceGroup(ctx, &querypb.DescribeResourceGroupRequest{
+				ResourceGroup: rg,
+			})
+			s.NoError(err)
+			s.True(merr.Ok(resp.GetStatus()))
+			if len(resp1.ResourceGroup.Nodes) == 1 {
+				matchCounter += 1
+				nodesInRG[rg] = []int64{resp1.ResourceGroup.Nodes[0].NodeId}
+			}
+		}
+		return matchCounter == rgNum
+	}, 30*time.Second, time.Second)
+
+	// trigger collection loading, and modify collection's load config during loading
+	loadStatus, err := s.Cluster.Proxy.LoadCollection(ctx, &milvuspb.LoadCollectionRequest{
+		DbName:         dbName,
+		CollectionName: collectionName,
+		ReplicaNumber:  1,
+		ResourceGroups: rgs[:1],
+	})
+	s.NoError(err)
+	s.True(merr.Ok(loadStatus))
+	loadStatus, err = s.Cluster.Proxy.LoadCollection(ctx, &milvuspb.LoadCollectionRequest{
+		DbName:         dbName,
+		CollectionName: collectionName,
+		ReplicaNumber:  3,
+		ResourceGroups: rgs[1:4],
+	})
+	s.NoError(err)
+	s.True(merr.Ok(loadStatus))
+	loadStatus, err = s.Cluster.Proxy.LoadCollection(ctx, &milvuspb.LoadCollectionRequest{
+		DbName:         dbName,
+		CollectionName: collectionName,
+		ReplicaNumber:  5,
+		ResourceGroups: rgs[4:9],
+	})
+	s.NoError(err)
+	s.True(merr.Ok(loadStatus))
+
+	s.Eventually(func() bool {
+		resp3, err := s.Cluster.Proxy.GetReplicas(ctx, &milvuspb.GetReplicasRequest{
+			DbName:         dbName,
+			CollectionName: collectionName,
+		})
+		s.NoError(err)
+		s.True(merr.Ok(resp3.Status))
+		return len(resp3.GetReplicas()) == 5
+	}, 30*time.Second, 1*time.Second)
+
+	s.Eventually(func() bool {
+		segmentNum, channelNum := 0, 0
+		for _, qn := range s.Cluster.GetAllQueryNodes() {
+			resp, err := qn.GetDataDistribution(ctx, &querypb.GetDataDistributionRequest{})
+			s.NoError(err)
+			s.True(merr.Ok(resp.Status))
+			segmentNum += len(resp.Segments)
+			channelNum += len(resp.Channels)
+		}
+		return segmentNum == 5 && channelNum == 5
+	}, 30*time.Second, 1*time.Second)
+
+	s.releaseCollection(dbName, collectionName)
+}
+
 func TestReplicas(t *testing.T) {
 	suite.Run(t, new(LoadTestSuite))
 }