diff --git a/internal/proxy/accesslog/info/grpc_info.go b/internal/proxy/accesslog/info/grpc_info.go
index cc9718fac5..570ac03889 100644
--- a/internal/proxy/accesslog/info/grpc_info.go
+++ b/internal/proxy/accesslog/info/grpc_info.go
@@ -22,6 +22,7 @@ import (
 	"path"
 	"time"
 
+	"github.com/golang/protobuf/proto"
 	"go.opentelemetry.io/otel/trace"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
@@ -29,7 +30,6 @@ import (
 	"google.golang.org/grpc/peer"
 	"google.golang.org/grpc/status"
 
-	"github.com/golang/protobuf/proto"
 	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/v2/milvuspb"
 	"github.com/milvus-io/milvus/internal/proxy/connection"
diff --git a/internal/proxy/task_index.go b/internal/proxy/task_index.go
index 1fbe708a4e..e74a14f1d8 100644
--- a/internal/proxy/task_index.go
+++ b/internal/proxy/task_index.go
@@ -160,17 +160,32 @@ func (cit *createIndexTask) parseIndexParams() error {
 
 	if !isVecIndex {
 		specifyIndexType, exist := indexParamsMap[common.IndexTypeKey]
-		if Params.AutoIndexConfig.ScalarAutoIndexEnable.GetAsBool() || specifyIndexType == AutoIndexName || !exist {
-			if typeutil.IsArithmetic(cit.fieldSchema.DataType) {
-				indexParamsMap[common.IndexTypeKey] = Params.AutoIndexConfig.ScalarNumericIndexType.GetValue()
-			} else if typeutil.IsStringType(cit.fieldSchema.DataType) {
-				indexParamsMap[common.IndexTypeKey] = Params.AutoIndexConfig.ScalarVarcharIndexType.GetValue()
-			} else if typeutil.IsBoolType(cit.fieldSchema.DataType) {
-				indexParamsMap[common.IndexTypeKey] = Params.AutoIndexConfig.ScalarBoolIndexType.GetValue()
-			} else {
-				return merr.WrapErrParameterInvalid("supported field",
-					fmt.Sprintf("create auto index on %s field is not supported", cit.fieldSchema.DataType.String()))
+		autoIndexEnable := Params.AutoIndexConfig.ScalarAutoIndexEnable.GetAsBool()
+
+		if autoIndexEnable || !exist || specifyIndexType == AutoIndexName {
+			getPrimitiveIndexType := func(dataType schemapb.DataType) (string, error) {
+				if typeutil.IsArithmetic(dataType) {
+					return Params.AutoIndexConfig.ScalarNumericIndexType.GetValue(), nil
+				} else if typeutil.IsStringType(dataType) {
+					return Params.AutoIndexConfig.ScalarVarcharIndexType.GetValue(), nil
+				} else if typeutil.IsBoolType(dataType) {
+					return Params.AutoIndexConfig.ScalarBoolIndexType.GetValue(), nil
+				}
+				return "", fmt.Errorf("create auto index on type:%s is not supported", dataType.String())
 			}
+
+			indexType, err := func() (string, error) {
+				dataType := cit.fieldSchema.DataType
+				if typeutil.IsArrayType(dataType) {
+					return getPrimitiveIndexType(cit.fieldSchema.ElementType)
+				}
+				return getPrimitiveIndexType(dataType)
+			}()
+			if err != nil {
+				return merr.WrapErrParameterInvalid("supported field", err.Error())
+			}
+
+			indexParamsMap[common.IndexTypeKey] = indexType
 		}
 	} else {
 		specifyIndexType, exist := indexParamsMap[common.IndexTypeKey]
diff --git a/internal/querycoordv2/balance/score_based_balancer_test.go b/internal/querycoordv2/balance/score_based_balancer_test.go
index b125a9ead9..94082e2597 100644
--- a/internal/querycoordv2/balance/score_based_balancer_test.go
+++ b/internal/querycoordv2/balance/score_based_balancer_test.go
@@ -565,7 +565,7 @@ func (suite *ScoreBasedBalancerTestSuite) TestDelegatorPreserveMemory() {
 			suite.Len(segmentPlans, 0)
 
 			paramtable.Get().Save(paramtable.Get().QueryCoordCfg.DelegatorMemoryOverloadFactor.Key, "2")
-			segmentPlans, channelPlans = suite.getCollectionBalancePlans(balancer, c.collectionID)
+			segmentPlans, _ = suite.getCollectionBalancePlans(balancer, c.collectionID)
 			suite.Len(segmentPlans, 1)
 			suite.Equal(segmentPlans[0].To, int64(2))
 		})
diff --git a/pkg/util/paramtable/component_param.go b/pkg/util/paramtable/component_param.go
index bccc1842ff..4bc7e5243f 100644
--- a/pkg/util/paramtable/component_param.go
+++ b/pkg/util/paramtable/component_param.go
@@ -1595,7 +1595,7 @@ type queryCoordConfig struct {
 	RowCountMaxSteps                    ParamItem `refreshable:"true"`
 	RandomMaxSteps                      ParamItem `refreshable:"true"`
 	GrowingRowCountWeight               ParamItem `refreshable:"true"`
-	DelegatorMemoryOverloadFactor       ParamItem `refreshable:"true`
+	DelegatorMemoryOverloadFactor       ParamItem `refreshable:"true"`
 	BalanceCostThreshold                ParamItem `refreshable:"true"`
 
 	SegmentCheckInterval       ParamItem `refreshable:"true"`
@@ -1638,7 +1638,7 @@ type queryCoordConfig struct {
 	CollectionObserverInterval         ParamItem `refreshable:"false"`
 	CheckExecutedFlagInterval          ParamItem `refreshable:"false"`
 	UpdateCollectionLoadStatusInterval ParamItem `refreshable:"false"`
-	CollectionBalanceSegmentBatchSize  ParamItem `refreshable true`
+	CollectionBalanceSegmentBatchSize  ParamItem `refreshable:"true"`
 }
 
 func (p *queryCoordConfig) init(base *BaseTable) {
diff --git a/pkg/util/typeutil/schema.go b/pkg/util/typeutil/schema.go
index 822b19555c..9d35f0fd95 100644
--- a/pkg/util/typeutil/schema.go
+++ b/pkg/util/typeutil/schema.go
@@ -463,6 +463,10 @@ func IsVariableDataType(dataType schemapb.DataType) bool {
 	return IsStringType(dataType) || IsArrayType(dataType) || IsJSONType(dataType)
 }
 
+func IsPrimitiveType(dataType schemapb.DataType) bool {
+	return IsArithmetic(dataType) || IsStringType(dataType) || IsBoolType(dataType)
+}
+
 // PrepareResultFieldData construct this slice fo FieldData for final result reduce
 // this shall preallocate the space for field data internal slice prevent slice growing cost.
 func PrepareResultFieldData(sample []*schemapb.FieldData, topK int64) []*schemapb.FieldData {