diff --git a/internal/datanode/flow_graph_delete_node.go b/internal/datanode/flow_graph_delete_node.go
index 46bf0a218ee2546c793f8ac3990551a83d7bb7dd..db148564abe1258db41fbcf21cbcee6c42394634 100644
--- a/internal/datanode/flow_graph_delete_node.go
+++ b/internal/datanode/flow_graph_delete_node.go
@@ -115,7 +115,7 @@ func (dn *deleteNode) Operate(in []Msg) []Msg {
 
 	// process flush messages
 	if len(fgMsg.segmentsToSync) > 0 {
-		log.Debug("DeleteNode receives flush message",
+		log.Info("DeleteNode receives flush message",
 			zap.Int64s("segIDs", fgMsg.segmentsToSync),
 			zap.String("vChannelName", dn.channelName),
 			zap.Time("posTime", tsoutil.PhysicalTime(fgMsg.endPositions[0].Timestamp)))
diff --git a/internal/proxy/default_limit_reducer.go b/internal/proxy/default_limit_reducer.go
index 9e72b12fe033beaf3a8622f32502da9cd4a7c459..8987164afeeca2cc0639808e0bca5821ac4885d5 100644
--- a/internal/proxy/default_limit_reducer.go
+++ b/internal/proxy/default_limit_reducer.go
@@ -7,10 +7,8 @@ import (
 	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
 	"github.com/milvus-io/milvus-proto/go-api/schemapb"
 	"github.com/milvus-io/milvus/internal/common"
-	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/proto/internalpb"
 	"github.com/milvus-io/milvus/internal/util/typeutil"
-	"go.uber.org/zap"
 )
 
 type defaultLimitReducer struct {
@@ -36,7 +34,6 @@ func (r *defaultLimitReducer) Reduce(results []*internalpb.RetrieveResults) (*mi
 
 func (r *defaultLimitReducer) afterReduce(result *milvuspb.QueryResults) error {
 	collectionName := r.collectionName
-	ctx := r.ctx
 	schema := r.schema
 	outputFieldsID := r.req.GetOutputFieldsId()
 
@@ -47,8 +44,6 @@ func (r *defaultLimitReducer) afterReduce(result *milvuspb.QueryResults) error {
 			ErrorCode: commonpb.ErrorCode_Success,
 		}
 	} else {
-		log.Ctx(ctx).Warn("Query result is nil",
-			zap.Any("requestType", "query"))
 		result.Status = &commonpb.Status{
 			ErrorCode: commonpb.ErrorCode_EmptyCollection,
 			Reason:    "empty collection", // TODO