diff --git a/br/pkg/lightning/backend/external/util.go b/br/pkg/lightning/backend/external/util.go
index 34480e026f1e1..d433e4816998c 100644
--- a/br/pkg/lightning/backend/external/util.go
+++ b/br/pkg/lightning/backend/external/util.go
@@ -277,15 +277,7 @@ func (m *SortedKVMeta) Merge(other *SortedKVMeta) {
 
 // MergeSummary merges the WriterSummary into this SortedKVMeta.
 func (m *SortedKVMeta) MergeSummary(summary *WriterSummary) {
-	m.MinKey = NotNilMin(m.MinKey, summary.Min)
-	m.MaxKey = NotNilMax(m.MaxKey, summary.Max)
-	m.TotalKVSize += summary.TotalSize
-	for _, f := range summary.MultipleFilesStats {
-		for _, filename := range f.Filenames {
-			m.DataFiles = append(m.DataFiles, filename[0])
-			m.StatFiles = append(m.StatFiles, filename[1])
-		}
-	}
+	m.Merge(NewSortedKVMeta(summary))
 }
 
 // NotNilMin returns the smallest of a and b, ignoring nil values.
diff --git a/br/pkg/lightning/backend/local/local.go b/br/pkg/lightning/backend/local/local.go
index ed26117bc669b..cf39bbfb73b52 100644
--- a/br/pkg/lightning/backend/local/local.go
+++ b/br/pkg/lightning/backend/local/local.go
@@ -1694,8 +1694,6 @@ func (local *Backend) GetExternalEngineKVStatistics(engineUUID uuid.UUID) (
 	totalKVSize int64, totalKVCount int64) {
 	v, ok := local.externalEngine[engineUUID]
 	if !ok {
-		// we get it after import, but before clean up, so this should not happen
-		// todo: return error
 		return 0, 0
 	}
 	return v.KVStatistics()
diff --git a/executor/importer/table_import.go b/executor/importer/table_import.go
index 6300d70eaba2e..cf441346c67db 100644
--- a/executor/importer/table_import.go
+++ b/executor/importer/table_import.go
@@ -150,12 +150,11 @@ func GetCachedKVStoreFrom(pdAddr string, tls *common.TLS) (tidbkv.Storage, error
 // GetRegionSplitSizeKeys gets the region split size and keys from PD.
 func GetRegionSplitSizeKeys(ctx context.Context) (regionSplitSize int64, regionSplitKeys int64, err error) {
 	tidbCfg := tidb.GetGlobalConfig()
-	hostPort := net.JoinHostPort("127.0.0.1", strconv.Itoa(int(tidbCfg.Status.StatusPort)))
 	tls, err := common.NewTLS(
 		tidbCfg.Security.ClusterSSLCA,
 		tidbCfg.Security.ClusterSSLCert,
 		tidbCfg.Security.ClusterSSLKey,
-		hostPort,
+		"",
 		nil, nil, nil,
 	)
 	if err != nil {