diff --git a/internal/querycoord/index_checker.go b/internal/querycoord/index_checker.go
index 560ba75017..532e05f5bf 100644
--- a/internal/querycoord/index_checker.go
+++ b/internal/querycoord/index_checker.go
@@ -110,6 +110,7 @@ func (ic *IndexChecker) close() {
 	ic.wg.Wait()
 }
 
+// reloadFromKV  reload collection/partition, remove from etcd if failed.
 func (ic *IndexChecker) reloadFromKV() error {
 	_, handoffReqValues, version, err := ic.client.LoadWithRevision(handoffSegmentPrefix)
 	if err != nil {