diff --git a/internal/proxy/impl.go b/internal/proxy/impl.go
index a21a86309a..48388c4cd5 100644
--- a/internal/proxy/impl.go
+++ b/internal/proxy/impl.go
@@ -340,6 +340,7 @@ func (node *Proxy) LoadCollection(ctx context.Context, request *milvuspb.LoadCol
 	return lct.result, nil
 }
 
+// ReleaseCollection remove the loaded collection from query nodes.
 func (node *Proxy) ReleaseCollection(ctx context.Context, request *milvuspb.ReleaseCollectionRequest) (*commonpb.Status, error) {
 	if !node.checkHealthy() {
 		return unhealthyStatus(), nil