diff --git a/routers/repo/attachment.go b/routers/repo/attachment.go
index 2def9ffc4..f474f88d6 100755
--- a/routers/repo/attachment.go
+++ b/routers/repo/attachment.go
@@ -659,6 +659,16 @@ func QueryPrivateDataset(ctx *context.Context){
 
 func queryDatasets(ctx *context.Context, attachs []*models.AttachmentUsername) {
 	var datasets []CloudBrainDataset
+	if len(attachs) == 0 {
+		log.Info("dataset is null")
+		ctx.JSON(200, map[string]string{
+			"result_code": "0",
+			"error_msg": "",
+			"data":	"",
+		})
+		return
+	}
+
 	for _, attch := range attachs {
 		has,err := storage.Attachments.HasObject(models.AttachmentRelativePath(attch.UUID))
 		if err != nil || !has {
diff --git a/routers/repo/cloudbrain.go b/routers/repo/cloudbrain.go
index 81554b9fc..6742864c6 100755
--- a/routers/repo/cloudbrain.go
+++ b/routers/repo/cloudbrain.go
@@ -264,12 +264,11 @@ func downloadCode(repo *models.Repository, codePath string) error {
 	command := "git clone " + repo.CloneLink().HTTPS + " " + codePath
 	cmd := exec.Command("/bin/bash", "-c", command)
 	output, err := cmd.Output()
+	log.Info(string(output))
 	if err != nil {
-		log.Error("exec.Command failed:%v", err)
+		log.Error("exec.Command(%s) failed:%v", command, err)
 		return err
 	}
 
-	log.Info(string(output))
-
 	return nil
 }