#2373

fix bug

modules/storage/obs.go

@@ -575,6 +575,8 @@ func GetObsLogFileName(prefix string) (string, error) {
 		log.Error("PutObject failed:", err.Error())
 		return "", err
 	}
-
+	if output == nil || len(output.Contents) == 0 {
+		return "", errors.New("obs log files not exist")
+	}
 	return output.Contents[0].Key, nil
 }