diff --git a/topology/server/handler/handler.go b/topology/server/handler/handler.go
index dd987a7bc4b16a663711564dbb7300e4812d0423..9eddad8c16123a5a8fab1ae3e399c24d2dd0815b 100644
--- a/topology/server/handler/handler.go
+++ b/topology/server/handler/handler.go
@@ -34,9 +34,10 @@ func SingleHostHandle(ctx *gin.Context) {
 
 		ctx.JSON(http.StatusBadRequest, gin.H{
 			"code":  -1,
-			"error": err,
+			"error": err.Error(),
 			"data":  nil,
 		})
+		return
 	}
 
 	ctx.JSON(http.StatusOK, gin.H{
@@ -73,7 +74,7 @@ func MultiHostHandle(ctx *gin.Context) {
 
 		ctx.JSON(http.StatusBadRequest, gin.H{
 			"code":  -1,
-			"error": err,
+			"error": err.Error(),
 			"data":  nil,
 		})
 		return