From 4c3c80acb77e09e35fc5c4a360ce7a54163a15fe Mon Sep 17 00:00:00 2001
From: "vn.py" <xiaoyou.chen@foxmail.com>
Date: Fri, 19 Apr 2019 22:39:37 +0800
Subject: [PATCH] [Mod]clear thread handler when downloading data failed

---
 vnpy/app/cta_backtester/engine.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/vnpy/app/cta_backtester/engine.py b/vnpy/app/cta_backtester/engine.py
index b7267fe2..9da8e6f7 100644
--- a/vnpy/app/cta_backtester/engine.py
+++ b/vnpy/app/cta_backtester/engine.py
@@ -329,14 +329,14 @@ class BacktesterEngine(BaseEngine):
             symbol, exchange, Interval(interval), start, end
         )
 
-        if not data:
+        if data:
+            database_manager.save_bar_data(data)
+            self.write_log(f"{vt_symbol}-{interval}历史数据下载完成")
+        else:
             self.write_log(f"数据下载失败，无法获取{vt_symbol}的历史数据")
 
-        database_manager.save_bar_data(data)
-
         # Clear thread object handler.
         self.thread = None
-        self.write_log(f"{vt_symbol}-{interval}历史数据下载完成")
 
     def start_downloading(
         self,