From 3503c47f9a733390f17aa4d027275291d714b02a Mon Sep 17 00:00:00 2001
From: qiaolongfei <qiaolongfei@baidu.com>
Date: Mon, 23 Apr 2018 22:59:49 +0800
Subject: [PATCH] listen and serv default sync mode

---
 paddle/fluid/operators/listen_and_serv_op.cc | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/paddle/fluid/operators/listen_and_serv_op.cc b/paddle/fluid/operators/listen_and_serv_op.cc
index bf351a2f5..3ee642ded 100644
--- a/paddle/fluid/operators/listen_and_serv_op.cc
+++ b/paddle/fluid/operators/listen_and_serv_op.cc
@@ -332,8 +332,7 @@ from send_op and send back variables to recv_op.
         "['param1@GRAD.block0:1', 'param2@GRAD.blockn:2'] "
         "a map from grad name to it's optimize block id")
         .SetDefault({});
-    AddAttr<bool>("sync_mode", "if works at sync_mode or not")
-        .SetDefault(false);
+    AddAttr<bool>("sync_mode", "if works at sync_mode or not").SetDefault(true);
     AddAttr<framework::BlockDesc *>(kOptimizeBlock,
                                     "BlockID to run on server side.");
     AddAttr<framework::BlockDesc *>(kPrefetchBlock,
-- 
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