From a6a6d735ad4bdcf3b7db02ce3afb62da760c9581 Mon Sep 17 00:00:00 2001
From: Guo Sheng <whucsgs@163.com>
Date: Thu, 21 May 2020 15:52:38 +0800
Subject: [PATCH] Fix _forget_bias.stop_gradient workround in
 hapi.text.BasicLSTMCell. (#24655)

test=develop
---
 python/paddle/incubate/hapi/text/text.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python/paddle/incubate/hapi/text/text.py b/python/paddle/incubate/hapi/text/text.py
index c5cd4ae563..1424ce0381 100644
--- a/python/paddle/incubate/hapi/text/text.py
+++ b/python/paddle/incubate/hapi/text/text.py
@@ -254,7 +254,8 @@ class BasicLSTMCell(RNNCell):
         # TODO(guosheng): find better way to resolve constants in __init__
         self._forget_bias = layers.create_global_var(
             shape=[1], dtype=dtype, value=forget_bias, persistable=True)
-        self._forget_bias.stop_gradient = True
+        # TODO(guosheng): refine this if recurrent_op removes gradient require
+        self._forget_bias.stop_gradient = False
         self._dtype = dtype
         self._input_size = input_size
 
-- 
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