From 6dc95b8e0df342db734b596a27fbafc0f59098ff Mon Sep 17 00:00:00 2001
From: Weilong Wu <veyron_wu@163.com>
Date: Wed, 13 Apr 2022 10:44:16 +0800
Subject: [PATCH] [Eager] Fix multiprocessing eager mode global issue (#41645)
 (#41690)

---
 .../fluid/tests/unittests/test_paddle_multiprocessing.py     | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/python/paddle/fluid/tests/unittests/test_paddle_multiprocessing.py b/python/paddle/fluid/tests/unittests/test_paddle_multiprocessing.py
index 7825b13001f..3fc06e3c8df 100644
--- a/python/paddle/fluid/tests/unittests/test_paddle_multiprocessing.py
+++ b/python/paddle/fluid/tests/unittests/test_paddle_multiprocessing.py
@@ -19,13 +19,16 @@ import unittest
 import time
 import paddle
 import paddle.incubate.multiprocessing as mp
-from paddle.fluid.framework import _test_eager_guard, _in_legacy_dygraph, in_dygraph_mode
+from paddle.fluid.framework import _test_eager_guard, _in_legacy_dygraph, in_dygraph_mode, _enable_legacy_dygraph
 
 REPEAT = 20
 HAS_SHM_FILES = os.path.isdir('/dev/shm')
 
 
 def fill_tensor(queue, event):
+    # make sure run in legacy dygraph
+    if in_dygraph_mode():
+        _enable_legacy_dygraph()
     data = queue.get()
     with paddle.no_grad():
         data[0][:] = 5
-- 
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