Created by: Yancey1989

Block #9150 Error job link:https://paddleci.ngrok.io/viewLog.html?buildId=31167&buildTypeId=Paddle_DistributedUnitTestNightly&tab=buildLog Log message:

[14:47:03]	[Step 1/1] ======================================================================
[14:47:03]	[Step 1/1] ERROR: test_send (test_recv_op.TestRecvOp)
[14:47:03]	[Step 1/1] ----------------------------------------------------------------------
[14:47:03]	[Step 1/1] Traceback (most recent call last):
[14:47:03]	[Step 1/1]   File "test_recv_op.py", line 33, in test_send
[14:47:03]	[Step 1/1]     self.init_client(place)
[14:47:03]	[Step 1/1]   File "test_recv_op.py", line 64, in init_client
[14:47:03]	[Step 1/1]     layers.Send("127.0.0.1:6174", [x], [x])
[14:47:03]	[Step 1/1]   File "/paddle/build/python/build/lib-python/paddle/fluid/layers/io.py", line 203, in Send
[14:47:03]	[Step 1/1]     "epmap": epmap})
[14:47:03]	[Step 1/1]   File "/paddle/build/python/build/lib-python/paddle/fluid/layer_helper.py", line 45, in append_op
[14:47:03]	[Step 1/1]     return self.main_program.current_block().append_op(*args, **kwargs)
[14:47:03]	[Step 1/1]   File "/paddle/build/python/build/lib-python/paddle/fluid/framework.py", line 816, in append_op
[14:47:03]	[Step 1/1]     op = Operator(block=self, desc=op_desc, *args, **kwargs)
[14:47:03]	[Step 1/1]   File "/paddle/build/python/build/lib-python/paddle/fluid/framework.py", line 452, in __init__
[14:47:03]	[Step 1/1]     ", ".join(str(e) for e in given)))
[14:47:03]	[Step 1/1] ValueError: Incorrect setting for output(s) of operator "send". Need: [RPCClient, Out] Given: [Out]
[14:47:03]	[Step 1/1]