Created by: zhouksh

inference 过程正常，可以打印loss，但是假如optimizer 进行训练时报错：

Traceback (most recent call last): File "ref/train.py", line 111, in train(args) File "ref/train.py", line 79, in train result = exe.run(fluid.default_main_program(), feed=feed, fetch_list=fetch_list, return_numpy=True) File "/home/work/software/paddle_release_home/python/lib/python2.7/site-packages/paddle/fluid/executor.py", line 470, in run self.executor.run(program.desc, scope, 0, True, True) paddle.fluid.core.EnforceNotMet: DataType of Paddle Op reduce_sum_grad must be the same. Get reduce_sum_1.tmp_0(5) != reduce_sum_1.tmp_0@GRAD(3) at [/paddle/paddle/fluid/framework/operator.cc:860] PaddlePaddle Call Stacks: 0 0x7fe6a5a19246p paddle::platform::EnforceNotMet::EnforceNotMet(std::_exception_ptr::exception_ptr, char const*, int) + 486 1 0x7fe6a711855cp paddle::framework::OperatorWithKernel::IndicateDataType(paddle::framework::ExecutionContext const&) const + 956 2 0x7fe6a71188dfp paddle::framework::OperatorWithKernel::GetExpectedKernelType(paddle::framework::ExecutionContext const&) const + 47 3 0x7fe6a711993dp paddle::framework::OperatorWithKernel::RunImpl(paddle::framework::Scope const&, boost::variant<paddle::platform::CUDAPlace, paddle::platform::CPUPlace, paddle::platform::CUDAPinnedPlace, boost::detail::variant::voi 4 0x7fe6a7115c5fp paddle::framework::OperatorBase::Run(paddle::framework::Scope const&, boost::variant<paddle::platform::CUDAPlace, paddle::platform::CPUPlace, paddle::platform::CUDAPinnedPlace, boost::detail::variant::void, boost: 5 0x7fe6a5ae6debp paddle::framework::Executor::RunPreparedContext(paddle::framework::ExecutorPrepareContext*, paddle::framework::Scope*, bool, bool, bool) + 219 6 0x7fe6a5ae7a40p paddle::framework::Executor::Run(paddle::framework::ProgramDesc const&, paddle::framework::Scope*, int, bool, bool) + 128 7 0x7fe6a59fb23dp 8 0x7fe6a5a2f0d4p pybind11::cpp_function::dispatcher(_object*, _object*, _object*) + 2596 9 0x7fe6eb2e8bb8p PyEval_EvalFrameEx + 25016 10 0x7fe6eb2ec0bdp PyEval_EvalCodeEx + 2061 11 0x7fe6eb2e9345p PyEval_EvalFrameEx + 26949 12 0x7fe6eb2e9460p PyEval_EvalFrameEx + 27232 13 0x7fe6eb2ec0bdp PyEval_EvalCodeEx + 2061 14 0x7fe6eb2ec1f2p PyEval_EvalCode + 50 15 0x7fe6eb314f42p PyRun_FileExFlags + 146 16 0x7fe6eb3162d9p PyRun_SimpleFileExFlags + 217 17 0x7fe6eb32c00dp Py_Main + 3149 18 0x7fe6ea529bd5p __libc_start_main + 245 19 0x4007a1p