Created by: xiegegege

在paddle develop分支下，设置迭代次数为4000，在运行结束后有报错：

* Aborted at 1557413520 (unix time) try "date -d @1557413520" if you are using GNU date *

* Aborted at 1557413520 (unix time) try "date -d @1557413520" if you are using GNU date *

* Aborted at 1557413520 (unix time) try "date -d @1557413520" if you are using GNU date *

* Aborted at 1557413520 (unix time) try "date -d @1557413520" if you are using GNU date *

* Aborted at 1557413520 (unix time) try "date -d @1557413520" if you are using GNU date *

PC: @ 0x0 (unknown) PC: @ 0x0 (unknown) PC: @ 0x0 (unknown)

* SIGTERM (@0x2fd) received by PID 978 (TID 0x7f331d2fc700) from PID 765; stack trace: *

PC: @ 0x0 (unknown)

* SIGTERM (@0x2fd) received by PID 987 (TID 0x7f331d2fc700) from PID 765; stack trace: *

PC: @ 0x0 (unknown)

* SIGTERM (@0x2fd) received by PID 975 (TID 0x7f331d2fc700) from PID 765; stack trace: *

* SIGTERM (@0x2fd) received by PID 966 (TID 0x7f331d2fc700) from PID 765; stack trace: *

* SIGTERM (@0x2fd) received by PID 972 (TID 0x7f331d2fc700) from PID 765; stack trace: *

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0x7f3c802b2660 (unknown) @ 0x7f3c802b32e2 (unknown) @ 0x7f3c802b3584 (unknown) @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b3584 (unknown) @ 0x7f3c802b6f4e _PyEval_EvalFrameDefault @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b3584 (unknown) @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b2fce (unknown) @ 0x7f3c802b3584 (unknown) @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b3584 (unknown) @ 0x7f3c802b35f3 PyEval_EvalCodeEx @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c802b3584 (unknown) @ 0x7f3c801f53f3 (unknown) @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b3584 (unknown) @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c801c334a PyObject_Call @ 0x7f3c802bbc66 _PyFunction_FastCallDict @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c802b3584 (unknown) @ 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0x7f3c801c334a PyObject_Call @ 0x7f3c801c359e _PyObject_FastCallDict @ 0x7f3c80233d33 (unknown) @ 0x7f3c8023b519 (unknown) @ 0x7f3c802b3138 (unknown) @ 0x7f3c80238c01 (unknown) @ 0x7f3c801c368e _PyObject_Call_Prepend @ 0x7f3c801c34ab _PyObject_FastCallDict @ 0x7f3c80233d33 (unknown) @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c801c34ab _PyObject_FastCallDict @ 0x7f3c801c334a PyObject_Call @ 0x7f3c802b3138 (unknown) @ 0x7f3c801c34ab _PyObject_FastCallDict @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b3138 (unknown) @ 0x7f3c8023b519 (unknown) @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c802b3138 (unknown) @ 0x7f3c802b3584 (unknown) @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c80233d33 (unknown) @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b6acc _PyEval_EvalFrameDefault @ 0x7f3c802b2fce (unknown) @ 0x7f3c801c34ab _PyObject_FastCallDict @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b3584 (unknown) @ 0x7f3c802b2660 (unknown) @ 0x7f3c802b3138 (unknown) @ 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