Created by: seiriosPlus

Exception is:

Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 801, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/local/lib/python2.7/dist-packages/paddle/v2/reader/decorator.py", line 274, in handle_worker
    r = mapper(sample)
  File "/usr/local/lib/python2.7/dist-packages/paddle/v2/dataset/flowers.py", line 63, in default_mapper
    img = load_image_bytes(img)
  File "/usr/local/lib/python2.7/dist-packages/paddle/v2/image.py", line 131, in load_image_bytes
    img = cv2.imdecode(file_bytes, flag)
AttributeError: 'NoneType' object has no attribute 'imdecode'

env: docker paddlepaddle: latest-gpu