DisconnectionError: The client disconnected while sending the POST/PUT body

Hello all,
 glance version is '2012.1+stable~20120608-5462295-0ubuntu2.2'. When I execute image-create to upload huge size image(4~10G) to glance which backend is swift, console shows 'Error communicating with Connection reset by peer'. and the following info is from glance api.log. Please help to clarify. Thanks.

ERROR [glance.api.v1.images] Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/glance/api/v1/images.py", line 393, in _upload
    image_size)
  File "/usr/lib/python2.7/dist-packages/glance/store/swift.py", line 387, in add
    content_length=image_size)
  File "/usr/lib/python2.7/dist-packages/swift/common/client.py", line 937, in put_object
    content_type=content_type, headers=headers)
  File "/usr/lib/python2.7/dist-packages/swift/common/client.py", line 841, in _retry
    rv = func(self.url, self.token, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/swift/common/client.py", line 705, in put_object
    chunk = contents.read(size)
  File "/usr/lib/python2.7/dist-packages/webob/request.py", line 1284, in read
    self._check_disconnect()
  File "/usr/lib/python2.7/dist-packages/webob/request.py", line 1311, in _check_disconnect
    + "(%d more bytes were expected)" % self.remaining
DisconnectionError: The client disconnected while sending the POST/PUT body (3682598912 more bytes were expected)