Failed to upload larger image , error invalid literal for int() with base 16: ''

Hi folks ,
We're using Glance Essex3 for managing images. Backend by Swift 1.4.6.

Swift-proxy , Glance-API and Glance-Registry were installed in same host.

Glance Essex3 source from GitHub tag.
Swift 1.4.6 from PPA

We can upload 700MB images properly .
But failed to upload 1.5G image . There's the Error log

2012-03-14 01:11:28 11911 ERROR [glance.api.v1.images] Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/glance-2012.1-py2.7.egg/glance/api/v1/images.py", line 349, in _upload
    image_size)
  File "/usr/local/lib/python2.7/dist-packages/glance-2012.1-py2.7.egg/glance/store/swift.py", line 375, in add
    content_length=image_size)
  File "/usr/lib/python2.7/dist-packages/swift/common/client.py", line 843, in put_object
    content_type=content_type, headers=headers)
  File "/usr/lib/python2.7/dist-packages/swift/common/client.py", line 747, in _retry
    rv = func(self.url, self.token, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/swift/common/client.py", line 618, in put_object
    chunk = contents.read(size)
  File "/usr/lib/python2.7/dist-packages/eventlet/wsgi.py", line 147, in read
    return self._chunked_read(self.rfile, length)
  File "/usr/lib/python2.7/dist-packages/eventlet/wsgi.py", line 137, in _chunked_read
    self.chunk_length = int(rfile.readline().split(";", 1)[0])
ValueError: invalid literal for int() with base 16: ''

did I lose anything?

thx
Hugo Kuo