urllib.urlretrieve() fails on second ftp transfer

GitHub fields:

assignee = 'https://github.com/orsenthil'
closed_at = None
created_at = <Date 2016-09-06.15:09:56.495>
labels = ['type-bug', 'library']
title = 'urllib.urlretrieve() fails on second ftp transfer'
updated_at = <Date 2020-01-04.02:20:51.074>
user = 'https://bugs.python.org/SohaibAhmad'

bugs.python.org fields:

activity = <Date 2020-01-04.02:20:51.074>
actor = 'orsenthil'
assignee = 'orsenthil'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2016-09-06.15:09:56.495>
creator = 'Sohaib Ahmad'
dependencies = []
files = ['44396', '44634', '44712', '46381']
hgrepos = []
issue_num = 27973
keywords = ['patch']
message_count = 28.0
messages = ['274559', '274575', '274871', '276280', '276518', '276545', '276587', '276700', '276714', '276723', '276795', '280078', '280089', '280537', '283525', '284977', '284986', '286016', '359099', '359125', '359128', '359135', '359176', '359227', '359228', '359231', '359258', '359271']
nosy_count = 7.0
nosy_names = ['db3l', 'orsenthil', 'scoder', 'r.david.murray', 'Sohaib Ahmad', 'gson', 'pablogsal']
pr_nums = ['1040', '17774', '17819']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue27973'
versions = ['Python 2.7']