urllib failure while importing tickets

[johan]

Importing the trac environment http://www.lysator.liu.se/~jhs/greasemonkey.trac.zip to an empty github issue tracker, aborts on this error:

sudo ./trac2issues.py -p greasemonkey -m -x -o -r -c -u http://greasemonkey.devjavu.com -t /var/trac/greasemonkey
Does this look like a valid trac url? [y/N]
http://greasemonkey.devjavu.com/ticket/1234567
y
About to import (260) tickets from Trac to johan/greasemonkey.
Are you sure you wish to continue? [y/N]
y
Creating issue.
Issue #1 created.
Adding label @ to issue # 1
Adding label @@[email protected] to issue # 1
Traceback (most recent call last):
File "./trac2issues.py", line 250, in
ImportTickets()
File "./trac2issues.py", line 67, in init
self._fetchTickets()
File "./trac2issues.py", line 141, in _fetchTickets
self.createIssue(data)
File "./trac2issues.py", line 179, in createIssue
self.createLabel(num, "@@%s" % info['reporter'])
File "./trac2issues.py", line 203, in createLabel
response = urllib2.urlopen(req)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 124, in urlopen
return _opener.open(url, data, timeout)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 389, in open
response = meth(req, response)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 502, in http_response
'http', request, response, code, msg, hdrs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 427, in error
return self._call_chain(_args)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 361, in _call_chain
result = func(_args)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/urllib2.py", line 510, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 404: Not Found

[johan]

Ugh. Pardon the shell session not surviving MarkDown interpretation unscathed.

[dkindlund]

Not sure if this is related, but according to:
http://develop.github.com/p/general.html

If you make more than 60 API calls per minute, the web service will actively block your connections (for a brief period of time). This problem will occur if you have a significantly large number of tickets. Adding sleep(5) calls between web service calls will prevent this from happening.