Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/koji/daemon.py", line 1244, in runTask
    response = (handler.run(),)
  File "/usr/lib/python2.7/site-packages/koji/tasks.py", line 307, in run
    return koji.util.call_with_argcheck(self.handler, self.params, self.opts)
  File "/usr/lib/python2.7/site-packages/koji/util.py", line 209, in call_with_argcheck
    return func(*args, **kwargs)
  File "/usr/sbin/kojid", line 1195, in handler
    fn = self.localPath("work/%s" % pkg)
  File "/usr/lib/python2.7/site-packages/koji/tasks.py", line 477, in localPath
    fsrc = six.moves.urllib.request.urlopen(url)
  File "/usr/lib64/python2.7/urllib2.py", line 154, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib64/python2.7/urllib2.py", line 435, in open
    response = meth(req, response)
  File "/usr/lib64/python2.7/urllib2.py", line 548, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib64/python2.7/urllib2.py", line 473, in error
    return self._call_chain(*args)
  File "/usr/lib64/python2.7/urllib2.py", line 407, in _call_chain
    result = func(*args)
  File "/usr/lib64/python2.7/urllib2.py", line 556, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 503: Backend fetch failed