matching in APS workflows fails too often

[MJedr]

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/workflow/engine.py", line 529, in _process
    self.run_callbacks(callbacks, objects, obj)
  File "/usr/lib/python2.7/site-packages/workflow/engine.py", line 454, in run_callbacks
    indent + 1)
  File "/usr/lib/python2.7/site-packages/workflow/engine.py", line 454, in run_callbacks
    indent + 1)
  File "/usr/lib/python2.7/site-packages/workflow/engine.py", line 481, in run_callbacks
    self.execute_callback(callback_func, obj)
  File "/usr/lib/python2.7/site-packages/workflow/engine.py", line 564, in execute_callback
    callback(obj, self)
  File "/usr/lib/python2.7/site-packages/workflow/patterns/controlflow.py", line 189, in _x
    return cond(obj, eng) and eng.jump_call(1) \
  File "/code/inspirehep/modules/workflows/utils/__init__.py", line 155, in _decorator
    res = func(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/backoff/_sync.py", line 94, in retry
    ret = target(*args, **kwargs)
  File "/code/inspirehep/modules/workflows/tasks/matching.py", line 123, in fuzzy_match
    "data": obj.data,
  File "/usr/lib/python2.7/site-packages/requests/api.py", line 75, in get
    return request('get', url, params=params, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/api.py", line 60, in request
    return session.request(method=method, url=url, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 533, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 646, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python2.7/site-packages/requests/adapters.py", line 498, in send
    raise ConnectionError(err, request=request)
ConnectionError: ('Connection aborted.', BadStatusLine("''",))