The following error showed up in the logs in production. ORES responded with a gross 500 error. We should be able to catch this error and report it to the user with some JSON.
Traceback (most recent call last): File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/packages/urllib3/connectionpool.py", line 378, in _make_request httplib_response = conn.getresponse() File "/usr/lib/python3.4/http/client.py", line 1172, in getresponse response.begin() File "/usr/lib/python3.4/http/client.py", line 351, in begin version, status, reason = self._read_status() File "/usr/lib/python3.4/http/client.py", line 313, in _read_status line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1") File "/usr/lib/python3.4/socket.py", line 371, in readinto return self._sock.recv_into(b) File "/usr/lib/python3.4/ssl.py", line 745, in recv_into return self.read(nbytes, buffer) File "/usr/lib/python3.4/ssl.py", line 617, in read v = self._sslobj.read(len, buffer) socket.timeout: The read operation timed out During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/adapters.py", line 376, in send timeout=timeout File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/packages/urllib3/connectionpool.py", line 609, in urlopen _stacktrace=sys.exc_info()[2]) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/packages/urllib3/util/retry.py", line 247, in increment raise six.reraise(type(error), error, _stacktrace) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/packages/urllib3/packages/six.py", line 310, in reraise raise value File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/packages/urllib3/connectionpool.py", line 559, in urlopen body=body, headers=headers) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/packages/urllib3/connectionpool.py", line 380, in _make_request self._raise_timeout(err=e, url=url, timeout_value=read_timeout) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/packages/urllib3/connectionpool.py", line 308, in _raise_timeout raise ReadTimeoutError(self, url, "Read timed out. (read timeout=%s)" % timeout_value) requests.packages.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='pl.wikipedia.org', port=443): Read timed out. (read timeout=5.0) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/srv/deployment/ores/venv/lib/python3.4/site-packages/mwapi/session.py", line 76, in _request stream=True) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/sessions.py", line 468, in request resp = self.send(prep, **send_kwargs) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/sessions.py", line 576, in send r = adapter.send(request, **kwargs) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/requests/adapters.py", line 449, in send raise ReadTimeout(e, request=request) requests.exceptions.ReadTimeout: HTTPSConnectionPool(host='pl.wikipedia.org', port=443): Read timed out. (read timeout=5.0) The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/srv/deployment/ores/venv/lib/python3.4/site-packages/flask/app.py", line 1817, in wsgi_app response = self.full_dispatch_request() File "/srv/deployment/ores/venv/lib/python3.4/site-packages/flask/app.py", line 1477, in full_dispatch_request rv = self.handle_user_exception(e) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/flask/app.py", line 1381, in handle_user_exception reraise(exc_type, exc_value, tb) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/flask/_compat.py", line 33, in reraise raise value File "/srv/deployment/ores/venv/lib/python3.4/site-packages/flask/app.py", line 1475, in full_dispatch_request rv = self.dispatch_request() File "/srv/deployment/ores/venv/lib/python3.4/site-packages/flask/app.py", line 1461, in dispatch_request return self.view_functions[rule.endpoint](**req.view_args) File "./ores/wsgi/routes/v1/scores.py", line 105, in score_revisions precache=precache) File "./ores/score_processors/score_processor.py", line 32, in score include_features=include_features) File "./ores/score_processors/celery.py", line 177, in _score include_features=include_features) File "./ores/score_processors/celery.py", line 95, in _score_in_celery caches=caches) File "./ores/score_processors/score_processor.py", line 60, in _get_root_ds roots = scoring_context.extract_roots(model, rev_ids, caches=caches) File "./ores/scoring_contexts/scoring_context.py", line 100, in extract_roots for rev_id, (error, root_vals) in zip(rev_ids, error_root_vals): File "/srv/deployment/ores/venv/lib/python3.4/site-packages/revscoring/extractors/api/extractor.py", line 123, in _extract_many rev_docs = self.get_rev_doc_map(revids_to_lookup, rvprop=rvprop) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/revscoring/extractors/api/extractor.py", line 230, in get_rev_doc_map return {rd['revid']: rd for rd in rev_docs} File "/srv/deployment/ores/venv/lib/python3.4/site-packages/revscoring/extractors/api/extractor.py", line 230, in <dictcomp> return {rd['revid']: rd for rd in rev_docs} File "/srv/deployment/ores/venv/lib/python3.4/site-packages/revscoring/extractors/api/extractor.py", line 240, in query_revisions_by_revids revids=batch_ids, **params) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/mwapi/session.py", line 157, in get return self._request('GET', self._normalize_params(params)) File "/srv/deployment/ores/venv/lib/python3.4/site-packages/mwapi/session.py", line 78, in _request raise TimeoutError(str(e)) from e mwapi.errors.TimeoutError: HTTPSConnectionPool(host='pl.wikipedia.org', port=443): Read timed out. (read timeout=5.0)