the docker bash could not init the example data urllib.error.URLError: <urlopen error [Errno 111] Connection refused>

[chaoyue729]

docker exec -it superset superset load_examples
/usr/local/lib/python3.6/site-packages/psycopg2/init.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: http://initd.org/psycopg/docs/install.html#binary-install-from-pypi.
""")
2020-04-10 03:33:35,856:INFO:root:logging was configured successfully
2020-04-10 03:33:36,012:INFO:root:Configured event logger of type <class 'superset.utils.log.DBEventLogger'>
2020-04-10 03:33:36,349:DEBUG:asyncio:Using selector: EpollSelector
Loading examples metadata and related data into examples
Creating default CSS templates
Loading energy related dataset
2020-04-10 03:33:37,375:INFO:root:Database.get_sqla_engine(). Masked URL: sqlite:////var/lib/superset/superset.db
Traceback (most recent call last):
File "/usr/local/lib/python3.6/urllib/request.py", line 1318, in do_open
encode_chunked=req.has_header('Transfer-encoding'))
File "/usr/local/lib/python3.6/http/client.py", line 1262, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/usr/local/lib/python3.6/http/client.py", line 1308, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/usr/local/lib/python3.6/http/client.py", line 1257, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/usr/local/lib/python3.6/http/client.py", line 1036, in _send_output
self.send(msg)
File "/usr/local/lib/python3.6/http/client.py", line 974, in send
self.connect()
File "/usr/local/lib/python3.6/http/client.py", line 1415, in connect
super().connect()
File "/usr/local/lib/python3.6/http/client.py", line 946, in connect
(self.host,self.port), self.timeout, self.source_address)
File "/usr/local/lib/python3.6/socket.py", line 724, in create_connection
raise err
File "/usr/local/lib/python3.6/socket.py", line 713, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/bin/superset", line 31, in
cli()
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 722, in call
return self.main(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 586, in main
return super(FlaskGroup, self).main(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/click/decorators.py", line 17, in new_func
return f(get_current_context(), *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/flask/cli.py", line 426, in decorator
return __ctx.invoke(f, *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/superset/cli.py", line 142, in load_examples
load_examples_run(load_test_data, only_metadata, force)
File "/usr/local/lib/python3.6/site-packages/superset/cli.py", line 83, in load_examples_run
examples.load_energy(only_metadata, force)
File "/usr/local/lib/python3.6/site-packages/superset/examples/energy.py", line 39, in load_energy
data = get_example_data("energy.json.gz")
File "/usr/local/lib/python3.6/site-packages/superset/examples/helpers.py", line 73, in get_example_data
content = request.urlopen(f"{BASE_URL}{filepath}?raw=true").read()
File "/usr/local/lib/python3.6/urllib/request.py", line 223, in urlopen
return opener.open(url, data, timeout)
File "/usr/local/lib/python3.6/urllib/request.py", line 532, in open
response = meth(req, response)
File "/usr/local/lib/python3.6/urllib/request.py", line 642, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/local/lib/python3.6/urllib/request.py", line 564, in error
result = self._call_chain(*args)
File "/usr/local/lib/python3.6/urllib/request.py", line 504, in _call_chain
result = func(*args)
File "/usr/local/lib/python3.6/urllib/request.py", line 756, in http_error_302
return self.parent.open(new, timeout=req.timeout)
File "/usr/local/lib/python3.6/urllib/request.py", line 532, in open
response = meth(req, response)
File "/usr/local/lib/python3.6/urllib/request.py", line 642, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/local/lib/python3.6/urllib/request.py", line 564, in error
result = self._call_chain(*args)
File "/usr/local/lib/python3.6/urllib/request.py", line 504, in _call_chain
result = func(*args)
File "/usr/local/lib/python3.6/urllib/request.py", line 756, in http_error_302
return self.parent.open(new, timeout=req.timeout)
File "/usr/local/lib/python3.6/urllib/request.py", line 526, in open
response = self._open(req, data)
File "/usr/local/lib/python3.6/urllib/request.py", line 544, in _open
'_open', req)
File "/usr/local/lib/python3.6/urllib/request.py", line 504, in _call_chain
result = func(*args)
File "/usr/local/lib/python3.6/urllib/request.py", line 1361, in https_open
context=self._context, check_hostname=self._check_hostname)
File "/usr/local/lib/python3.6/urllib/request.py", line 1320, in do_open
raise URLError(err)
urllib.error.URLError: <urlopen error [Errno 111] Connection refused>