untitled notebook can't be closed

[kailzhu]

Description

What steps will reproduce the problem?

When I opened a new notebook, it showed "This site can't be reached". So I closed it and this error showed.

Traceback

  File "C:\ProgramData\Miniconda3\lib\site-packages\urllib3\connection.py", line 157, in _new_conn
    (self._dns_host, self.port), self.timeout, **extra_kw
  File "C:\ProgramData\Miniconda3\lib\site-packages\urllib3\util\connection.py", line 84, in create_connection
    raise err
  File "C:\ProgramData\Miniconda3\lib\site-packages\urllib3\util\connection.py", line 74, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [WinError 10061] 由于目标计算机积极拒绝，无法连接。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\ProgramData\Miniconda3\lib\site-packages\urllib3\connectionpool.py", line 672, in urlopen
    chunked=chunked,
  File "C:\ProgramData\Miniconda3\lib\site-packages\urllib3\connectionpool.py", line 387, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "C:\ProgramData\Miniconda3\lib\http\client.py", line 1244, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "C:\ProgramData\Miniconda3\lib\http\client.py", line 1290, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "C:\ProgramData\Miniconda3\lib\http\client.py", line 1239, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "C:\ProgramData\Miniconda3\lib\http\client.py", line 1026, in _send_output
    self.send(msg)
  File "C:\ProgramData\Miniconda3\lib\http\client.py", line 966, in send
    self.connect()
  File "C:\ProgramData\Miniconda3\lib\site-packages\urllib3\connection.py", line 184, in connect
    conn = self._new_conn()
  File "C:\ProgramData\Miniconda3\lib\site-packages\urllib3\connection.py", line 169, in _new_conn
    self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x0000021934112D08>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\ProgramData\Miniconda3\lib\site-packages\requests\adapters.py", line 449, in send
    timeout=timeout
  File "C:\ProgramData\Miniconda3\lib\site-packages\urllib3\connectionpool.py", line 720, in urlopen
    method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
  File "C:\ProgramData\Miniconda3\lib\site-packages\urllib3\util\retry.py", line 436, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='localhost', port=8888): Max retries exceeded with url: /api/sessions?token=13b8c019bde82073da708c0f24e9df5d3da505a62a807d45 (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x0000021934112D08>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\ProgramData\Miniconda3\lib\site-packages\spyder_notebook\notebookplugin.py", line 378, in close_client
    client.shutdown_kernel()
  File "C:\ProgramData\Miniconda3\lib\site-packages\spyder_notebook\widgets\client.py", line 248, in shutdown_kernel
    kernel_id = self.get_kernel_id()
  File "C:\ProgramData\Miniconda3\lib\site-packages\spyder_notebook\widgets\client.py", line 232, in get_kernel_id
    sessions_req = requests.get(sessions_url).content.decode()
  File "C:\ProgramData\Miniconda3\lib\site-packages\requests\api.py", line 75, in get
    return request('get', url, params=params, **kwargs)
  File "C:\ProgramData\Miniconda3\lib\site-packages\requests\api.py", line 60, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\ProgramData\Miniconda3\lib\site-packages\requests\sessions.py", line 533, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\ProgramData\Miniconda3\lib\site-packages\requests\sessions.py", line 646, in send
    r = adapter.send(request, **kwargs)
  File "C:\ProgramData\Miniconda3\lib\site-packages\requests\adapters.py", line 516, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8888): Max retries exceeded with url: /api/sessions?token=13b8c019bde82073da708c0f24e9df5d3da505a62a807d45 (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x0000021934112D08>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。'))

Versions

• Spyder version: 4.0.1
• Python version: 3.7.4
• Qt version: 5.9.6
• PyQt5 version: 5.9.2
• Operating System: Windows 10

Dependencies

atomicwrites >=1.2.0         :  1.3.0 (OK)
chardet >=2.0.0              :  3.0.4 (OK)
cloudpickle >=0.5.0          :  1.3.0 (OK)
diff_match_patch >=20181111  :  20181111 (OK)
intervaltree                 :  None (OK)
IPython >=4.0                :  7.12.0 (OK)
jedi =0.14.1                 :  0.14.1 (OK)
nbconvert >=4.0              :  5.6.1 (OK)
numpydoc >=0.6.0             :  0.9.2 (OK)
pexpect >=4.4.0              :  4.8.0 (OK)
pickleshare >=0.4            :  0.7.5 (OK)
psutil >=0.3                 :  5.6.7 (OK)
pygments >=2.0               :  2.5.2 (OK)
pylint >=0.25                :  2.4.4 (OK)
pyls >=0.31.2;<0.32.0        :  0.31.7 (OK)
zmq >=17                     :  18.1.1 (OK)
qdarkstyle >=2.7             :  2.8 (OK)
qtawesome >=0.5.7            :  0.6.1 (OK)
qtconsole >=4.6.0            :  4.6.0 (OK)
qtpy >=1.5.0                 :  1.9.0 (OK)
rtree >=0.8.3                :  0.9.3 (OK)
sphinx >=0.6.6               :  2.4.0 (OK)
spyder_kernels >=1.8.1;<2.0.0:  1.8.1 (OK)
watchdog                     :  None (OK)
cython >=0.21                :  0.29.15 (OK)
matplotlib >=2.0.0           :  3.1.3 (OK)
numpy >=1.7                  :  1.18.1 (OK)
pandas >=0.13.1              :  1.0.1 (OK)
scipy >=0.17.0               :  1.4.1 (OK)
sympy >=0.7.3                :  1.5.1 (OK)

[jitseniesen]

Thanks for the report. This is probably the same issue as reported in #213, which is fixed in version 0.2.2 of spyder-notebook, coincidentally released two days ago. So please upgrade.

If the error persists after upgrading, do let me know and I will have another look.