Tab completion unresponsive, raising Exception in thread Thread-4 after four times pressing tab.

[zenzjtech]

Below are are the error message of testing auto-completion feature. Date. does not pop up suggestion expected.
For more information on my platforms:
Node version: 7.9.0
python3 versio: 3.5.2
OS: Linux mint 18.3

Traceback (most recent call last):
  File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.5/threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python3.5/dist-packages/prompt_toolkit/interface.py", line 860, in run
    completions = list(buffer.completer.get_completions(document, complete_event))
  File "/usr/local/lib/python3.5/dist-packages/jupyter_console/ptshell.py", line 110, in get_completions
    cursor_pos=document.cursor_position
  File "/usr/local/lib/python3.5/dist-packages/jupyter_console/completer.py", line 39, in complete_request
    msg = self.client.shell_channel.get_msg(timeout=self.timeout)
  File "/usr/local/lib/python3.5/dist-packages/jupyter_client/blocking/channels.py", line 57, in get_msg
    raise Empty
queue.Empty```

[uscmule]

Similar issue here

$ python3 --version
Python 3.5.2

$ npm -v
5.5.1

$ node -v
v8.9.0

$ uname -a
Linux ubuntu 4.10.0-35-generic #39~16.04.1-Ubuntu SMP Wed Sep 13 09:02:42 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

$ git log
commit 1388e19

$ jupyter console --kernel nodejs
Jupyter console 5.2.0

NodeJS For your Jupyter experience!

In [1]: Date.Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/usr/lib/python3.5/threading.py", line 862, in run
self._target(*self._args, **self._kwargs)
File "/usr/local/lib/python3.5/dist-packages/prompt_toolkit/interface.py", line 865, in run
completions = list(buffer.completer.get_completions(document, complete_event))
File "/usr/local/lib/python3.5/dist-packages/jupyter_console/ptshell.py", line 111, in get_completions
cursor_pos=document.cursor_position
File "/usr/local/lib/python3.5/dist-packages/jupyter_console/completer.py", line 39, in complete_request
msg = self.client.shell_channel.get_msg(timeout=self.timeout)
File "/usr/local/lib/python3.5/dist-packages/jupyter_client/blocking/channels.py", line 57, in get_msg
raise Empty
queue.Empty

[leonprou]

Yes I have the same error on Mac OS. But autocompletion for some words is working, like for Number and console.