RuntimeError: This event loop is already running

[ankitAMD]

(abc) assetone04@assetone04-Vostro-3490:~/Music/lending-club-loan-data$ jupyter notebook [I 15:58:53.734 NotebookApp] Serving notebooks from local directory: /home/assetone04/Music/lending-club-loan-data [I 15:58:53.734 NotebookApp] The Jupyter Notebook is running at: [I 15:58:53.734 NotebookApp] http://localhost:8888/?token=860784b5708dc15e063cc73c49f9adb38f29a90202a54124 [I 15:58:53.734 NotebookApp] or http://127.0.0.1:8888/?token=860784b5708dc15e063cc73c49f9adb38f29a90202a54124 [I 15:58:53.734 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation). [C 15:58:53.738 NotebookApp]

To access the notebook, open this file in a browser:
    file:///home/assetone04/.local/share/jupyter/runtime/nbserver-7367-open.html
Or copy and paste one of these URLs:
    http://localhost:8888/?token=860784b5708dc15e063cc73c49f9adb38f29a90202a54124
 or http://127.0.0.1:8888/?token=860784b5708dc15e063cc73c49f9adb38f29a90202a54124

[I 15:59:06.883 NotebookApp] Kernel started: 43252552-72c5-4aff-98be-14be7bf834f9 ERROR:tornado.general:Uncaught exception in ZMQStream callback Traceback (most recent call last): File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/zmq/eventloop/zmqstream.py", line 438, in _run_callback callback(*args, kwargs) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/tornado/stack_context.py", line 277, in null_wrapper return fn(*args, *kwargs) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel/kernelbase.py", line 283, in dispatcher return self.dispatch_shell(stream, msg) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel/kernelbase.py", line 233, in dispatch_shell self.pre_handler_hook() File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel/kernelbase.py", line 248, in pre_handler_hook self.saved_sigint_handler = signal(SIGINT, default_int_handler) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/signal.py", line 47, in signal handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler)) ValueError: signal only works in main thread ERROR:tornado.general:Uncaught exception in zmqstream callback Traceback (most recent call last): File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/zmq/eventloop/zmqstream.py", line 456, in _handle_events self._handle_recv() File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/zmq/eventloop/zmqstream.py", line 486, in _handle_recv self._run_callback(callback, msg) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/zmq/eventloop/zmqstream.py", line 438, in _run_callback callback(args, kwargs) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/tornado/stack_context.py", line 277, in null_wrapper return fn(*args, kwargs) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel/kernelbase.py", line 283, in dispatcher return self.dispatch_shell(stream, msg) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel/kernelbase.py", line 233, in dispatch_shell self.pre_handler_hook() File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel/kernelbase.py", line 248, in pre_handler_hook self.saved_sigint_handler = signal(SIGINT, default_int_handler) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/signal.py", line 47, in signal handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler)) ValueError: signal only works in main thread ERROR:tornado.application:Exception in callback functools.partial(<function ZMQStream._update_handler.. at 0x7fe0743 Traceback (most recent call last): File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/tornado/ioloop.py", line 743, in _run_callback ret = callback() File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/zmq/eventloop/zmqstream.py", line 542, in self.io_loop.add_callback(lambda : self._handle_events(self.socket, 0)) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/zmq/eventloop/zmqstream.py", line 456, in _handle_events self._handle_recv() File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/zmq/eventloop/zmqstream.py", line 486, in _handle_recv self._run_callback(callback, msg) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/zmq/eventloop/zmqstream.py", line 438, in _run_callback callback(*args, *kwargs) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/tornado/stack_context.py", line 277, in null_wrapper return fn(args, kwargs) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel/kernelbase.py", line 283, in dispatcher return self.dispatch_shell(stream, msg) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel/kernelbase.py", line 233, in dispatch_shell self.pre_handler_hook() File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel/kernelbase.py", line 248, in pre_handler_hook self.saved_sigint_handler = signal(SIGINT, default_int_handler) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/signal.py", line 47, in signal handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler)) ValueError: signal only works in main thread Traceback (most recent call last): File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/runpy.py", line 193, in _run_module_as_main "main", mod_spec) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/runpy.py", line 85, in _run_code exec(code, run_globals) File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel_launcher.py", line 16, in app.launch_new_instance() File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/traitlets/config/application.py", line 664, in launch_instan app.start() File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/ipykernel/kernelapp.py", line 477, in start ioloop.IOLoop.instance().start() File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/site-packages/tornado/platform/asyncio.py", line 148, in start self.asyncio_loop.run_forever() File "/home/assetone04/anaconda2/envs/abc/lib/python3.6/asyncio/base_events.py", line 408, in run_forever

RuntimeError: This event loop is already running

@thtrieu @abagshaw PLease help .......................

[ankitAMD]

i solve this issue in several steps .........i don't know about technical knowledge of this issue but in my case i tell you about how i solve.....

                      1. First i type on terminal to check packages ...... 
                         conda list

                      2. After then i see there are two tornado packages one are installed by pip and other are installed by conda . tornado 6.0.0 version are installed by pip and tornado:   4.5.2-py36_0. version are installed by conda

                      3. after then i uninstalled "tornado of conda version" using command  
                              conda uninstall tornado 
                       so uninstalling tornado automatically  ipykernel: 4.6.1-py36_0 are also uninstalled.

                       4. again i installed tornado 
                          conda install tornado

                       5. after than i run jupyter notebook it shows error 
                           "  /home/assetone04/anaconda2/envs/abc/bin/python: No module named ipykernel_launcher "

                         6. after then i install
                           pip install ipykernel

after this passing below command on terminal, the notebook runs properly.

                            " jupyter notebook "