Kernel not found.

[kshitijyad]

Hi ! Thank you for the docker file!
I am facing an error while running this, when I guess:
jupyter nbconvert --execute --ExecutePreprocessor.timeout=-1 --to notebook --inplace build.ipynb
is getting xecuted, I am getting this error:

[NbConvertApp] Converting notebook build.ipynb to notebook Traceback (most recent call last): File "/usr/local/bin/jupyter-nbconvert", line 10, in <module> sys.exit(main()) File "/usr/local/lib/python3.5/site-packages/jupyter_core/application.py", line 267, in launch_instance return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs) File "/usr/local/lib/python3.5/site-packages/traitlets/config/application.py", line 658, in launch_instance app.start() File "/usr/local/lib/python3.5/site-packages/nbconvert/nbconvertapp.py", line 338, in start self.convert_notebooks() File "/usr/local/lib/python3.5/site-packages/nbconvert/nbconvertapp.py", line 508, in convert_notebooks self.convert_single_notebook(notebook_filename) File "/usr/local/lib/python3.5/site-packages/nbconvert/nbconvertapp.py", line 479, in convert_single_notebook output, resources = self.export_single_notebook(notebook_filename, resources, input_buffer=input_buffer) File "/usr/local/lib/python3.5/site-packages/nbconvert/nbconvertapp.py", line 408, in export_single_notebook output, resources = self.exporter.from_filename(notebook_filename, resources=resources) File "/usr/local/lib/python3.5/site-packages/nbconvert/exporters/exporter.py", line 179, in from_filename return self.from_file(f, resources=resources, **kw) File "/usr/local/lib/python3.5/site-packages/nbconvert/exporters/exporter.py", line 197, in from_file return self.from_notebook_node(nbformat.read(file_stream, as_version=4), resources=resources, **kw) File "/usr/local/lib/python3.5/site-packages/nbconvert/exporters/notebook.py", line 32, in from_notebook_node nb_copy, resources = super(NotebookExporter, self).from_notebook_node(nb, resources, **kw) File "/usr/local/lib/python3.5/site-packages/nbconvert/exporters/exporter.py", line 139, in from_notebook_node nb_copy, resources = self._preprocess(nb_copy, resources) File "/usr/local/lib/python3.5/site-packages/nbconvert/exporters/exporter.py", line 316, in _preprocess nbc, resc = preprocessor(nbc, resc) File "/usr/local/lib/python3.5/site-packages/nbconvert/preprocessors/base.py", line 47, in __call__ return self.preprocess(nb, resources) File "/usr/local/lib/python3.5/site-packages/nbconvert/preprocessors/execute.py", line 379, in preprocess with self.setup_preprocessor(nb, resources, km=km): File "/usr/local/lib/python3.5/contextlib.py", line 59, in __enter__ return next(self.gen) File "/usr/local/lib/python3.5/site-packages/nbconvert/preprocessors/execute.py", line 324, in setup_preprocessor self.km, self.kc = self.start_new_kernel(cwd=path) File "/usr/local/lib/python3.5/site-packages/nbconvert/preprocessors/execute.py", line 271, in start_new_kernel km.start_kernel(extra_arguments=self.extra_arguments, **kwargs) File "/usr/local/lib/python3.5/site-packages/jupyter_client/manager.py", line 246, in start_kernel kernel_cmd = self.format_kernel_cmd(extra_arguments=extra_arguments) File "/usr/local/lib/python3.5/site-packages/jupyter_client/manager.py", line 170, in format_kernel_cmd cmd = self.kernel_spec.argv + extra_arguments File "/usr/local/lib/python3.5/site-packages/jupyter_client/manager.py", line 82, in kernel_spec self._kernel_spec = self.kernel_spec_manager.get_kernel_spec(self.kernel_name) File "/usr/local/lib/python3.5/site-packages/jupyter_client/kernelspec.py", line 236, in get_kernel_spec raise NoSuchKernel(kernel_name) jupyter_client.kernelspec.NoSuchKernel: No such kernel named conda_python3

Could you help me with what I am doing wrong?

[ResidentMario]

This failure indicates that your jupyter environment is misconfigured. jupyter is trying to run the command using the conda_python3 kernel, but no such kernel exists on your machine. To verify that this is true, run jupyter kernelspec list and see whether or not the conda_python3 kernel exists on the machine.

I don't know of a way of fixing this issue besides uninstalling and reinstalling conda. If you are running this inside of the SageMaker environment, it's possible that since the last time I ran this code, they have changed the environment image in a way which has broken jupyter commands like this one. I don't know that there is a good solution beyond filing a support ticket with AWS.

[akarve]

@ResidentMario, thank you for weighing in.