#20121: Jupyter dies on incorrect kernel specification
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Reporter: cheuberg | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.1
Component: interfaces | Keywords: jupyter
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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If
1. you used Sage 6.9 on your machine
2. that Sage directory does no longer exist
3. you open a ipynb File last saved with Sage 6.9 in !SageMath 7.0.beta4
then you get a kernel error. Changing the kernel via the menu in this
window does '''not''' help. Changing the kernel, saving the notebook,
reopening the notebook helps.
You can probably substitute 6.9 by older versions.
The reason: Until Sage 6.9 (#19371), a kernel specification file was
written in the user's home directory. This kernel specification file now
has an invalid path and some relevant part of ipython crashes with an
OSError.
{{{
...
File "/local/sage/sage-7.1.beta4/local/lib/python2.7/site-
packages/jupyter_client/launcher.py", line 123, in launch_kernel
proc = Popen(cmd, **kwargs)
File "/local/sage/sage-7.1.beta4/local/lib/python/subprocess.py",
line 710, in __init__
errread, errwrite)
File "/local/sage/sage-7.1.beta4/local/lib/python/subprocess.py",
line 1335, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory
}}}
This OSError should be caught and the standard dialog for a missing kernel
should be invoked.
--
Ticket URL: <http://trac.sagemath.org/ticket/20121>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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