Error: kernel did not respond about ijulia.jl HOT 17 CLOSED

I am experiencing the same, investigating....

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It looks like my IJulia folder inside of ~/.julia was missing, perhaps from Pkg.add() removing it for some strange reason. Everything works for me after a Pkg.add("IJulia") and Pkg.fixup().

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Yeah, that was the problem. I guess something messed it up amidst the fixups and adds I was doing.

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By the way, it's possible my Pkg.add("Homebrew") command might have messed it up, but can't find my exact history.

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Yes, I think that is possible. In general, whenever you Pkg.add("Homebrew"), after that finishes you should re-try whatever you were trying to do before.

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Also, is homebrew required whenever I install julia from homebrew? I don't remember seeing it on the IJulia readme, but I think it came up as a suggestion after some fixup that I did.

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Yes, the Homebrew.jl package is separate from any Homebrew you happen to have installed on your system. We have designed it that way to keep user configurations as separate from the "known good" configuration we have setup in Homebrew.jl. Plus, that Homebrew is specially patched.

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Hate to bring this up again but I am now getting a ERROR: Kernel did not respond with Julia Version 0.3.0-prerelease+1978.

To complicate things, I tried to build IJulia for Julia Version 0.2 but the current version of Homebrew.jl (v0.0.5) will not build (ERROR: Git not defined).

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@TFGIT, can you file an issue with the Homebrew package about Homebrew failing to build?

What is the output of versioninfo() on your machine?

Does Pkg.build("IJulia") succeed?

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@stevengj I notified Homebrew.jl.

Output of versioninfo():

Julia Version 0.3.0-prerelease+1978
Commit d45ed38* (2014-03-11 23:34 UTC)
Platform Info:
  System: Darwin (x86_64-apple-darwin13.1.0)
  CPU: Intel(R) Core(TM) i7-3615QM CPU @ 2.30GHz
  WORD_SIZE: 64
  BLAS: libopenblas (NO_AFFINITY)
  LAPACK: libopenblas
  LIBM: libopenlibm

Here is the output of Pkg.build("IJulia") for Version 0.3.0-prerelease+1978:

julia> Pkg.build("IJulia")
INFO: Building Homebrew
HEAD is now at c588ffb Remove git rebasing code that slipped through
HEAD is now at b8b84ed Update hdf5 and szip
INFO: Building Nettle
INFO: Building ZMQ
INFO: Building IJulia
Found IPython version 1.2.1 ... ok.
Creating julia profile in IPython...
~/anaconda/lib/python2.7/site-packages/pygments/plugin.py:39: 
UserWarning: Module argparse was already imported from ~/anaconda/python.app/Contents/lib/python2.7/argparse.pyc,
 but ~/anaconda/lib/python2.7/site-packages is being added to sys.path
  import pkg_resources
(Existing KernelManager.kernel_cmd setting in ipython_config.py is untouched.)
(Existing IPythonWidget.execute_on_complete_input setting in ipython_qtconsole_config.py is untouched.)
(Existing FrontendWidget.lexer_class setting in ipython_qtconsole_config.py is untouched.)
(Existing NotebookApp.port setting in ipython_notebook_config.py is untouched.)
(Existing ipynblogo.png file untouched.)
(Existing ipynblogo.svg file untouched.)
(Existing tooltip.js file untouched.)
(Existing custom.js file untouched.)
(Existing julia.js file untouched.)

Here is the output for Pkg.build("IJulia") for Version 0.2:

julia> Pkg.build("IJulia")
INFO: Building Homebrew
==============================[ ERROR: Homebrew ]===============================

Git not defined
at ~/.julia/Homebrew/deps/build.jl:2

================================================================================
INFO: Building Nettle
INFO: Building ZMQ
INFO: Building IJulia
Found IPython version 1.1.0 ... ok.
Creating julia profile in IPython...
(Existing KernelManager.kernel_cmd setting in ipython_config.py is untouched.)
(Existing IPythonWidget.execute_on_complete_input setting in ipython_qtconsole_config.py is untouched.)
(Existing FrontendWidget.lexer_class setting in ipython_qtconsole_config.py is untouched.)
(Existing NotebookApp.port setting in ipython_notebook_config.py is untouched.)
(Existing ipynblogo.png file untouched.)
(Existing ipynblogo.svg file untouched.)
(Existing tooltip.js file untouched.)
(Existing custom.js file untouched.)
(Existing julia.js file untouched.)

================================[ BUILD ERRORS ]================================

WARNING: Homebrew had build errors.

 - packages with build errors remain installed in ~/.julia
 - build a package and all its dependencies with `Pkg.build(pkg)`
 - build a single package by running its `deps/build.jl` script

===============================================================================

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Just an update.

I was able to solve the Homebrew.jl problem (in a round-about way) but now I get the same ERROR: Kernel did not respond on both versions.

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Can you delete (or rename) your ~/.julia and ~/.ipython directories and try installing again from scratch, in case some problematic files were left over from your earlier attempts?

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Deleted both directories twice for versions 0.2 and a recent bleeding-edge version (about 30 minutes ago). Used Pkg.add("IJulia") both times. Got the same results.

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Try julia ~/.julia/IJulia/src/kernel.jl to launch the IJulia kernel manually. It will print out something like connect ipython with --existing XXXX.json, and you can then try connecting IPython manually with e.g. ipython console --existing XXXX.json

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@stevengj
Still does not work. Have you tried doing the same? If it matters, I'm using IPython version 1.2.1 from Anaconda and OS X Mavericks.

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Last I checked, it worked fine for me on OSX 10.9 with Anaconda. I'll check again Monday to see if anything has changed, but I suspect it is something specific to your computer.

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You're right. It started working after commenting out the following on my .bash_profile:
DYLD_LIBRARY_PATH
DYLD_FALLBACK_LIBRARY_PATH
Thanks, and sorry for wasting your time.

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