Wait to load the kernel Fatal error: cannot load shared library dlllwt_unix_stubs

[JigaoLuo]

Hi I have installed this kernel, but not able to use that.
Following is appeared, when I want to use the ocaml kernel.
I do try with the default python2 and 3's kernel, they are working!

~$ jupyter notebook
[I 15:29:36.709 NotebookApp] The port 8888 is already in use, trying another port.
[I 15:29:36.710 NotebookApp] The port 8889 is already in use, trying another port.
[I 15:29:36.718 NotebookApp] Serving notebooks from local directory: /home/jigao
[I 15:29:36.718 NotebookApp] The Jupyter Notebook is running at:
[I 15:29:36.718 NotebookApp] http://localhost:8890/?token=aa5f3a3bd8d80c6cdd56359cb162d632267a08c904d6325c
[I 15:29:36.719 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 15:29:36.719 NotebookApp] 
    
    Copy/paste this URL into your browser when you connect for the first time,
    to login with a token:
        http://localhost:8890/?token=aa5f3a3bd8d80c6cdd56359cb162d632267a08c904d6325c
[I 15:29:37.860 NotebookApp] Accepting one-time-token-authenticated connection from 127.0.0.1
Created new window in existing browser session.
[I 15:29:47.811 NotebookApp] Creating new notebook in /Desktop
[I 15:29:49.973 NotebookApp] Kernel started: c425e9d6-e07c-4d48-908d-a8026b869e81
/home/jigao/.opam/4.06.1/share/jupyter/kernel.sh: 1: set: Illegal option -g
[I 15:29:52.968 NotebookApp] KernelRestarter: restarting kernel (1/5), new random ports
/home/jigao/.opam/4.06.1/share/jupyter/kernel.sh: 1: set: Illegal option -g
[I 15:29:55.976 NotebookApp] KernelRestarter: restarting kernel (2/5), new random ports
/home/jigao/.opam/4.06.1/share/jupyter/kernel.sh: 1: set: Illegal option -g
[I 15:29:58.985 NotebookApp] KernelRestarter: restarting kernel (3/5), new random ports
/home/jigao/.opam/4.06.1/share/jupyter/kernel.sh: 1: set: Illegal option -g
[I 15:30:02.026 NotebookApp] KernelRestarter: restarting kernel (4/5), new random ports
/home/jigao/.opam/4.06.1/share/jupyter/kernel.sh: 1: set: Illegal option -g
[W 15:30:05.085 NotebookApp] KernelRestarter: restart failed
[W 15:30:05.085 NotebookApp] Kernel c425e9d6-e07c-4d48-908d-a8026b869e81 died, removing from map.
[W 15:30:50.237 NotebookApp] Timeout waiting for kernel_info reply from c425e9d6-e07c-4d48-908d-a8026b869e81
[E 15:30:50.242 NotebookApp] Error opening stream: HTTP 404: Not Found (Kernel does not exist: c425e9d6-e07c-4d48-908d-a8026b869e81)

I have a chrome Version 69.0.3497.100 (Official Build) (64-bit).
On a ubuntu Release: 18.04
With jupyter notebook --version 5.7.0

I have read #101, but I think no helpful for me. And there is not detailed documented how to solve such kind of problem.
Thanks for all kinds of hints!

Edit: sorry for reopening this issue. But I do have the newest ocaml jupyter kernel. Maybe this problem lays on other place.

 ~> opam install "jupyter>=2.3.4"
[NOTE] Package jupyter is already installed (current version is 2.4.0).

[JigaoLuo]

I found that we must have the 4.06.1 at our PC
Try to use opam switch -y 4.06.1

[akabe]

ocaml-jupyter kernel automatically calls opam switch since v2.3.4. Upgrading and re-registration of the kernel probably solve the trouble more easily:

opam update
opam install "jupyter>=2.3.4"
jupyter kernelspec install --name ocaml-jupyter "$(opam config var share)/jupyter"  # Remember to install the new kernel

[JigaoLuo]

Edit: sorry for reopening this issue. But I still can't figure out how to solve that. All the my information above is already updated. Thanks

[akabe]

I cannot reproduce your problem on Ubuntu 18.04 on Docker. Your environment seems wrong.

docker run -it --rm -p 8888:8888 ubuntu:18.04 bash

Input commands:

apt-get update && \
apt-get install -y curl patch gcc m4 make unzip python3-pip pkg-config libgmp-dev zlib1g-dev libzmq3-dev && \
sh <(curl -sL https://raw.githubusercontent.com/ocaml/opam/master/shell/install.sh) && \
opam init -a --compiler=4.06.1 --disable-sandboxing && \
eval $(opam config env) && \
opam install -y 'jupyter=2.4.0' && \
pip3 install jupyter && \
jupyter kernelspec install --name ocaml-jupyter /root/.opam/4.06.1/share/jupyter && \
jupyter notebook --allow-root --ip=0.0.0.0

[JigaoLuo]

I still have a such a error. Other commands produce no error.

jigao@jigao-CW35S:~$ opam install jupyter-archimedes
The following actions will be performed:
  ∗ install jupyter-archimedes 2.3.2

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[jupyter-archimedes.2.3.2] found in cache

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[ERROR] The compilation of jupyter-archimedes failed at
        "/home/jigao/.opam/opam-init/hooks/sandbox.sh build dune build -p jupyter-archimedes -j
        3".

#=== ERROR while compiling jupyter-archimedes.2.3.2 ===========================#
# context     2.0.1 | linux/x86_64 | ocaml-base-compiler.4.06.1 | https://opam.ocaml.org#7f6dd222
# path        ~/.opam/4.06.1/.opam-switch/build/jupyter-archimedes.2.3.2
# command     ~/.opam/opam-init/hooks/sandbox.sh build dune build -p jupyter-archimedes -j 3
# exit-code   1
# env-file    ~/.opam/log/jupyter-archimedes-6759-05296d.env
# output-file ~/.opam/log/jupyter-archimedes-6759-05296d.out
### output ###
# File "jupyter-archimedes/src/dune", line 10, characters 14-30:
# 10 |               archimedes.cairo))
#                    ^^^^^^^^^^^^^^^^
# Error: Library "archimedes.cairo" in /home/jigao/.opam/4.06.1/lib/archimedes is hidden (unsatisfied 'exist_if').
# Hint: try: dune external-lib-deps --missing -p jupyter-archimedes @@default



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
┌─ The following actions failed
│ λ build jupyter-archimedes 2.3.2
└─ 
╶─ No changes have been performed

[JigaoLuo]

I also have tried to re-install ocaml, opam, pip, pip3. But still have such a error. When I try to use notebook, the ocaml kernel does not appear.

[akabe]

jupyter-archimedes sometimes failed to install because of ocaml/opam-repository#12774 (comment).
opam install -y cairo && opam install -y archimedes && opam install -y jupyter-archimedes will succeed.

I also have tried to re-install ocaml, opam, pip, pip3. But still have such a error. When I try to use notebook, the ocaml kernel does not appear.

I think debugging your environment is hard for me because I cannot reproduce your trouble. I recommend you to use docker.

[JigaoLuo]

The docker works well.