After installing [IJulia](https://github.com/JuliaLang/IJulia.jl) and [JuliaCall](https://cran.r-project.org/web/packages/JuliaCall/index.html) on Windows 10, I'm able to get qmd files containing R, Python, and Julia running (though it seems to be running quite slowly). If I try to render a qmd only containing Julia code, a Julia daemon pops up and the file renders fine as long as I keep that open. If I close it, a new daemon doesn't start and I get this error:
![image](https://user-images.githubusercontent.com/6981612/121590028-6e567200-c9fd-11eb-8122-cb96df8bb5c3.png).

If I restart the quarto-cli shell and try to render it again, I get the same error. If I open Task Manager and close this Python application...

![image](https://user-images.githubusercontent.com/6981612/121590507-018fa780-c9fe-11eb-875e-9d112ff86770.png)

...I'm able to render Julia files again. I'm guessing it has something to do Julia being computed through a Jupyter kernel and even though the Julia daemon gets closed, the Python/Jupyter app is staying open and messing with stuff. 

**Steps to reproduce**

A small example file named `julia.qmd`:

    ---
    title: "Matplotlib Demo"
    author: "Norah Smith"
    date: "May 22nd, 2021"
    format: 
      html:
        code-fold: true
    ---
    ## Julia 
    
    ```{julia}    
    using Plots
    x = 1:10; y = rand(10, 2);
    plot(x, y)
    ```
I then ran `quarto render julia.qmd` and ran into the experience outlined above.






2021-06-10T20:16:23Z
pommevilla
closed
Difficulties re-rendering qmd documents containing only Julia code
https://github.com/quarto-dev/quarto-cli/issues/35