Issues while trying out samples

[forki]

@jdh30 reported issues with the azure notebook samples on Twitter: https://twitter.com/jonharrop/status/916312696458502144

I just report it here so that contributors know about it and may check if samples are still up-to-date

[cgravill]

I'm guessing it's this one https://twitter.com/jonharrop/status/916313349272621056

This is working for me:

1. https://notebooks.azure.com/
2. Choose the Introduction to F#
3. Clone
4. Run the relevant cells at the end of the notebook

https://notebooks.azure.com/cgravill/libraries/fsharp_test/html/FSharp%20for%20Azure%20Notebooks.ipynb

Note the preview will not show the hovering circle and instead the the HTML. This is a by-design Jupyter security behaviour: http://jupyter-notebook.readthedocs.io/en/stable/security.html#our-security-model

There are potential safe ways around this.

@jdh30 can you provide any more details on the original bug please?

[cgravill]

On the original tweet, we're demonstrating interactive D3 hence it being long. If someone just wants to draw a circle they can do something shorter:

we should probably make Bitmap types display automatically so the imageToByteArray isn't needed. For various reasons, we tend to work with SVGs which is what this has already been done for.

[jdh30]

No, it was this one:

https://twitter.com/jonharrop/status/916313349272621056

https://pbs.twimg.com/media/DLdmEYIW0AAO8lx.png

https://pbs.twimg.com/media/DLdmFsoWkAYeipG.png

I did exactly what you said (choose F# Intro, Clone, Kernel->Run all). Running in Chrome on Windows 10.

[dsyme]

@cgravill - I can repro the bug by cloning the notebook https://notebooks.azure.com/cgravill/libraries/fsharp_test/html/FSharp%20for%20Azure%20Notebooks.ipynb

Mono version is showing as 5.0.1.1 - I recall a Mono bug that has been fixed in early 5.0.x. I think we should update to 5.2 or 5.4, I tried to use the in-browser terminal (click on Jupyter to left of notebook --> "New" -> "Terminal") to update a running kernel (it should be possible?) but didn't have the nbuser sudo password for the docker image - is it public?

[dsyme]

@jdh30 Thanks for the bug report - we evidently didn't re-validate the notebook after a Mono update

[cgravill]

Thanks @jdh30 that clarifies where the issue is - I was testing later in the notebook based in the initial report. I can reproduce the error in the online Azure Notebooks. It doesn't occur in a local IfSharp Windows install so it'll need digging into.

[cgravill]

@dsyme Mono 5.2.* looks promising as a fix.

On macOS 10.12.6:

Mono JIT compiler version 5.2.0.224 (d15-3/14f2c81 Thu Aug 24 10:33:52 EDT 2017)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
    TLS:           normal
    SIGSEGV:       altstack
    Notification:  kqueue
    Architecture:  amd64
    Disabled:      none
    Misc:          softdebug 
    LLVM:          yes(3.6.0svn-mono-master/8b1520c)
    GC:            sgen (concurrent by default)

The relevant code runs successfully:

type MyType = { FirstName: string; LastName: string }
let records = 
    [|
        { FirstName = "Walter"; LastName = "Harp" }
        { FirstName = "Jeff"; LastName = "Smith" }
        { FirstName = "Ben"; LastName = "Smith" }
        { FirstName = ""; LastName = "Holly" }
    |]

records |> Util.Table

[cgravill]

@dsyme there looks to be a way of getting privileges here https://github.com/Microsoft/AzureNotebooks/issues/112 (I've not tried it as it looks involved...)

[cgravill]

Mono 5.2.0.224 is deployed to Azure Notebooks, and I've validated it there. Let us know if more issues come up.