Microsoft.CodeAnalysis.LanguageServer server crashed 5 times in the last 3 minutes

[mikekistler]

Type: Bug

The C# extension (I think) crashes with this message when I open a Polyglot notebook inside a devcontainer for .NET 9:

The Microsoft.CodeAnalysis.LanguageServer server crashed 5 times in the last 3 minutes. The server will not be restarted. See the output for more information.

I did look at #5964 but at end of this is a request to open new issues if the problem recurs, so I'm doing that.

I've captured the full log and will post it once the issue is open.

Extension version: 2.45.25 VS Code version: Code 1.94.0 (d78a74bcdfad14d5d3b1b782f87255d802b57511, 2024-10-02T13:08:12.626Z) OS version: Darwin arm64 24.0.0 Modes: Remote OS version: Linux arm64 6.10.4-linuxkit

System Info

|Item|Value| |---|---| |CPUs|Apple M1 Pro (10 x 2400)| |GPU Status|2d_canvas: enabled
canvas_oop_rasterization: enabled_on
direct_rendering_display_compositor: disabled_off_ok
gpu_compositing: enabled
multiple_raster_threads: enabled_on
opengl: enabled_on
rasterization: enabled
raw_draw: disabled_off_ok
skia_graphite: disabled_off
video_decode: enabled
video_encode: enabled
webgl: enabled
webgl2: enabled
webgpu: enabled
webnn: disabled_off| |Load (avg)|2, 2, 6| |Memory (System)|32.00GB (1.31GB free)| |Process Argv|. --crash-reporter-id 419d896f-7e85-4c21-8845-5a77abdaec9d| |Screen Reader|no| |VM|0%| |Item|Value| |---|---| |Remote|Dev Container: C# (.NET) @ desktop-linux| |OS|Linux arm64 6.10.4-linuxkit| |CPUs|unknown (10 x 0)| |Memory (System)|7.66GB (4.40GB free)| |VM|0%|

A/B Experiments

``` vsliv368cf:30146710 vspor879:30202332 vspor708:30202333 vspor363:30204092 vscod805cf:30301675 binariesv615:30325510 vsaa593cf:30376535 py29gd2263:31024239 c4g48928:30535728 azure-dev_surveyone:30548225 962ge761:30959799 pythongtdpath:30769146 welcomedialog:30910333 pythonnoceb:30805159 asynctok:30898717 pythonmypyd1:30879173 h48ei257:31000450 pythontbext0:30879054 accentitlementsc:30995553 dsvsc016:30899300 dsvsc017:30899301 dsvsc018:30899302 cppperfnew:31000557 dsvsc020:30976470 pythonait:31006305 dsvsc021:30996838 9c06g630:31013171 a69g1124:31058053 dvdeprecation:31068756 dwnewjupytercf:31046870 2f103344:31071589 impr_priority:31102340 nativerepl2:31139839 refactort:31108082 pythonrstrctxt:31112756 flightc:31134773 wkspc-onlycs-t:31132770 wkspc-ranged-t:31151552 cf971741:31144450 defaultse:31146405 iacca1:31150322 notype1:31151523 cc771715:31146322 ```

[mikekistler]

Full log is attached.

log.txt

[dibarbet]

@mikekistler would you mind also posting the 'C# LSP Trace log' output window contents? Looks like we're getting an invalid URI and the C# LSP trace logs should help figure out what is creating it. You can see instructions for enabling the trace log here - https://github.com/dotnet/vscode-csharp/blob/main/SUPPORT.md#collecting-general-logs

[Error - 2:02:49 PM] [LanguageServerHost] System.UriFormatException: Invalid URI: The hostname could not be parsed.
   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind, UriCreationOptions& creationOptions)
   at System.Uri..ctor(String uriString)

[mikekistler]

Here's the new log. One observation is that it seems that I need to have the Polyglot notebooks extension installed in order to repro.

log2.txt

[mikekistler]

This is still happening for me, and quite frequently. Is there any additional debug information I can provide?

[dibarbet]

@mikekistler apologies for the delay - it looks like you attached the C# output window logs, but in this case I'll need to look at the logs from the C# LSP Trace Logs output window, if you wouldn't mind collecting those.

Thanks!

[mikekistler]

Okay ... just had this occur again and attempted to collect the C# LSP Trace Logs but found they are empty:

However, I think I can give more details on a recreate scenario now. What I did to cause this failure was attempt to open a polyglot notebook file when running VSCode in a dev container with both .NET 8 and .NET 9 SDKs installed.

After opening in the container, .cs files open file and C#/DevKit is working. Then I open a polyglot notebook (.ipynb) and that cause the failure. From that point on C#/DevKit is dead and I have to rebuild the container to get it back to functional again.

I think I can probably recreate this at will so if there is any other debugging information you need to help debug this just let me know. Or if you want to do a live debug session I'm also happy to make time for that.