VS Code freezes debugging ASP.Net Core application

[niklaskarl]

Environment data

Version:          Code 1.30.2 (61122f88f0bf01e2ac16bdb9e1bc4571755f5bd8, 2019-01-07T22:54:13.295Z)
OS Version:       Windows_NT x64 10.0.15063
CPUs:             Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz (4 x 2712)
Memory (System):  7.86GB (1.54GB free)
VM:               0%
Screen Reader:    no
Process Argv:
GPU Status:       2d_canvas:                    enabled
                  checker_imaging:              disabled_off
                  flash_3d:                     enabled
                  flash_stage3d:                enabled
                  flash_stage3d_baseline:       enabled
                  gpu_compositing:              enabled
                  multiple_raster_threads:      enabled_on
                  native_gpu_memory_buffers:    disabled_software
                  rasterization:                enabled
                  video_decode:                 enabled
                  video_encode:                 enabled
                  webgl:                        enabled
                  webgl2:                       enabled
CPU %   Mem MB     PID  Process
    0       68   16920  code main
    0      115   17476     gpu-process
    0      231   17896     window (XXXXX.html - XXXXX - Visual Studio Code)
    0       47   13324       C:\Users\XXXXX\.vscode\extensions\ms-vscode.csharp-1.17.1\.debugger\vsdbg-ui.exe
    0        6    9100         console-window-host (Windows internal process)
    0      151   13712         "C:\Program Files\dotnet\dotnet.exe" C:\Users\XXXXX\Documents\Source\Repos\XXXXX\src\XXXXX\bin\Debug\netcoreapp2.1\P3Group.Daimler.Trucks.QPortal.dll
    0        6   19140           "cmd" /c npm run start -- --port 50198
    0       26   15884             electron_node npm-cli.js
    0        6   17080               C:\Windows\system32\cmd.exe /d /s /c ng serve "--port" "50198"
    0      506    1208                 node   "C:\Users\XXXXX\Documents\Source\Repos\XXXXX\src\XXXXX\ClientApp\node_modules\.bin\\..\@angular\cli\bin\ng" serve "--port" "50198"
    0      175   17696                   electron_node worker.js
    0       21   17552       searchService
    0       11   18084       electron-crash-reporter
    0       14   18152       watcherService
    0        6   18164         console-window-host (Windows internal process)
    0       91   18216       extensionHost
    0       31   17568         "C:\Users\XXXXX\AppData\Local\Programs\Microsoft VS Code\Code.exe" "c:\Users\XXXXX\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\html-language-features\server\dist\htmlServerMain" --node-ipc --clientProcessId=18216
    0       29   19040         C:\Users\XXXXX\.vscode\extensions\ms-vscode.csharp-1.17.1\.razor\rzls.exe -lsp --logLevel None
    0        6   19108           console-window-host (Windows internal process)
    0        5   19264         cmd /s /c "C:\Users\XXXXX\.vscode\extensions\ms-vscode.csharp-1.17.1\.omnisharp\1.32.8\OmniSharp.exe -s c:\Users\XXXXX\Documents\Source\Repos\XXXXX\XXXXX.sln --hostPID 18216 --stdio DotNet:enablePackageRestore=false --encoding utf-8 --loglevel information --plugin C:\Users\XXXXX\.vscode\extensions\ms-vscode.csharp-1.17.1\.razor\OmniSharpPlugin\Microsoft.AspNetCore.Razor.OmniSharpPlugin.dll formattingOptions:useTabs=false formattingOptions:tabSize=4 formattingOptions:indentationSize=4"
    0        6   19292           console-window-host (Windows internal process)
    0       93   19336           C:\Users\XXXXX\.vscode\extensions\ms-vscode.csharp-1.17.1\.omnisharp\1.32.8\OmniSharp.exe  -s c:\Users\XXXXX\Documents\Source\Repos\XXXXX\XXXXX.sln --hostPID 18216 --stdio DotNet:enablePackageRestore=false --encoding utf-8 --loglevel information --plugin C:\Users\XXXXX\.vscode\extensions\ms-vscode.csharp-1.17.1\.razor\OmniSharpPlugin\Microsoft.AspNetCore.Razor.OmniSharpPlugin.dll formattingOptions:useTabs=false formattingOptions:tabSize=4 formattingOptions:indentationSize=4
    0       61   18268     shared-process
Workspace Stats:
|  Window (XXXXX.html - XXXXX - Visual Studio Code)
|    Folder (XXXXX): 2989 files
|      File types: js(943) dll(280) scss(232) html(178) md(175) cs(162)
|                  json(134) css(130) map(99) png(98)
|      Conf files: package.json(23) tsconfig.json(4) csproj(3) tslint.json(2)
|                  grunt.js(2) sln(1) launch.json(1) settings.json(1)
|                  tasks.json(1)
|      Launch Configs: chrome coreclr

VS Code version: 1.30.2 C# Extension version: 1.17.1

Problem

I am debugging a fairly simple ASP.Net Core application and it freezes the whole VS Code window. The system is still running smoothly. VS Code doesn't respond to clicks or keystrokes and I am not even able to abort the debugging session.

Looking at the environment data the freeze seems to come from the C# extension. I never had problems debugging this application before and a restart doesn't fix the problem either. Is there any other information I can attach to this bug report?

[niklaskarl]

As suspected in #2826 I can confirm that the issue only occurs when the Debug Console is open. VS Code seems to freeze for some seconds every time a new message is printed to the window.

I have no problems with the Debug panel, the problem seems to be the Debug Console.

[niklaskarl]

Just crosschecked with other debugger extensions to make sure the problem is with Omnisharp and not with the Debug Console itself. E.g. the Chrome debugger extension stays responsive even though I flushed it with a ton of messages.

[guylando]

+1

[igniztion]

+1

The CPU usage seems to be exaggerated when the VS Code window is out of focus with the debug console active. If the window is still somewhat responsive, clearing the Debug Console output alleviates the issue for a short while.

[akshita31]

cc @gregg-miskelly

[jrrcdev]

Same problem, any solution?

[marcinstl]

Are there any solutions to this? My vscode freezes for up to 20 seconds when a breakpoint is reached or any exception in my code was thrown.