Not able to debug Azure Functions in Visual Studio Code. Debugger stops - azure

Question

I am using http trigger Azure Function. When I am running my application (by pressing F5), after clicking http://localhost:7071/api/HttpTrigger1, I am getting response in browser but code doesn't stop at breakpoints.
After careful observation, I saw that debugger starts for 0.5 seconds and closes automatically.
I have posted the video here. At 5th second, we can see that debugger starts but closes instantly (Orange screen at 5th second).
There is a similar question on Stackoverflow, but that didn't solve my problem.

Answer 1

I have experienced the same, while debugging Azure Functions in VS Code on a Mac. I found this open issue on the Omnisharp GitHub about this issue:
https://github.com/OmniSharp/omnisharp-vscode/issues/4903
In the end, basilfx's workaround ended up helping me:
I was triggered by a log line about code signing in the logging above. I therefore tried the following:
Create self-signed code signing certificate: https://stackoverflow.com/a/58363510/1423623
Navigate to the debugger folder (in my case, ~/.vscode/extensions/ms-dotnettools.csharp-1.24.4-darwin-x64/.debugger/x86_64)
Run codesign --remove-signature vsdbg-ui && codesign --remove-signature vsdbg
Run codesign -s my-codesign-cert vsdbg-ui && codesign -s my-codesign-cert vsdbg
I can now attach to a running instance of ./vsdbg-ui --server --consoleLogging --engineLogging from VS Code that stops at breakpoints. It's a work-around, but it shows something is wrong with the code signing of vsdbg and/or vsdbg-ui.
2022-04-20: can confirm that this still works, using OmniSharp 1.24.4.

Answer 2

Prerequisites to run/debug the Azure Functions in Visual Studio Code:
Azure Tools Extension
Azure Functions Core Tools
Also, Ensure that the Storage Emulator installed on your system, even it is deprecated but still used for local environment debugging and testing purposes
Azurite Extension on VS Code Extensions Menu
local.settings.json
{
"IsEncrypted": false,
"Values": {
"AzureWebJobsStorage": "UseDevelopmentStorage=true",
"FUNCTIONS_WORKER_RUNTIME": "dotnet"
}
}
.csproj file:
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net6.0</TargetFramework>
<AzureFunctionsVersion>v4</AzureFunctionsVersion>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.NET.Sdk.Functions" Version="4.0.1" />
</ItemGroup>
<ItemGroup>
<None Update="host.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</None>
<None Update="local.settings.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
<CopyToPublishDirectory>Never</CopyToPublishDirectory>
</None>
</ItemGroup>
</Project>
Debug Result:
Put a breakpoint at some code line inside the Run Method and Start debugging.
All the code files and debugging video is available in the GitHub Repository and debugging video, please compare each file to your code.
As specified in this VS Code Official Documentation, need to install the language runtime extension for debugging purposes like C# for .NET, Python, Java, JavaScript, PowerShell etc.
For example, for the above .NET Azure Functions Project I have installed this extension in VS Code:
Links to Install these extensions are given in prerequisites and in hyperlink wording formats.
References of VS Code debugging the Azure Functions:
Debugging Azure Functions Locally in VS Code
Microsoft Official Documentation of Azure Functions debugging in VS Code

Answer 3

I have a similar issue.
I have multiple python azure function repositories which i work on in vs-code.
If a file open in the editor has errors (lint errors, mypy errors, etc..)
Whenever i try to launch a debug session the function starts but eventually detach from the debug session.
After this log print:
INFO: Detaching console logging.
Then it won't stop at breakpoints and log debug logs.
Unfortunately I don't have a solution yet.
I do have a working workaround you can try:
Close any open file which has an error (you can close all the files), and launch the debug session (f5), I found this way it's working, stopping at breakpoints and not detaching the debugger.
If you (or anyone) find a working solution please share.

Answer 4

In my case, I'm running on a mac. and this answer worked:
https://github.com/OmniSharp/omnisharp-vscode/issues/4900
Basically I changed my launch.json from:
{
"version": "0.2.0",
"configurations": [
{
"name": "Attach to .NET Functions",
"type": "coreclr",
"request": "attach",
"processId": "${command:azureFunctions.pickProcess}"
}
]
}
to this:
{
"version": "0.2.0",
"configurations": [
{
"name": "Attach to .NET Functions",
"type": "coreclr",
"request": "attach",
"processId": "${command:azureFunctions.pickProcess}",
"targetArchitecture": "x86_64"
}
]
}