Azure Web App: Zip deployment fails on zip files created through Powershell

Question

I have a Azure Web App with NodeJS Runtime. I am using the following command to deploy published zip files.

az webapp deploy --resource-group test-rg --name AppName001 --src-path C:\path\to\publish.zip --type zip

It works fine when I create a zip using windows explorer. However, when I create a zip file through the following powershell command, the deployment fails.

 Compress-Archive -Path "c:\path\to\bin\Release\*" -DestinationPath "c:\path\to\publish.zip" -Force

When I access the deployment logs in the Azure portal, I see the following (clipped version).

An error has occurred during web site deployment.

Rsync failed in 135 seconds, Error: rsync: [receiver] open "/home/site/wwwroot/node_modules\.bin

ode-which.ps1" failed: Invalid argument (22)

rsync: [receiver] open "/home/site/wwwroot/node_modules\@eslint-community\eslint-utils\index.d.mts" failed: Invalid argument (22)

rsync: [receiver] open "/home/site/wwwroot/node_modules\@eslint-community\eslint-utils\index.mjs.map" failed: Invalid argument (22)

rsync: [receiver] open "/home/site/wwwroot/node_modules\@eslint-community\eslint-utils

node_modules\eslint-visitor-keys\lib\visitor-keys.js" failed: Invalid argument (22)

rsync: [receiver] open "/home/site/wwwroot/node_modules\@eslint-community\regexpp\LICENSE" failed: Invalid argument (22)

rsync: [receiver] open "/home/site/wwwroot/node_modules\@eslint\config-helpers\dist\cjs\index.cjs" failed: Invalid argument (22)

rsync: [receiver] open "/home/site/wwwroot/node_modules\@eslint-community\eslint-utils\README.md" failed: Invalid argument (22)

What am I missing?

mclayton · Accepted Answer · 2025-09-29 11:18:48Z

1

If you're using Windows Powershell 5.1, this answer - https://superuser.com/a/1382853 - suggests there’s an issue with old versions of dotnet framework using \ in paths in the internal zip directory so it doesn't unzip correctly on Linux (it treats the backslash as part of a filename rather than a path separator).

This seems likely given the mix of \ and / in the paths in your error message - for example:

rsync: [receiver] open "/home/site/wwwroot/node_modules\@eslint-community\eslint-utils\index.d.mts" failed: Invalid argument (22)

Try using Powershell (Core) 7+ instead and it might fix your problem.

answered Sep 29 at 11:18

mclayton

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