App Service error when deploying code 500.30

Copper Contributor

I have a test web app running on Azure and its been deployed as an App Service for months, until recently I was able to publish from Visual Studio to it no problem but it has recently started showing the 500.30 error after publishing (app failing to start). I've noticed if I create a brand new app service its fine, its only when I re-publish it fails (checked the publish settings numerous times and its the same as when i do a new publish that works).


To add to the issue yesterday after a new publish it went down after a few hours. I've reviewed the event logs for the app and I can see its initiating a shutdown (see error below - i changed commit / computer values since it might be specific to my account), but I am now a bit stuck on how to diagnose this or the possible causes.




<Provider Name="IIS AspNetCore Module V2"/>
<TimeCreated SystemTime="2022-02-02T19:25:31Z"/>
<Data>Application 'MACHINE/WEBROOT/APPHOST/TESTAPP' has shutdown.</Data>
<Data>Process Id: 2172.</Data>
<Data>File Version: 15.0.21196.9. Description: IIS ASP.NET Core Module V2 Request Handler. Commit: c663adee8e64ba5d379fa0edfb8201984a7df7d0</Data>



Has anyone run in to this before and can they point in the right direction? The app is .Net Core 5 and is built in Visual Studio. When we republish we tick the box to delete the previous files as well which I see is a common fix for this issue.

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