Install and enable the ASP.NET Core Module handler.
Ensure application pool is configured for “No Managed Code”.
Validate web.config references the correct .NET Core runtime.
Proper IIS configuration is required for ASP.NET Core to start successfully.
Troubleshooting App Service Issues
With Azure App Service:
Inspect App Service logs in the Azure portal.
Configure to run in self-hosted mode for more control.
Switch temporary to an App Service plan with more resources.
Check for platform conflicts App Service configuration.
App Service provides limited startup visibility so testing locally first is key.
Preventing 500.30 Errors
Here are some tips for avoiding 500.30 errors proactively:
Follow consistent dependency management with NuGet and private feeds.
Maintain environment parity between local, dev, test, staging, and prod.
Validate configurations across environments and store securely.
Enable application logging to expose startup failures.
Perform blue/green deployments to reduce downtime.
Monitor App Service and application logs closely after deployments.
Careful release management and validation processes will prevent many 500.30 errors.
In summary, HTTP 500.30 errors usually indicate a dependency issue, configuration problem, incompatibility with the hosting environment, or an application bug interfering with ASP.NET Core’s startup sequence.
By following a structured troubleshooting approach, examining application logs, comparing environments, and validating dependencies and configs, you can isolate the specific cause of 500.30 startup failures.
Preventing 500.30 errors requires careful release processes and matching environments across deployments. But robust logging and troubleshooting is key to minimizing downtime when they do occur.
Hopefully this guide gives you a comprehensive understanding of debugging ASP.NET Core 500.30 errors and getting apps back up and running quickly. Let me know if you have any other troubleshooting tips to handle tricky startup failures!
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