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Application error(error 503)

Varda Panchal 20 Reputation points
2023-12-20T03:56:30.8+00:00

This is a simple portfolio with React JS that was supposed to be submitted for Technical onboarding of MLSA program. The website works perfectly fine in the local host and had no error in building but a minor error in deployment which I solved by adding DEPLOY_FROM_PACKAGE in the application setting of configuration.After all the check when I try to open the page it shows
😦 Application Error
If you are the application administrator, you can access the diagnostic resources.
error when I try to see the problem it shows 2 critical issues
Currently not utilizing Health Check feature.
Health Check feature will ping the specified health check path on all instances of your webapp every minute to ensure instances are healthy.
Configure and enable health check feature > When I try to run it the page shows nothing and I cannot edit anything

Distributing your web app across multiple instances
The webapp is currently configured to run on only one instance.
Since you have only one instance you can expect downtime because when the App Service platform is upgraded, the instance on which your web app is running will be upgraded. Therefore, your web app process will be restarted and will experience downtime.

Scale instance count manually or automatically
In MLSA account I don’t have permission to scale out instance.
What should I do? Please help

Azure App Service
Azure App Service

Azure App Service is a service used to create and deploy scalable, mission-critical web apps.

Answer accepted by question author

VenkateshDodda-MSFT 25,251 Reputation points Microsoft Employee Moderator
2023-12-20T07:06:55.7833333+00:00

@Varda Panchal Thanks for reaching out to Microsoft Q&A, apologize for any inconvenience caused on this.

Application errors is a generic error message and this might be caused due to multiple reasons. I would suggest you to enable diagnostic logging and review the log streaming and application logs in app service to identify the error your logs files.
You can run the WebApp down detector under availability and performance in Diagnose and solve problems to understand better.

Refer to these on how to debug your nodejs app service and node js applications on linux containers.

Feel free to reach back to me if you have any further questions on this.

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