My app stopped working - instance type change

Question

I'm very new to AWS and relatively clueless how this works in general. Specifically, our app stopped working (it's not functional to the public) when I changed its instance type. I increased it from medium to xlarge.

I've done this change before but in previous experiences, the app returned to its functional form eventually. It's the first time that it no longer works. What is the workaround for this particular situation? Did me changing the instance type really affect the app's functionality?

Thank you for the help.

Answer

The increase in instance type can affect the functionality of your app if the new instance type has different hardware or network configuration than the previous instance type. It can cause changes in the application environment that can cause compatibility issues.

Here are a few steps to troubleshoot the issue:
1. Check the instance's system logs, application logs, and error messages for any information that can help you determine the cause of the problem.
2. Verify that the required libraries, dependencies, and software are installed on the new instance type.
3. Test the app in a new environment by launching a new instance of the same type and configuring it with the same settings as the original instance.
4. Check for any compatibility issues between the app and the new instance type.
5. If the issue persists, reach out to AWS Support for further assistance. They can provide guidance on how to resolve the issue and get your app back up and running.

Remember to take snapshots or backups of the instance and its data before making any changes or troubleshooting, in case you need to revert to the previous configuration.

My app stopped working - instance type change

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