Best practices for handling errors in Appian integrations

Question

Hello, 
 I&rsquo;m working on a bidirectional integration between Appian and an external system via a middleware gateway. 
 In this setup, we often encounter two categories of errors:

Technical issues

Data issues 
 
 Errors series (500 and 400) 
 
 My question: What are the best practices for functionally handling these types of errors on the Appian side ? 
 Specifically:

Should we simply display messages to end users via pop-ups or alert banners?

Are there recommended design patterns or built-in Appian features we should consider (such as retry logic, logging strategies, fallback mechanisms, or dynamic UI error messages)?

Any advice for differentiating user-facing errors from those logged for admin troubleshooting?

Thanks in advance for your insights!

Mathieu Drouin · Accepted Answer

If you are calling the integration live from an interface, you could possibly display some kind of error to the user. 
 If you are calling the integration in a process model, you can put some retry logic in your process model if the error is intermittent in nature and addressable via a retry. Otherwise you can either just have the process model error out so you can investigate. 
 In addition, you can also choose to log the requests in order to be able to do some reporting on the occurence of certain errors.

Piyush Vaswani · Answer

Best Practices for Handling Integration Errors in Appian:

UI Errors: Show user-friendly banners/pop-ups for 4xx errors when integrations are called from interfaces.

Retry Logic: Use exception flows and timers in process models to retry on 5xx errors.

Logging: Log requests/responses for monitoring and admin troubleshooting.

Error Differentiation: Handle 4xx as data issues for users; treat 5xx as technical issues for admins.

Harsha Sharma · Answer

You can make exception swim lanes/interface rule - depending on where you are invoking the integration from - so that if integration fails (reponse has error codes instead of success code) , users are informed with a message on the interface/email about failure along with corrective measure details like system will retry for 3-4 times and will notify user after successful re-attempts as they occur or they can retry the action again in some time. 
 Along with user's Admin's should be notified as well with error codes/failure reason from the integration call. So you can use 'Send email' node to notify application administrators of the error.

David Jimenez · Answer

From my point of view, the correct approach is the one suggested by Mathieu Drouin because you will have information about techinical and functional errors.

Best practices for handling errors in Appian integrations

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