PL-400 Question #423: Real Exam Question with Answer & Explanation

Question

A company requires a plug-in that makes multiple requests to an external web service. The plug- in must not time out when the web service has issues or is slow to respond. You need to create the plug-in. What should you do?

Options

• ARegister the plug-in to run synchronously.
• BRegister the plug-in by using isolation mode = none.
• CSet the HTTP connection timeout value explicitly to limit how long each connection can remain
• DRegister the plug-in step once for each web service request.

Explanation

To prevent a plug-in from timing out when an external web service is slow, the most effective solution is to explicitly set a higher HTTP connection timeout value for the requests made within the plug-in.

Common mistakes.

• A. Registering a synchronous plug-in makes it subject to a strict 2-minute timeout, which will likely cause the plug-in itself to time out if the external web service is slow, rather than preventing timeouts.
• B. Registering a plug-in with isolation mode = none is unsupported and a security vulnerability in Dataverse, and it does not affect external web service timeouts.
• D. Registering plug-in steps defines the trigger points for plug-in execution, not the timeout behavior of HTTP requests made by the plug-in to external web services.

Concept tested. Dataverse plug-in external web service HTTP timeout

Reference. https://learn.microsoft.com/en-us/power-apps/developer/dataverse/best-practices/business-logic/external-web-service-callouts

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