IRequestExceptionHandler can not handle exceptions thrown by pipelinebehaviours

[onurguler1]

Hi, in my sceneraio I have 1 exceptionhandler, 2 pipeline behaviour validation and logging. I registered them by order that I want as below: services.AddTransient(typeof(IRequestExceptionHandler<,,>), typeof(ExceptionHandlingBehaviour<,,>)); services.AddTransient(typeof(IPipelineBehavior<,>), typeof(ValidationBehaviour<,>)); services.AddTransient(typeof(IPipelineBehavior<,>), typeof(LoggingBehaviour<,>));

When a validationException thrown by validationbehaviour, exceptionhandlingbehaviour can not handle.

[github-actions[bot]]

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[jbogard]

This is because the order isn't right. Exception behaviors should be the outermost ones.

[jbogard]

Also it doesn't look like you're using the AddMediatR method, that confuses things here. This looks like a container issue here.