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If an exception is thrown by a MessageFilter, it is handled according to the AepEngine.AppExceptionHandlingPolicy for this engine. If the policy is AepEngine.AppExceptionHandlingPolicy.LogExceptionAndContinue, the message is not dispatched to application handlers and is acknowledged.

HA Considerations

Any processing done in a message filter is done outside of a transaction and the effects of processing done in a MessageFilter are not replicated to a backup. It is not legal for a MessageFilter to modify the appliaction's recoverable state or to use any of the engine's messaging facilities. Applications using Event Sourcing should take particular care in this regard as it could lead to divergence between a primary and its backup(s).