Answer
Effective handling goes beyond a simple retry loop. Idempotency matters because a retried call that creates a duplicate order or double-posts a transaction can be worse than the original failure, so each request needs a way to detect it has already been processed. Exponential backoff with a defined retry ceiling, rather than an immediate tight retry loop, prevents a struggling downstream system from being hammered into a full outage. Failed messages that exceed the retry limit should land in a dead-letter queue for manual review rather than disappearing silently.
On the IBM i side, integration monitoring works best when it is tied into existing operational visibility, correlating API failures with job logs and system message queues so a support team can see whether the root cause sits in the integration layer or in the underlying application. Alerts should route to whoever can actually act on them, not a shared inbox nobody watches. Buyers should ask a platform vendor to walk through a real failure scenario end to end, from the moment a call fails to the alert reaching a person, rather than accepting a feature list that only names monitoring as a checkbox.