7.52Error mapping example

Suppose you call two downstream APIs:

Credit API
Shipping API

Both can produce:

HTTP:INTERNAL_SERVER_ERROR

But business semantics differ.

Mule supports mapping errors:

Credit failure
→ APP:CREDIT_SERVICE_FAILURE

Shipping failure
→ APP:SHIPPING_SERVICE_FAILURE

Then your main handler can make different decisions. This is one reason MuleSoft explicitly recommends error mapping when otherwise-identical connector errors need to be distinguished.