Explain the difference between On Error Propagate and On Error Continue.

• A. On Error Continue handles the error and lets the flow continue after performing error handling or a fallback.
• B. On Error Propagate stops the normal flow and propagates the error to an outer scope.
• C. On Error Propagate retries the operation automatically; On Error Continue logs the error.
• D. On Error Propagate converts error to a warning; On Error Continue terminates the flow.

Answer: (B)

In Mule flows, error handling controls whether an error stops the current path or is handled and the flow continues. On Error Propagate escalates the error to an outer scope, stopping the normal flow in the current path and sending the error outward to a caller or a central error handler. This lets higher-level logic decide how to respond, rather than continuing as if nothing happened.

That’s why the correct description is that On Error Propagate stops the normal flow and propagates the error to an outer scope. In contrast, On Error Continue catches the error, performs any error handling or a fallback locally, and then the flow can continue after the handler.

contextual note: The idea that On Error Propagate automatically retries the operation or that On Error Continue simply logs and ends the flow aren’t accurate. On Error Propagate is about escalation, while On Error Continue is about local handling with flow continuation.