Which option is NOT a valid location for adding an Error Handler in a Mule application?

Which option is NOT a valid location for adding an Error Handler in a Mule application?

• A. A regular Flow
• B. A try scope
• C. Global Error Handler
• D. Subflows

Answer: (D)

Error handling in Mule is applied at the flow level, inside a try scope, or via a Global Error Handler. A regular flow can define how to react to errors, a try scope provides a local boundary to catch and handle exceptions, and a Global Error Handler applies across the entire application. Subflows do not support attaching an error handler directly to them; they’re reusable steps that rely on the surrounding flow’s or a try scope’s error handling. If an error occurs inside a subflow, it propagates to the caller, which must handle it—typically by wrapping the subflow invocation in a try scope or by using the flow’s error handling.

Error handling in Mule is applied at the flow level, inside a try scope, or via a Global Error Handler. A regular flow can define how to react to errors, a try scope provides a local boundary to catch and handle exceptions, and a Global Error Handler applies across the entire application. Subflows do not support attaching an error handler directly to them; they’re reusable steps that rely on the surrounding flow’s or a try scope’s error handling. If an error occurs inside a subflow, it propagates to the caller, which must handle it—typically by wrapping the subflow invocation in a try scope or by using the flow’s error handling.