How are data collections routed in a Scatter-Gather flow control?

• A. Only the first route receives the message.
• B. Each route processes a different portion of the payload.
• C. Routes are executed sequentially.
• D. The entire message is sent to each route and processed in parallel.

Answer: (D)

Scatter-Gather fan-outs a message to multiple routes in parallel. In this pattern, Mule duplicates the incoming payload and sends the same message to every route inside the scatter, with all routes processing concurrently. After parallel processing, their results are typically gathered by an aggregator. So data collections are routed by delivering the entire message to each route and letting them run in parallel. If you need to handle different parts of a collection with separate routes, you’d split the collection first (for example with a splitter or a For Each) before applying parallel routes.