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7.7. Synchronous and Asynchronous Distribution

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To elicit meaningful return values from certain public API methods, it is essential to use synchronized communication when using distribution mode.

Example 7.1. Communication Mode example

For example, with three nodes in a cluster, node A, B and C, and a key K that maps nodes A and B. Perform an operation on node C that requires a return value, for example Cache.remove(K). To execute successfully, the operation must first synchronously forward the call to both node A and B, and then wait for a result returned from either node A or B. If asynchronous communication was used, the usefulness of the returned values cannot be guaranteed, despite the operation behaving as expected.
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