Scenario 2: DataReader Restarts While DataWriter Stays Up (Durable Reader State)
In this scenario, two DomainParticipants join a domain; one creates a DataWriter and the other a DataReader on the same Topic. The DataWriter publishes some data ("a" and "b") that is received by the DataReader. After this, the DataReader shuts down (gracefully or due to a fault) and then restarts—all while the DataWriter remains present in the domain.
Depending on whether the DataReader is configured with Durable Reader State, the DataReader may or may not receive a duplicate copy of the data it received before it restarted. This is illustrated in Figure: Durable Reader State. For more information, see Durable Reader State.
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