eclipse-paho / eclipse-paho/paho.mqtt.java

Quesiton: QoS1 message with PUBACK with next message

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Description

In QoS1 in MQTT:
there are 2 process in MQTT communication,
1.Publisher to Broker
2.Broker to Subscriber
In each process, when the server(publisher/broker) does not receive the PUBACK from the client(broker/subscriber) about **messageA**, will the server keep sending the second message **messageB** to the client? It seems like there is no reference mentioned that clearly.

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