What Will Happen to Messages That Were Already Sent but Not Yet Consumed?
It depends on the message mode you used when you are sending the messages. If you use message mode PERSISTENT the messages will stay and will be delivered successfully. That will happen even in case of failure and in case of cluster restart. If you use NON_PERSISTENT there is no guarantee that the messages will stay. As you might guess using persistent flag will produce some performance overhead. Its up to you to choose the mode that best suits you.
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- What Will Happen to Messages That Were Already Sent but Not Yet Consumed?
