UNICAST2: first-message-lost problem ------------------------------------ Key: JGRP-1563 URL: https://issues.jboss.org/browse/JGRP-1563 Project: JGroups Issue Type: Bug Reporter: Bela Ban Assignee: Bela Ban Fix For: 3.2.6, 3.3 If A sends its first message A#1 to B, but the network drops A#1, B won't be able to receive A#1 unless A sends another message. Even the stable task won't help: as B only sends stable messages to connected members (and A isn't), it will never send a stable message to A. SOLUTION: - Use acking for the first message - Continue sending the first message until it has been acked, or a configurable time period has elapsed - Note that we cannot cancel this task based on *membership* (view changes), as unicast messages can be sent to members outside of our view