[ http://jira.jboss.com/jira/browse/JGRP-607?page=comments#action_12384051 ] Bela Ban commented on JGRP-607: ------------------------------- The bug is that, when we don't send seqnos in order, then the receiver will always keep the highest seqno, e.g. when we send 1 2 4 3, then - when 4 is received - the highest seqno will be 4 (regardless of whether there is a gap since we haven't yet received 3), and when 3 is finally received, it will get discarded. Solution: maintain the highest received and highest delivered seqno (SeqnoTable) Even if we synchronized down(), this wouldn't help, as 3 and 4 will get sent out in order, but a message loss of 3 might still cause receivers to receive 4 first and then the (retransmitted) 3. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira