[jboss-jira] [JBoss JIRA] Commented: (JGRP-1292) UNICAST2: resend other messages when getting request to resend first message

[Raman Gupta (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-1292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12582372#comment-12582372 ] 

Raman Gupta commented on JGRP-1292:
-----------------------------------

As reported on IRC, this fix works on my test case. Thanks.

> UNICAST2: resend other messages when getting request to resend first message
> ----------------------------------------------------------------------------
>
>                 Key: JGRP-1292
>                 URL: https://issues.jboss.org/browse/JGRP-1292
>             Project: JGroups
>          Issue Type: Task
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 2.12
>
>
> When A sends a unicast message to B, A's message #1 is tagged as first. This will create an entry in the receiver table of B. However, when A sends messages #1 and #2 concurrently, then #2 is probably processed first because #1 takes a bit more time to create the entry in the receiver table.
> When #2 is received by B, it is discarded, as it isn't tagged as 'first', and we send a request to A to resend the first seqno.
> However, until A sends message #3, or a stability message is received, A won't retransmit #2 to B. If A was an RPC, it might time out.
> SOLUTION: when asking A to resend the lowest seqno, we also pass in the seqno (#2) we received, that caused us to ask A for the resend.
> A will then resend all messages in the range [lowest .. seqno].

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