[jboss-jira] [JBoss JIRA] (JGRP-2167) Highest seqno is not resent nor recorded on receivers

[Radim Vansa (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-2167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13394512#comment-13394512 ] 

Radim Vansa commented on JGRP-2167:
-----------------------------------

Then I suggest adding another counter (hs = highest sent?) that will keep this information, and test this in {{LastSeqnoResender}}.

>  I suggest this as a workaround for now

I've already sent a PR with this workaround to Infinispan, but since you've closed this as 'Won't fix', do you intend to ignore this issue completely? Have you considered setting the default value for {{resend_last_seqno_max_times}} to a very high value? A situation like this is non-trivial to detect & analyze, and user can end up with blocked application for no obvious reason.

> Highest seqno is not resent nor recorded on receivers
> -----------------------------------------------------
>
>                 Key: JGRP-2167
>                 URL: https://issues.jboss.org/browse/JGRP-2167
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 4.0.1
>            Reporter: Radim Vansa
>            Assignee: Bela Ban
>             Fix For: 4.0.2
>
>
> I am investigating an issue in a stress test which leads me to a situation where in a TCP-based configuration a {{GMS[VIEW]}} is broadcast to all nodes, but it is not received by some of them. Soon after that there's a {{NAKACK2.HIGHEST_SEQNO}} that causes the node that is missing the last seqno to resend it, but the retransmit is not received either. There are no further retries, and generally no NAKACK2 activity until about 30 seconds later (when another node leaves after some timeout in the test).
> The receiver does not keep asking for retransmissions until it gets them, but it seems that {{NAKACK2.handleHighestSeqno}} doesn't update {{Table.hr}} (not sure if having highest received set to non-received msg would be legal, though).
> The sender uses default value {{NAKACK2.resend_last_seqno_max_times=1}}, and as there are no further mcast messages, the highest sent seqno does not change on sender. 



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