[jboss-jira] [JBoss JIRA] Closed: (JGRP-170) upTbl should be cleared in _upViewChange()

[Bela Ban (JIRA)]

     [ http://jira.jboss.com/jira/browse/JGRP-170?page=all ]

Bela Ban closed JGRP-170.
-------------------------

    Resolution: Out of Date

TOTAL was canned in 2.5

> upTbl should be cleared in _upViewChange()
> ------------------------------------------
>
>                 Key: JGRP-170
>                 URL: http://jira.jboss.com/jira/browse/JGRP-170
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 2.2.9, 2.2.9.1, 2.2.8
>            Reporter: Bela Ban
>         Assigned To: Bela Ban
>             Fix For: 2.x
>
>
>  upTbl should be cleared in _upViewChange().
> Say there are three nodes A,B,C. Suppose there are 10
> outstanding TOTAL sequences say 1-10 (1-5 from A and
> 6-10 from B). Say seq#1 is missing so we have 2-10 in
> every upTbl.
> Now assume the view changes and A and B replayBcast
> (). This time A gets 6-10 and B gets 1-5.
> A lot can go wrong now, say if A's sequences reach in
> reverse order. We have duplicate transmissions from A.
> Its also possible that B's transmission is totally lost.
> I haven't verified all possible scenarios here, but I think
> the above two are quite possible.

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