[jboss-jira] [JBoss JIRA] (JGRP-2159) Delta view cannot be installed

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-2159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13370032#comment-13370032 ] 

Bela Ban commented on JGRP-2159:
--------------------------------

Unit test now reproduces the issue.
Reusing {{Event.GET_CURRENT_VIEW}} to ask the sender of an incompatible delta view for a full view.

> Delta view cannot be installed
> ------------------------------
>
>                 Key: JGRP-2159
>                 URL: https://issues.jboss.org/browse/JGRP-2159
>             Project: JGroups
>          Issue Type: Bug
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 4.1, 4.0.1
>
>         Attachments: discarded_delta_view.log
>
>
> A DeltaView cannot be installed because the ref view-id is not the current view-id. 
> Looking at the view sequence for members J, K and L:
> {noformat}
> 19:22:54,278 DEBUG (testng-Test:[]) [GMS] J: installing view [J|0] (1) [J]
> 19:22:56,519 DEBUG (testng-Test:[]) [GMS] K: installing view [J|1] (2) [J, K]
> 19:22:56,572 DEBUG (jgroups-7,J:[]) [GMS] J: installing view [J|1] (2) [J, K]
> 19:22:56,590 DEBUG (jgroups-5,K:[]) [GMS] K: installing view [J|2] (2) [J, K]
> 19:22:58,585 DEBUG (jgroups-5,J:[]) [GMS] J: installing view [J|3] (3) [J, K, L]
> 19:23:00,603 DEBUG (testng-Test:[]) [GMS] L: installing view [J|3] (3) [J, K, L]
> {noformat}
> K cannot install DeltaView J|3 because it has view J|2 but the DeltaView has ref view-id J|1.
> The reason is that J|2 was apparently installed *only* at K (but not at coordinator J1!), despite it being the same view as J|1.
> We need to look into why J|2 was installed at K only. Second line of defense: when a DeltaView cannot be installed, send a message to the view sender (coord) and solicit the full view instead.
> See the attached log.



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