[jboss-jira] [JBoss JIRA] Commented: (JGRP-622) Stop flush should be invoked by cluster members individually when flush coordinator leaves

Wed Nov 21 14:33:19 EST 2007

    [ http://jira.jboss.com/jira/browse/JGRP-622?page=comments#action_12388684 ] 

Vladimir Blagojevic commented on JGRP-622:
------------------------------------------

Resolved on HEAD:

  User: vlada   
  Date: 07/11/21 11:29:54

  Modified:    src/org/jgroups/protocols/pbcast FLUSH.java
  Log:
  http://jira.jboss.com/jira/browse/JGRP-623
  http://jira.jboss.com/jira/browse/JGRP-624
  http://jira.jboss.com/jira/browse/JGRP-622

  Revision  Changes    Path
  1.85      +22 -13    JGroups/src/org/jgroups/protocols/pbcast/FLUSH.java

> Stop flush should be invoked by cluster members individually when flush coordinator leaves
> ------------------------------------------------------------------------------------------
>
>                 Key: JGRP-622
>                 URL: http://jira.jboss.com/jira/browse/JGRP-622
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 2.6
>            Reporter: Vladimir Blagojevic
>         Assigned To: Vladimir Blagojevic
>             Fix For: 2.7, 2.6.1
>
>
> Currently when member A who is a coordinator leaves we execute flush coordinator transfer. That is member A starts flush for view V but member B completes it with stop flush. 
> Member B, neighbor of A, receives a view V where coordinator is excluded, it takes over completion of flush. However, when B sends stop flush, then stop flush might arrive at member C *before* view V sent by A. Thus events get reordered. 
> If each remaining member in V detects (through view) that member A left then each one of the members can complete flush individually by "pretending"  that it received stop flush from A.
> This bug is likely to occur only with bundling disabled. 

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