[jboss-jira] [JBoss JIRA] Commented: (JGRP-458) NAKACK: REBROADCAST_MSGS blocks forever

[Bela Ban (JIRA)]

    [ http://jira.jboss.com/jira/browse/JGRP-458?page=comments#action_12367827 ] 
            
Bela Ban commented on JGRP-458:
-------------------------------

Added more unit tests. The bug was fixed through *multicasting* the retransmission request. In the following scenario:
- {A,B,C}, B drops messages from C
- C multicasts 5 messages
- C crashes
- B now needs to retransmit C's 5 messages, but if it sends the XMIT-REQ to C, it will fail. However, if it uses a multicast, A will receive the XMIT-REQ too and retransmit C's 5 messages to B
- Note that with such a mechanism, setting NAKACK.discard_delivered_msgs to false is essential !

> NAKACK: REBROADCAST_MSGS blocks forever
> ---------------------------------------
>
>                 Key: JGRP-458
>                 URL: http://jira.jboss.com/jira/browse/JGRP-458
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 2.4.1 SP1
>            Reporter: Bela Ban
>         Assigned To: Bela Ban
>             Fix For: 2.5
>
>
> If max_rebroadcast_timeout is high, then that event never returns. 

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