[jboss-jira] [JBoss JIRA] (JGRP-825) Message: add a flag to discard own multicast

[Bela Ban (JIRA)]

     [ https://issues.jboss.org/browse/JGRP-825?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bela Ban resolved JGRP-825.
---------------------------

    Fix Version/s: 3.5
                       (was: Future)
       Resolution: Duplicate Issue


In 3.5, messages are looped back by default, so this issue is moot
                
> Message: add a flag to discard own multicast
> --------------------------------------------
>
>                 Key: JGRP-825
>                 URL: https://issues.jboss.org/browse/JGRP-825
>             Project: JGroups
>          Issue Type: Feature Request
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 3.5
>
>
> If we have a group consisting of members {A,B,C} and A wants to multicast to the group, it will receive its own message too. To avoid this, A can set option LOCAL on its channel to false, meaning that all messages sent by A will get discarded by A's channel.
> The problem here is that those messages need to get handled nevertheless (e.g. by NAKACK, including retransmissions), all the way up the stack, until they hit the channel - only to be discarded there. This is a waste of resources (CPU and memory).
> A solution is to discard the multicast at the transport level. If a message has a flag LOCAL set to false, then TP discards it if
> - the message is a multicast message and
> - the sender of the message is the local member

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