[jboss-jira] [JBoss JIRA] Resolved: (JGRP-862) JGroups appears to ignore the multicast address when more than one jgoup application is running on the same machine.

[Bela Ban (JIRA)]

     [ https://jira.jboss.org/jira/browse/JGRP-862?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bela Ban resolved JGRP-862.
---------------------------

    Resolution: Rejected


This is because the MulticastReceiverTest does not use the 'right' MulticastSocket() constructor. It uses 

new MulticastSocket(PORT)

If you take a look at UDP.createSockets(), the multicast socket is created through Util.createMulticastSocket() and there we use the mcast address as bind address.

The cross talking issue was fixed in 2.7 and 2.6.6 ().

So if you use 2.6.6 and run the Draw demo with your mcast_addrs, this issue won't pop up

> JGroups appears to ignore the multicast address when more than one jgoup application is running on the same machine.
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: JGRP-862
>                 URL: https://jira.jboss.org/jira/browse/JGRP-862
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 2.6.6
>         Environment: Linxu AS4, Jgroups-2.6.6 , Java version "1.5.0_10"
>            Reporter: Brendan Doherty
>            Assignee: Bela Ban
>             Fix For: 2.6.7
>
>
> Using the multicast send/receiver test application, all on the same physical machine with the following parameters -Djava.net.preferIPv4Stack=true -mcast_addr <AS BELOW>  -bind_addr <LAN IP  address>
> Create one sender on 239.197.0.1
> Create one receiver on 239.198.0.1
> Create a second receiver on 239.199.0.1
> Send a message, as expected neither of the receivers observe the message.
> Create a third receiver on 239.197.0.1
> Send a message, all three senders now receive the message
> Is this the expected behaviour?

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