[jboss-jira] [JBoss JIRA] (JGRP-1804) UDP: sending of multicasts fails after an ifdown / ifup cycle

[Bela Ban (JIRA)]

     [ https://issues.jboss.org/browse/JGRP-1804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bela Ban resolved JGRP-1804.
----------------------------

    Resolution: Done

    
> UDP: sending of multicasts fails after an ifdown / ifup cycle
> -------------------------------------------------------------
>
>                 Key: JGRP-1804
>                 URL: https://issues.jboss.org/browse/JGRP-1804
>             Project: JGroups
>          Issue Type: Bug
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 3.5
>
>
> After an ifdown / if up cycle, sending / receiving of multicast messages over mcast_sock fails with an IOException (no such device). Sending / receiving unicast datagram packets works.
> SOLUTION:
> Catch the IOException on the send/receive and set the interface again ({{MulticastSocket.setInterface()}}). This was confirmed to work.
> Perhaps count the number of failures and only reset the interface when the count exceeds a threshold

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