[jboss-jira] [JBoss JIRA] Resolved: (JGRP-1289) TCP: multicasting should be restricted to current members

[Bela Ban (JIRA)]

     [ https://issues.jboss.org/browse/JGRP-1289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bela Ban resolved JGRP-1289.
----------------------------

    Resolution: Done


Fixed according to suggested solution

> TCP: multicasting should be restricted to current members
> ---------------------------------------------------------
>
>                 Key: JGRP-1289
>                 URL: https://issues.jboss.org/browse/JGRP-1289
>             Project: JGroups
>          Issue Type: Task
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 2.12
>
>
> In TP.down(), when TCP is used as transport, BasicTCP.sendMulticast() calls sendToAllPhysicalAddresses(). This method grabs all physical addresses from the cache and sends the message to each of them in turn.
> However, this is problematic in the following case:
> - {A,B,C}
> - C is stopped (CTRL-Z)
> - After some time, A installs view {A,B}
> - This marks C in the cache as 'removed', but the list of physical addresses is still {A,B,C}, so when we multicast to the group, we send to A, B *and* C !
> - The send to C will block at some point (as C is stopped), therefore the sending thread will block !
> - Even if we use send queues in TCP, after some time, the send queue of C will fill up and the addition to the queue will block
> SOLUTION: send a group multicast only to elements in the cache which are not marked as 'removable'.

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