[jboss-jira] [JBoss JIRA] Resolved: (JGRP-265) Multiplexer: additional_data is dropped in MuxChannel

[Bela Ban (JIRA)]

     [ http://jira.jboss.com/jira/browse/JGRP-265?page=all ]

Bela Ban resolved JGRP-265.
---------------------------

    Resolution: Done

JChannel.down() now sets  additional_data in local_addr if local_addr is already set

> Multiplexer: additional_data is dropped in MuxChannel
> -----------------------------------------------------
>
>                 Key: JGRP-265
>                 URL: http://jira.jboss.com/jira/browse/JGRP-265
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 2.3, 2.3 SP1
>            Reporter: Bela Ban
>         Assigned To: Bela Ban
>             Fix For: 2.4
>
>
> HAPartition makes use of the "additional_data" feature to ensure the
> unique identity of each member of the partition.  This breaks with the
> MUX if the Channel is connected before HAPartition gets a chance to set
> the additional_data.
> This could be a general problem with additional_data -- one service
> using a shared channel wants to make use of additional_data, but the
> channel is already connected, so all the IpAddress objects in the views
> around the cluster won't have the additional_data.  This *may* not be a
> big deal, as logical addresses (JGRP-129) remove some of the need for
> additional data.  If people use additional_data for some other reason
> than logical addresses, then it may be an issue.
> For the HAPartition use case, I created a temporary workaround by
> creating an org.jboss.ha subclass of JChannelFactory, and having the
> subclass ensure the additional_data is set before handing out a channel.
> This ensures that no matter what service starts the underlying channel,
> the additional_data HAPartition wants will be there.  This will suffice
> until JGRP-129 is done, after which HAPartition won't need
> additional_data.

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