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https://issues.apache.org/jira/browse/CASSANDRA-559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12778846#action_12778846
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Jaakko Laine commented on CASSANDRA-559:
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I suppose this is because Header in 0.4 uses EndPoint while 0.5 uses
InetAddress. EndPoint is basically String host + int port, so writing some
kludgish stuff to build 0.5 Header from serialized 0.4 Header and vice versa
would not be very difficult. Don't know if this is worth the trouble though, as
we're anyway going to lose port number when building 0.4 Header from 0.5 Header.
> Allow 0.5 node to participate in 0.4 gossip ring
> ------------------------------------------------
>
> Key: CASSANDRA-559
> URL: https://issues.apache.org/jira/browse/CASSANDRA-559
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Jonathan Ellis
> Assignee: Jonathan Ellis
> Priority: Minor
> Fix For: 0.5
>
> Attachments: 559.patch
>
>
> this would allow incremental upgrading of 0.4 cluster to 0.5 instead of
> having to shut down, upgrade, restart all.
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