[jira] Updated: (QPID-959) Protocol renegotiation does not occur on failover

["Marnie McCormack (JIRA)" <qp...@incubator.apache.org>]

     [ https://issues.apache.org/jira/browse/QPID-959?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marnie McCormack updated QPID-959:
----------------------------------

    Fix Version/s:     (was: M4)

Moving items not being worked on for M4 afaik out of scope

> Protocol renegotiation does not occur on failover
> -------------------------------------------------
>
>                 Key: QPID-959
>                 URL: https://issues.apache.org/jira/browse/QPID-959
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Client
>    Affects Versions: M3
>            Reporter: Aidan Skinner
>            Assignee: Aidan Skinner
>
> The current failover mechanism does not fully take account of the fact that a session may change protocol versions when failover occurs. Consider:
> Broker A is a 0-10 broker
> Broker B is a 0-9 broker
> Client C is a 0-8, 0-9 and 0-10 capable client
> 1. C connects to A, with B configured as as it's second broker, with round robin failover. It negotiates to use 0-10 and begins messaging. 
> 2. Broker A fails and C connects to Broker B. It should renegotiate the protocol and start talking AMQP 0-9. Messaging should continue as transparently as possible. 
> 3. Broker B fails and C connects to Broker A. It should renegotiate the protocol and resume talking AMQP 0-10, messaging should continue.
> Currently step 2 will fail

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