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From "Gordon Sim (JIRA)" <qpid-...@incubator.apache.org>
Subject [jira] Resolved: (QPID-2278) Store recovery compatibility problem introduced by alternate-exchange fix
Date Wed, 16 Dec 2009 11:32:18 GMT

     [ https://issues.apache.org/jira/browse/QPID-2278?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Gordon Sim resolved QPID-2278.

    Resolution: Fixed

There was a another checkin (r.831082) that also added the alternate exchange to the queues
encoded information. A similar fix was made here as for the case of the exchange, namely the
extra data is encoded at the end and the decode checks for its availability before trying
to decode it. Further fix is in r891195.

> Store recovery compatibility problem introduced by alternate-exchange fix
> -------------------------------------------------------------------------
>                 Key: QPID-2278
>                 URL: https://issues.apache.org/jira/browse/QPID-2278
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>            Reporter: Kim van der Riet
>            Assignee: Kim van der Riet
> A recent checkin (r.831082) fixed a problem in which the exchange did not persist the
alternate-exchange setting, and on recovery this was being lost. To fix it, an additional
string was added to the Exchange::encode() and Exchange::decode() methods. However, this fix
means that there is a binary incompatibility between pre- and post-fix exchange data. Attempting
to recover stores from pre-fix brokers result in broker shutdown if recovery is attempted
using post-fix brokers.

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