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From "Gary Tully (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (AMQ-2594) Make JDBC store resilient on broker sequence id order
Date Sun, 07 Mar 2010 22:07:45 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-2594?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gary Tully reassigned AMQ-2594:
-------------------------------

    Assignee: Dejan Bosanac  (was: Gary Tully)

Dejan, as I will be away for the next week and a bit, I am giving this back to you, there
is a new test case and some additions to your original work, but there is still some detail
to be finalized. 
In particular, I think that we may want to have addMessage deal with incrementing and assigning
a brokerSequenceId when the message is persisted (transaction actually committed), a change
which will effect all stores.
Will chat during the week at some stage. thanks.

> Make JDBC store resilient on broker sequence id order
> -----------------------------------------------------
>
>                 Key: AMQ-2594
>                 URL: https://issues.apache.org/activemq/browse/AMQ-2594
>             Project: ActiveMQ
>          Issue Type: Improvement
>    Affects Versions: 5.3.0
>            Reporter: Dejan Bosanac
>            Assignee: Dejan Bosanac
>             Fix For: 5.3.1, 5.4.0
>
>         Attachments: AMQ-2594.work-in-progress.patch
>
>
> Currently if the message is sent in a transaction, there's a chance that messages are
added to the cursor out of order (regarding broker seq id). The problem with JDBC store is
that it does message recovery based on this seq id, which can lead to all kind of problems
(such as orphaned messages in the database).
> The solution is to refactor JDBC store to use its own seq generator for recovering purposes
and replace broker seq id, with message id for all other operations

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