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https://issues.apache.org/jira/browse/QPID-3625?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Weston M. Price updated QPID-3625:
----------------------------------

    Attachment: QPID3625-XASession.patch

Patch allowing for setting ackmode for XASessionImpl
                
> XASessionImpl Incorrectly sets Session acknowledge mode to AUTO_ACKNOWLEDGE 
> when it should be CLIENT_ACKNOWLEDGE
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: QPID-3625
>                 URL: https://issues.apache.org/jira/browse/QPID-3625
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Client
>    Affects Versions: 0.10, 0.12
>         Environment: All platforms
>            Reporter: Weston M. Price
>            Priority: Critical
>             Fix For: 0.15
>
>         Attachments: QPID-3625.patch, QPID3625-XASession.patch
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> When using distributed transactions (XA) message acknowledgement needs to 
> occur prior to the XA transaction being started in order to consistently 
> support the two phase commit protocol. In order for this to correctly occur, 
> the XASessionImpl, a non-transacted Session (i.e. non JMS transacted session) 
> should be configured to use CLIENT_ACKNOWLEDGE as this is the only mode that 
> supports explicit message acknowledgement which again, is required to 
> correctly participate in the distributed transaction.

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