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https://issues.apache.org/jira/browse/AMQ-7015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16558411#comment-16558411
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Jeff Genender commented on AMQ-7015:
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The new code calls commit and rollback with 
28819aea4aa981d33c710d9d5e26f3cb6e03c1de calls commit and rollback, with the 
store command.  Is that disabled?  From the code paths, it looks like it does a 
full commit or rollback and isn't disabled.  I think what I am failing to 
understand is how that does not act nearly identically to the MBean?

> Startup performance improvement when log contains prepared transactions.
> ------------------------------------------------------------------------
>
>                 Key: AMQ-7015
>                 URL: https://issues.apache.org/jira/browse/AMQ-7015
>             Project: ActiveMQ
>          Issue Type: New Feature
>    Affects Versions: 5.15.4
>            Reporter: Heath Kesler
>            Assignee: Jeff Genender
>            Priority: Minor
>             Fix For: 5.16.0, 5.15.5
>
>
> I have a KahaDB that's performing a recovery on each startup.
> Digging deeper into it I've found that the issue is that the db.log contains 
> prepared transactions.
> The MessageDatabase will discard those entries in memory, however it does not 
> remove transaction info from those messages (I believe that's by design). So 
> on each restart, the broker will find those entries and again discard them in 
> memory.
> If I access the broker via JMX, I can go to the prepared XAs and execute a 
> clear on them one by one.
> When i restart my broker, i don't have a recovery attempted again.
> Performing a remove operation for each message can be very time consuming, so 
> i'd like to introduce an optional parameter to allow all prepared XAs to be 
> removed on recovery.
> Please see my forth coming patch with unit test.



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