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https://issues.apache.org/jira/browse/JENA-1651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16721421#comment-16721421
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ASF subversion and git services commented on JENA-1651:
-------------------------------------------------------

Commit 124c7c631dd6b668b79d8628269aae8a56122b4b in jena's branch 
refs/heads/master from [[email protected]]
[ https://git-wip-us.apache.org/repos/asf?p=jena.git;h=124c7c6 ]

JENA-1651: Specific counter for tracking active transactions.

> Improve the TDB internal consistency checking for safe replay.
> --------------------------------------------------------------
>
>                 Key: JENA-1651
>                 URL: https://issues.apache.org/jira/browse/JENA-1651
>             Project: Apache Jena
>          Issue Type: Task
>            Reporter: Andy Seaborne
>            Assignee: Andy Seaborne
>            Priority: Minor
>
> {{TransactionManager.checkReplaySafe}} reads two AtomicLongs but updated to 
> these aren't coordinated so for a short time, they can be out of step. 
> Updates happen just outside the true transaction start-finish in 
> {{TSM_Counters}}.  
> There should be one atomic operation to note whether there are active 
> transaction or not.



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