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https://issues.apache.org/jira/browse/OFBIZ-3557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13040259#comment-13040259
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Jacopo Cappellato commented on OFBIZ-3557:
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Bilgin,
yes you are right... copy and paste error.
I just wanted to illustrate a situation where a gap in the sequence is
generated: invoice B could fail for another reason. All I wanted to show is
that use case #2 could lead to gaps.
Thanks for the detailed review.
Jacopo
> Enforced sequence does not work with concurrent access
> ------------------------------------------------------
>
> Key: OFBIZ-3557
> URL: https://issues.apache.org/jira/browse/OFBIZ-3557
> Project: OFBiz
> Issue Type: Bug
> Components: framework
> Affects Versions: Release Branch 09.04, SVN trunk
> Reporter: Wickersheimer Jeremy
> Attachments: OFBIZ-3557-1.patch, OFBIZ-3557-2.patch
>
>
> There is a fundamental issue with enforced sequences (for orders, invoices,
> etc ..) and concurrency.
> For example if two users are creating an order at the same time one of them
> will see the creation fail with a PK error. The problem is that the
> "getNextXXXId" rely on the party accounting preference entity, but there is
> absolutely no guarantee that the last number in the sequence gets updated
> before another service can read it.
> This is at best very annoying when used only internally but may be
> unpractical for e-commerce sites.
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