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https://issues.apache.org/jira/browse/OFBIZ-2353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12790219#action_12790219
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Adrian Crum commented on OFBIZ-2353:
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In addition to the issue reported here, SequenceUtil will return duplicate IDs
in a heavily multi-threaded single instance. I confirmed this while testing my
multi-threaded demo data loading code. The synchronization used in the class is
not well thought out.
> SequenceUtil may generate duplicate IDs in Load Balancing mode
> ---------------------------------------------------------------
>
> Key: OFBIZ-2353
> URL: https://issues.apache.org/jira/browse/OFBIZ-2353
> Project: OFBiz
> Issue Type: Bug
> Components: framework
> Affects Versions: Release Branch 4.0, Release Branch 9.04, SVN trunk
> Reporter: Philippe Mouawad
> Priority: Critical
>
> If Ofbiz is deploy on 2 servers in Load Balancing Mode
> SequenceUtil will generate duplicate IDs because synchronization is done at
> JVM level instead of doing it in DB.
> A good replacement implementation would be:
> org.hibernate.id.enhanced.TableGenerator
> But it would involve a dependency on Hibernate
> Philippe
> www.ubik-ingenierie.com
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