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https://issues.apache.org/jira/browse/OPENJPA-1372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Milosz Tylenda updated OPENJPA-1372:
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Attachment: TestSequenceGenerationOnMT.java
GeneratedIdObject.java
> Generating identifiers by using sequence table may fail during sequence table
> initialization
> --------------------------------------------------------------------------------------------
>
> Key: OPENJPA-1372
> URL: https://issues.apache.org/jira/browse/OPENJPA-1372
> Project: OpenJPA
> Issue Type: Bug
> Components: jdbc, kernel
> Affects Versions: 1.2.1, 2.0.0-M3
> Reporter: Milosz Tylenda
> Attachments: GeneratedIdObject.java, TestSequenceGenerationOnMT.java
>
>
> When sequence table does not exist and mutliple threads get EntityManagers
> from EntityManageFactory, an insert into sequence table may fail because of
> duplicate primary key value.
> EMF is created lazily by default and users reported various problems with
> concurrent initialization (e.g. failures in resolving aliases in JPQL
> queries, IIRC) of EMF. This issue might have the same roots.
> Issue and test case originally reported by Pinaki in OPENJPA-466.
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