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From "Milosz Tylenda (JIRA)" <j...@apache.org>
Subject [jira] Updated: (OPENJPA-1372) Generating identifiers by using sequence table may fail during sequence table initialization
Date Sat, 31 Oct 2009 21:29:59 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-1372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Milosz Tylenda updated OPENJPA-1372:
------------------------------------

    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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