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https://issues.apache.org/jira/browse/OPENJPA-1350?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rick Curtis closed OPENJPA-1350.
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> Race condition in the MetaDataRepository
> ----------------------------------------
>
> Key: OPENJPA-1350
> URL: https://issues.apache.org/jira/browse/OPENJPA-1350
> Project: OpenJPA
> Issue Type: Bug
> Components: kernel
> Affects Versions: 1.0.3, 1.2.1, 2.0.0-M3
> Reporter: Rick Curtis
> Assignee: Rick Curtis
> Fix For: 1.2.3, 2.0.0
>
> Attachments: OJ1350_1.0.x.patch, OPENJPA-1350-1.2.x.patch,
> OPENJPA-1350-1.2.x.patch
>
>
> There is a race condition in the MetaDataRepository where if multiple threads
> try to get MetaData for the same alias, one or more of the threads can get
> incorrect data. This can only occur on the first (few) thread(s). After init
> is complete, the problem does not occur.
> The error that is observed is the following:
> <openjpa-2.0.0-SNAPSHOT-r422266:824454M fatal user error>
> org.apache.openjpa.util.MetaDataException: Could not locate metadata for the
> class using alias "MdrTestEntity". Perhap
> s you meant MdrTestEntity, which is a close match. This could mean that you
> have mis-spelled the alias, or that OpenJPA failed to properly load the
> metadata for the type whose
> alias is "MdrTestEntity". Registered alias mappings: "{MdrTestEntity=[class
> org.apache.openjpa.persistence.meta.MdrTestEntity]}"
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