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https://issues.apache.org/jira/browse/OPENJPA-334?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ekin Sokmen updated OPENJPA-334:
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Attachment: testcase_querycache.zip
Testcase demonstrating the QueryCache problem
> ManyToMany relationship not handled properly while using QueryCache .
> ---------------------------------------------------------------------
>
> Key: OPENJPA-334
> URL: https://issues.apache.org/jira/browse/OPENJPA-334
> Project: OpenJPA
> Issue Type: Bug
> Components: datacache
> Affects Versions: 1.0.0
> Environment: Fedora 6
> Java 1.5.0_11
> Reporter: Ekin Sokmen
> Attachments: testcase_querycache.zip
>
>
> Following description is a simplified model of the issue we are facing.
> Assume that we have 2 entities EntityA and EntityB in ManyToMany
> relationship. We are going to create a new instance of EntityA and add an
> existing instance of EntityB to it. We are creating a new POJO instance of
> EntityA and add an existing instance of EntityB to it. Then we persists the
> new instance of EntityA. Then we retrieve the instance of EntityA using
> OpenJPA and check the content of it. Without QueryCache this works well. But
> if the query cache is enabled the first time we get the instance of EntityA
> we get a properly populated EntityA instance but the second time we try to
> retrieve the same instance we get an empty set of included EntityB
> instance(s).
> The attached test case demonstrates this issue clearly.
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