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https://issues.apache.org/jira/browse/OPENJPA-536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Amy Yang updated OPENJPA-536:
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Description:
There are 3 classes: Item, Artist and Person. Artist extends Person.
Invoking JPAFacadeHelper.getMetaData(emf, Item.class) will cause
OutOfMemoryError thrown by
org.apache.openjpa.meta.MetaDataRepository.processBuffer().
was:
Comparison of such classes will return a incorrect result: Item, Artist and
Person. Artist extends Person. The comparator will report:
Item < Person
Person < Artist
Artist < Item
It will cause OutOfMemoryError thrown by
org.apache.openjpa.meta.MetaDataRepository.processBuffer().
Summary: getMetaData() causes OutOfMemoryError under some cases (was:
InheritanceComparator does not work under some cases)
It is because when constructing the TreeSet, the Item will be the root. The
handling order will be Item, Person, Artist.
The the comparator will report Artist < Item and Person > Item. So the TreeSet
will be
Item
/ \
Artist Person
Then when traversing the TreeSet and pop the first one, after Item is removed,
the TreeSet will be
Person
/
Artist
The comparator will report Person < Artist so the TreeSet is incorrect.
> getMetaData() causes OutOfMemoryError under some cases
> ------------------------------------------------------
>
> Key: OPENJPA-536
> URL: https://issues.apache.org/jira/browse/OPENJPA-536
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa
> Affects Versions: 1.0.2, 1.0.3
> Environment: Sun JDK 5
> Reporter: Amy Yang
> Priority: Blocker
>
> There are 3 classes: Item, Artist and Person. Artist extends Person.
> Invoking JPAFacadeHelper.getMetaData(emf, Item.class) will cause
> OutOfMemoryError thrown by
> org.apache.openjpa.meta.MetaDataRepository.processBuffer().
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