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https://issues.apache.org/jira/browse/OPENJPA-2112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reiner Lott updated OPENJPA-2112:
---------------------------------
Attachment: Eager_Bug.zip
> NPE during eager-fetching of simple m:n (ManyToMany) relation
> -------------------------------------------------------------
>
> Key: OPENJPA-2112
> URL: https://issues.apache.org/jira/browse/OPENJPA-2112
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa
> Affects Versions: 2.1.1
> Reporter: Reiner Lott
> Labels: collection, eager, fetching, nullpointer, project, sample
> Attachments: Eager_Bug.zip
>
>
> Hi,
> in case of ManyToMany eager join unidirectional join, a nullpointer exception
> is thrown:
> Exception in thread "main" <openjpa-2.1.1-r422266:1148538 nonfatal general
> error> org.apache.openjpa.persistence.PersistenceException: null
> FailedObject: select t from Itemlist t [java.lang.String]
> at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:1008)
> at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:907)
> at
> org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:1041)
> at
> org.apache.openjpa.jdbc.sql.AbstractResult.load(AbstractResult.java:280)
> at
> org.apache.openjpa.jdbc.sql.SelectImpl$SelectResult.load(SelectImpl.java:2381)
> at
> org.apache.openjpa.jdbc.sql.AbstractResult.load(AbstractResult.java:274)
> at
> org.apache.openjpa.jdbc.kernel.InstanceResultObjectProvider.getResultObject(InstanceResultObjectProvider.java:59)
> at
> org.apache.openjpa.lib.rop.EagerResultList.<init>(EagerResultList.java:36)
> at org.apache.openjpa.kernel.QueryImpl.toResult(QueryImpl.java:1251)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:1007)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:863)
> at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:794)
> at
> org.apache.openjpa.kernel.DelegatingQuery.execute(DelegatingQuery.java:542)
> at org.apache.openjpa.persistence.QueryImpl.execute(QueryImpl.java:315)
> at
> org.apache.openjpa.persistence.QueryImpl.getResultList(QueryImpl.java:331)
> at de.meyerwerft.test.ItemTester.getItemlist_Items(ItemTester.java:102)
> at de.meyerwerft.test.ItemTester.main(ItemTester.java:19)
> Caused by: java.lang.NullPointerException
> at
> org.apache.openjpa.jdbc.kernel.JDBCStoreManager.setInverseRelation(JDBCStoreManager.java:480)
> at
> org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initializeState(JDBCStoreManager.java:440)
> at
> org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initialize(JDBCStoreManager.java:333)
> at
> org.apache.openjpa.kernel.DelegatingStoreManager.initialize(DelegatingStoreManager.java:112)
> at
> org.apache.openjpa.kernel.ROPStoreManager.initialize(ROPStoreManager.java:57)
> at org.apache.openjpa.kernel.BrokerImpl.initialize(BrokerImpl.java:1027)
> at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:985)
> ... 16 more
> Given relations:
> - Itemlist
> - Item
> - Itemlist_Item
> Properties set:
> <property name="openjpa.jdbc.SynchronizeMappings"
> value="buildSchema" />
> <property name="openjpa.RuntimeUnenhancedClasses"
> value="supported" />
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