[OPENJPA-2112] NPE during eager-fetching of simple m:n (ManyToMany) relation

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.1
• Component/s: jpa
• Labels: UnenhancedClasses collection eager fetching nullpointer project sample
• Assignee: Richard G. Curtis
• Reporter: Reiner Lott
• Created: 18/Jan/12 10:28
• Updated: 05/Jul/17 06:58
• Resolved: 18/Jan/12 15:46

Description

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" />