[jira] [Created] (OPENJPA-2328) NPE caused by one too many calls on the iterator inside the library.

["Guillaume Chauvet (JIRA)" <ji...@apache.org>]

Guillaume Chauvet created OPENJPA-2328:
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             Summary: NPE caused by one too many calls on the iterator inside the library.
                 Key: OPENJPA-2328
                 URL: https://issues.apache.org/jira/browse/OPENJPA-2328
             Project: OpenJPA
          Issue Type: Bug
          Components: jdbc
    Affects Versions: 2.2.1, 2.2.0, 2.1.1
            Reporter: Guillaume Chauvet
            Priority: Blocker


We have just discovered a critical bug in the library preventing our program from operating. The problem comes from an NPE generated when there is one too many calls on the iterator of a collection, causing this type of stack trace:

<openjpa-2.2.1-r422266:1396819 fatal store error> org.apache.openjpa.persistence.RollbackException: null
	at org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImpl.java:594)
	at com.qualiformed.qualinax.platform.dao.GenericDAO.update(GenericDAO.java:136)
	at com.qualiformed.qualinax.platform.dao.SettingDAO.persist(SettingDAO.java:54)
	at com.qualiformed.qualinax.application.QualinaxConfig.save(QualinaxConfig.java:509)
	at com.qualiformed.qualinax.application.model.LancerQualimagiQModel.supprimerSettingsQualimagiQ(LancerQualimagiQModel.java:103)
	at com.qualiformed.qualinax.application.controller.QualimagiqController.setupAnalysis(QualimagiqController.java:371)
	at com.qualiformed.qualinax.application.controller.QualimagiqProcessor$8$1.doInBackground(QualimagiqProcessor.java:449)
	at com.qualiformed.qualinax.application.controller.QualimagiqProcessor$8$1.doInBackground(QualimagiqProcessor.java:446)
	at javax.swing.SwingWorker$1.call(SwingWorker.java:277)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at javax.swing.SwingWorker.run(SwingWorker.java:316)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
Caused by: <openjpa-2.2.1-r422266:1396819 nonfatal general error> org.apache.openjpa.persistence.PersistenceException: null
	at org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:2000)
	at org.apache.openjpa.kernel.LocalManagedRuntime.commit(LocalManagedRuntime.java:81)
	at org.apache.openjpa.kernel.BrokerImpl.commit(BrokerImpl.java:1516)
	at org.apache.openjpa.kernel.DelegatingBroker.commit(DelegatingBroker.java:933)
	at org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImpl.java:570)
	... 14 more
Caused by: java.util.NoSuchElementException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:796)
	at java.util.HashMap$KeyIterator.next(HashMap.java:828)
	at org.apache.openjpa.jdbc.meta.strats.HandlerRelationMapTableFieldStrategy.update(HandlerRelationMapTableFieldStrategy.java:320)
	at org.apache.openjpa.jdbc.meta.FieldMapping.update(FieldMapping.java:699)
	at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.update(AbstractUpdateManager.java:343)
	at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.update(AbstractUpdateManager.java:370)
	at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.populateRowManager(AbstractUpdateManager.java:174)
	at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.flush(AbstractUpdateManager.java:97)
	at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.flush(AbstractUpdateManager.java:78)
	at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.flush(JDBCStoreManager.java:735)
	at org.apache.openjpa.kernel.DelegatingStoreManager.flush(DelegatingStoreManager.java:131)
	at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:2176)
	at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:2074)
	at org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:1992)
	... 18 more

We have created a patch to correct the problem, but I haven't had the time to create the unitary test to reproduce it.

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