Sorry, it was not a NPE, but it was the * java.lang.UnsupportedOperationException.* Somehow I wrote down the old exception. I changed the subject with the right exception. This exception only occurred in an inheritance strategy of TABLE_PER_CLASS.
The Collecitons.EMPTY_LIST.iterator() returns [EMAIL PROTECTED] 4781 emptest TRACE [main] openjpa.Runtime - An exception occurred while ending the transaction. This exception will be re-thrown. <0.0.0 nonfatal user error> *org.apache.openjpa.util.NoTransactionException*: Can only perform operation while a transaction is active. at org.apache.openjpa.kernel.BrokerImpl.assertActiveTransaction(* BrokerImpl.java:4307*) at org.apache.openjpa.kernel.BrokerImpl.afterCompletion(*BrokerImpl.java :1806*) at org.apache.openjpa.kernel.LocalManagedRuntime.rollback(* LocalManagedRuntime.java:123*) at org.apache.openjpa.kernel.LocalManagedRuntime.commit(* LocalManagedRuntime.java:104*) at org.apache.openjpa.kernel.BrokerImpl.commit(*BrokerImpl.java:1319*) at org.apache.openjpa.kernel.DelegatingBroker.commit(*DelegatingBroker.java :869*) at org.apache.openjpa.persistence.EntityManagerImpl.commit(* EntityManagerImpl.java:409*) at tutorial.ejb.TestEmpsPerClass.main(*TestEmpsPerClass.java:135*) 4781 emptest TRACE [main] openjpa.Runtime - An exception occurred while ending the transaction. This exception will be re-thrown. <0.0.0 nonfatal store error> *org.apache.openjpa.util.StoreException*: IteratorChains must contain at least one Iterator at org.apache.openjpa.kernel.BrokerImpl.afterCompletion(*BrokerImpl.java :1833*) at org.apache.openjpa.kernel.LocalManagedRuntime.commit(* LocalManagedRuntime.java:93*) at org.apache.openjpa.kernel.BrokerImpl.commit(*BrokerImpl.java:1319*) at org.apache.openjpa.kernel.DelegatingBroker.commit(*DelegatingBroker.java :869*) at org.apache.openjpa.persistence.EntityManagerImpl.commit(* EntityManagerImpl.java:409*) at tutorial.ejb.TestEmpsPerClass.main(*TestEmpsPerClass.java:135*) Caused by: *java.lang.UnsupportedOperationException*: IteratorChains must contain at least one Iterator at org.apache.commons.collections.iterators.IteratorChain.checkChainIntegrity(Unknown Source) at org.apache.commons.collections.iterators.IteratorChain.lockChain(Unknown Source) at org.apache.commons.collections.iterators.IteratorChain.hasNext(Unknown Source) at org.apache.openjpa.kernel.BrokerImpl.endTransaction(*BrokerImpl.java:2196 *) at org.apache.openjpa.kernel.BrokerImpl.afterCompletion(*BrokerImpl.java :1809*) ... 5 more <0.0.0 fatal store error> *org.apache.openjpa.persistence.RollbackException*: IteratorChains must contain at least one Iterator at org.apache.openjpa.persistence.EntityManagerImpl.commit(* EntityManagerImpl.java:420*) at tutorial.ejb.TestEmpsPerClass.main(*TestEmpsPerClass.java:135*) Caused by: <0.0.0 nonfatal general error> * org.apache.openjpa.persistence.PersistenceException*: IteratorChains must contain at least one Iterator at org.apache.openjpa.kernel.BrokerImpl.afterCompletion(*BrokerImpl.java :1833*) at org.apache.openjpa.kernel.LocalManagedRuntime.commit(* LocalManagedRuntime.java:93*) at org.apache.openjpa.kernel.BrokerImpl.commit(*BrokerImpl.java:1319*) at org.apache.openjpa.kernel.DelegatingBroker.commit(*DelegatingBroker.java :869*) at org.apache.openjpa.persistence.EntityManagerImpl.commit(* EntityManagerImpl.java:409*) ... 1 more Caused by: *java.lang.UnsupportedOperationException*: IteratorChains must contain at least one Iterator at org.apache.commons.collections.iterators.IteratorChain.checkChainIntegrity(Unknown Source) at org.apache.commons.collections.iterators.IteratorChain.lockChain(Unknown Source) at org.apache.commons.collections.iterators.IteratorChain.hasNext(Unknown Source)update different fields at org.apache.openjpa.kernel.BrokerImpl.endTransaction(*BrokerImpl.java:2196 *) at org.apache.openjpa.kernel.BrokerImpl.afterCompletion(*BrokerImpl.java :1809*) ... 5 more Teresa On 6/19/07, Patrick Linskey (JIRA) <[EMAIL PROTECTED]> wrote:
[ https://issues.apache.org/jira/browse/OPENJPA-261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12506312] Patrick Linskey commented on OPENJPA-261: ----------------------------------------- So you're saying that Collections.EMPTY_LIST.iterator() is returning null? That seems surprising. What version of Java are you using? Can you check if your Java version is returning null from Collecitons.EMPTY_LIST.iterator ()? > NullPointerException occurred in BrokerImpl.java > ------------------------------------------------ > > Key: OPENJPA-261 > URL: https://issues.apache.org/jira/browse/OPENJPA-261 > Project: OpenJPA > Issue Type: Bug > Components: kernel > Affects Versions: 0.9.7 > Environment: Window XP > Reporter: Teresa Kan > Priority: Critical > Attachments: NPE.patch > > > While I was testing against the openjpa code, I got a NPE in the BrokerImpl.endtransaction() method. The method set the transState to an empty Collection if there is no cache for transactions. Later the code did not check this Collection and tried to iterate on it and a NullPointerException occurred. > Original code: > Collection transStates = _transCache; > if (transStates == null) > transStates = Collections.EMPTY_LIST; > ..... > for (Iterator itr = transStates.iterator(); itr.hasNext();) { <--- NPE occurred here. > sm = (StateManagerImpl) itr.next(); > try { > if (rollback) { > // tell objects that may have been derefed then flushed > // (and therefore deleted) to un-deref > sm.setDereferencedDependent(false, false); > sm.rollback(); > } else > sm.commit(); > } catch (RuntimeException re) { > exceps = add(exceps, re); > } > } > I put a check before this "for" loop then the NPE disappeared. > if (!transStates.isEmpty()) { > for (Iterator itr = transStates.iterator(); itr.hasNext();) { > sm = (StateManagerImpl) itr.next(); > try { > if (rollback) { > // tell objects that may have been derefed then flushed > // (and therefore deleted) to un-deref > sm.setDereferencedDependent(false, false); > sm.rollback(); > } else > sm.commit(); > } catch (RuntimeException re) { > exceps = add(exceps, re); > } > } > } > The NPE.patch is attached in this jiar. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.
