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https://issues.apache.org/jira/browse/OPENJPA-295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12517291
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Michael Dick commented on OPENJPA-295:
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Getting back to Marc's comment. I think the difference in this case is that
WebSphere Application Server (and I'm guessing Geronimo) use the
TransactionSynchronizationRegistry.
When we use the TSR to get a TransactionManager it returns a
TransactionManagerFacade (a singleton), calling getTransaction() on the facade
returns a singleton (itself) as well. If I haven't misread the code, we'll hit
this problem fairly quickly with any Application Server that uses the TSR.
I can think of two potential fixes (assuming I've identified the problem
correctly) :
1. Use a concurrent set (similar to the patch I attached earlier).
2. The TSR API provides a getTransactionKey() method. The
TransactionManagerFacade could be modified to return a new "TransactionFacade"
Object when getTransaction is called. The TransactionFacade could use the
transactionKey's hashcode (which should be unique to each transaction), and
we'll avoid the collision.
Does anyone see a problem with either approach (or something I've missed) ?
> ArrayIndexOutofBoundsException when under load and within a managed
> Transaction
> -------------------------------------------------------------------------------
>
> Key: OPENJPA-295
> URL: https://issues.apache.org/jira/browse/OPENJPA-295
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa
> Affects Versions: 1.0.0
> Environment: openjpa running under WebSphere development builds, as
> well as Geronimo development builds
> Reporter: Rob Wisniewski
> Priority: Blocker
> Attachments: OPENJPA-295.diff.txt
>
>
> Recent development builds of our WAS products as well as the Geronimo project
> are seeing exceptions when running under load. An example of the exception
> is below:
> Caused by:
> java.lang.ArrayIndexOutOfBoundsException
> at java.util.ArrayList.add(ArrayList.java:378)
> at
> org.apache.openjpa.kernel.AbstractBrokerFactory.syncWithManagedTransaction(AbstractBrokerFactory.java:684)
> ... 39 more
> This is the deepest trace I can get with the actual exception, but the
> wrappering exception shows this stack trace for geronimo:
> <1.0.0-SNAPSHOT-SNAPSHOT nonfatal general error>
> org.apache.openjpa.persistence.PersistenceException: null
> at
> org.apache.openjpa.kernel.AbstractBrokerFactory.syncWithManagedTransaction(AbstractBrokerFactory.java:690)
> at org.apache.openjpa.kernel.BrokerImpl.initialize(BrokerImpl.java:304)
> at
> org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:182)
> at
> org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:142)
> at
> org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:190)
> at
> org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:55)
> at
> org.apache.geronimo.persistence.CMPEntityManagerTxScoped.createEntityManager(CMPEntityManagerTxScoped.java:74)
> at
> org.apache.geronimo.persistence.CMPEntityManagerTxScoped.getEntityManager(CMPEntityManagerTxScoped.java:55)
> at
> org.apache.geronimo.persistence.CMPEntityManagerTxScoped.createNamedQuery(CMPEntityManagerTxScoped.java:259)
> at
> org.apache.geronimo.samples.daytrader.ejb3.TradeSLSBBean.getClosedOrders(TradeSLSBBean.java:335)
> This is happening in two separate products with two different JTA
> implementations, and also both of these products were working at one point.
> Any ideas?
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