Could not close a JDBC result set

[sherkan777]

Hi, when I test my app using jmeter. When I increase tests to over 50 concurent requests, my jboss serwer goes into never ending while throwing errrors like below.

I found this is very strange hibernate error, reported here:
http://opensource.atlassian.com/projects/hibernate/browse/HHH-3006

can anybody help me and tell, is that resolved?
I use Seam 2.1.1GA and jboss 4.2.1GA

2009-01-25 11:23:20,375 WARN  [org.hibernate.jdbc.AbstractBatcher]
Could not close a JDBC result set
java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextEntry(HashMap.java:841)
        at java.util.HashMap$KeyIterator.next(HashMap.java:877)
        at org.hibernate.jdbc.AbstractBatcher.closeStatements
(AbstractBatcher.java:314)
        at org.hibernate.jdbc.ConnectionManager.afterTransaction
(ConnectionManager.java:297)
        at org.hibernate.jdbc.JDBCContext.afterTransactionCompletion
(JDBCContext.java:221)
        at org.hibernate.transaction.CacheSynchronization.afterCompletion
(CacheSynchronization.java:85)
        at
com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.afterCompletion
(SynchronizationImple.java:136)
        at
com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.afterCompletion
(TwoPhaseCoordinator.java:340)
        at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end
(TwoPhaseCoordinator.java:93)
        at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:177)
        at
com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate
(TransactionImple.java:1382)
        at
com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit
(BaseTransaction.java:135)
        at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit
(BaseTransactionManagerDelegate.java:87)
        at org.jboss.tm.usertx.client.ServerVMClientUserTransaction.commit
(ServerVMClientUserTransaction.java:140)
        at org.jboss.seam.transaction.UTTransaction.commit(UTTransaction.java:
52)
        at org.jboss.seam.util.Work.workInTransaction(Work.java:58)
        at org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke
(TransactionInterceptor.java:89)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed
(SeamInvocationContext.java:68)
        at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke
(MethodContextInterceptor.java:44)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed
(SeamInvocationContext.java:68)
        at org.jboss.seam.async.AsynchronousInterceptor.aroundInvoke
(AsynchronousInterceptor.java:52)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed
(SeamInvocationContext.java:68)
        at org.jboss.seam.intercept.RootInterceptor.invoke
(RootInterceptor.java:107)
        at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation
(JavaBeanInterceptor.java:185)
        at org.jboss.seam.intercept.JavaBeanInterceptor.invoke
(JavaBeanInterceptor.java:103)
        at sun.reflect.GeneratedMethodAccessor875.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
        at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:
144)
        at org.jboss.seam.async.AsynchronousInvocation$1.process
(AsynchronousInvocation.java:62)
        at org.jboss.seam.async.Asynchronous$ContextualAsynchronousRequest.run
(Asynchronous.java:80)
        at org.jboss.seam.async.AsynchronousInvocation.execute
(AsynchronousInvocation.java:44)
        at org.jboss.seam.async