RE: [eclipselink-users] ConcurrentModificationException

["Sebastien Tardif" <stardif@xxxxxxxxxxxx>]

Please create an automated test case failing and attach to a bug. 

You could reuse some of the setup for your test from existing automated
test case like the one provided on
https://bugs.eclipse.org/bugs/show_bug.cgi?id=270762 

-----Original Message-----
From: eclipselink-users-bounces@xxxxxxxxxxx
[mailto:eclipselink-users-bounces@xxxxxxxxxxx] On Behalf Of cmathrusse
Sent: Thursday, September 03, 2009 3:06 PM
To: eclipselink-users@xxxxxxxxxxx
Subject: [eclipselink-users] ConcurrentModificationException


I'm using EclipseLink 1.1.2 (just upgraded from 1.1.1 which I also had
the
same issue with)

I have an OrderProcess entity that contains a list of Addresses. It is a
one
sided relationship. 
public class OrderProcess {
  @OneToMany
  @JoinTable(
      name = "ORDER_PROCESS_ADDRESS", 
      joinColumns = @JoinColumn(name = "ORDER_PROCESS_ID"), 
      inverseJoinColumns = @JoinColumn(name = "ADDRESS_ID"))  
  private List<Address> addresses;
....
}

I'm attempting to update the address list on the OrderProcess. I don't
want
to retain any relationships that currently exist. So I'm attempting to
simply replace the existing Address list with a new one. Something like
the
following.

  java.util.List<Address> orderAddresses = new
java.util.ArrayList<Address>();
  
  for(Address address : externalAddresses) {     
    // Get a reference to the entity
    address = addressFacade.findExisting(address.getExternalId(),
address.getNameType(), address.getOrganization(),
process.getSourceRecordDate());
    
    if(!orderAddresses.contains(address)) {
      orderAddresses.add(address);
    }
  }

  
  // assign the addresses to the process
  process.setAddresses(orderAddresses);

  process.setModDate(Calendar.getUTCInstance());
  Process updated = em.merge(process);        
  em.flush();

The above code executes successfully except when there are existing
Addresses associated to the OrderProcess. When the call to flush() gets
executed I get the following exception:

javax.ejb.TransactionRolledbackLocalException: Exception thrown from
bean;
nested exception is: java.util.ConcurrentModificationException
java.util.ConcurrentModificationException
        at
java.util.IdentityHashMap$IdentityHashMapIterator.nextIndex(IdentityHash
Map.java:715)
        at
java.util.IdentityHashMap$KeyIterator.next(IdentityHashMap.java:804)
        at
org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.calculateChange
s(UnitOfWorkImpl.java:567)
        at
org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.writ
eChanges(RepeatableWriteUnitOfWork.java:308)
        at
org.eclipse.persistence.internal.jpa.EntityManagerImpl.flush(EntityManag
erImpl.java:527)
        at
com.sun.enterprise.util.EntityManagerWrapper.flush(EntityManagerWrapper.
java:331)

If I delete the associated Addresses from the ORDER_PROCESS_ADDRESS
table
and reprocess the OrderProcess then everything functions as expected
without
any Exception. 

So it seems to me that I am incorrectly assigning the Addresses. Do I
need
to remove them prior to the assignment? Or is there another way that I
need
to perform the assignment?

Thanks for the help..
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