Bc4j transaction problem

Question

In an application I have code that modifies a table.
In a client I have code that displays the table.
Periodically I get a Exception java.util.ConcurrentModificationException
What am I doing wrong?
If it is ok what should I do to recover??
In an application that executes periodically I have the following code.
void doError(ACUMesgMap mm) throws ACUException
try{
if ( errorVO == null )
errorVO = am.findViewObject("ViewErrorsForInst1");
// errorVO.setWhereClauseParam(0, new Integer((int)instance));
errorVO.setWhereClauseParam(0,new Integer ((int)instance));
errorVO.executeQuery();
while (errorVO.hasNext())
Row r = errorVO.next();
r.remove();
myTrans.commit();
java.util.Vector v = mm.getErrors();
Iterator e = v.iterator();
while (e.hasNext())
ACUMsgMapEntry me = (ACUMsgMapEntry)e.next();
ViewErrorsForInstRow r = (ViewErrorsForInstRow)errorVO.createRow();
r.setAcuinstanceRi(new Integer((int)instance));
r.setErrorCount(new Integer(me.errorCount));
String theException = me.e.toString();
if ( theException.length() > 250 ) theException = theException.substring(0,250);
r.setException(theException);
r.setMid(me.msgID);
r.setState(me.state);
r.setThreadNumber(new Integer(me.threadNumber));
long lt = me.time.getTime();
java.sql.Timestamp t = new java.sql.Timestamp(lt);
oracle.jbo.domain.Date date = new oracle.jbo.domain.Date(t);
r.setTheTime(date);
errorVO.insertRow(r);
myTrans.commit();
} catch (Exception e)
System.out.println(e);
ACUException ae = new ACUException(e);
ae.errorCode = 204;
ae.errorString = "Exception updating errors";
throw ae;
In client code I have the following that executes periodically.
private void jButton1_actionPerformed(ActionEvent e)
// Refresh Instance
oracle.jbo.ApplicationModule am = panelBinding.getApplicationModule();
oracle.jbo.ViewObject vo = am.findViewObject("ViewInstance1");
vo.executeQuery();

Answer 1

Sungim, sorry to contact you like this but i really need your help, i have seen that you have a big known about BCJ4 and OC4J...
And i was searching your e-mail but i did not find it,
My answer is:
I got an aplication that runs in a OC4J, that aplication works fine while the session is alive, when a time pass and the session die (I Think), the aplication don let me exit from any way!! and i need to use the magic Ctrl+Alt+Del!!
some part of my code:
=================
FILE ONE (ModuloHorarios):
public ApplicationModule mApp;
ApplicationModuleHome amHome = (ApplicationModuleHome)ctx.lookup(amDefName);
mApp = amHome.create();
FILE TWO:
public ApplicationModule mApp;
mMH = new ModuloHorarios(this,true);
//guarda la instancia de la aplizacion en mApp
setApp(mMH.getApp());
setApp(mMH.getApp());
The Source Code for the "EXIT" buttom:
=============================
if (mApp != null)
mApp.getTransaction().disconnect();
mApp.remove();
Configuration.releaseRootApplicationModule(mApp,true);
System.exit(0);
Thanks for any help!!!