Hey.

We had our tests with EJB3 in an mysql db and it worked fine, but we have to change db to Oracle now, and that caused alot of problems.
I hope someone can give me some pointers to what i am doing wrong, and what i am doing right, i have tried with transaktions, but without any effect.

The error i get is:

10:53:10,147 ERROR [STDERR] javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.HibernateException: this instance does not yet exist as a row in the database
10:53:10,147 ERROR [STDERR] at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69)
10:53:10,147 ERROR [STDERR] at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
10:53:10,147 ERROR [STDERR] at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
10:53:10,147 ERROR [STDERR] at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)

public CustomerBean addNewCustomerBean(ServiceProviderBean serviceProviderBean, CustomerBean customerBean) throws Exception {
System.out.println("1");
serviceProviderBean = em.find(ServiceProviderBean.class, serviceProviderBean.getId());
System.out.println("2");
serviceProviderBean.getCustomerBeans().add(customerBean);
System.out.println("3");
em.persist(customerBean);
System.out.println("4");
em.refresh(customerBean);
System.out.println("5");
em.merge(serviceProviderBean);
System.out.println("6");
return customerBean;
}

<xa-datasource>
<jndi-name>OracleDS</jndi-name>
<track-connection-by-tx/>
<isSameRM-override-value>false</isSameRM-override-value>
<xa-datasource-class>oracle.jdbc.xa.client.OracleXADataSource</xa-datasource-class>
<xa-datasource-property name="URL">jdbc:oracle:thin:@url ending (this is correct at my end)UK</xa-datasource-property>
<xa-datasource-property name="User">***Username***</xa-datasource-property>
<xa-datasource-property name="Password">***password***</xa-datasource-property>
<!-- Uses the pingDatabase method to check a connection is still valid before handing it out from the
pool -->
<valid-connection-checker-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleValidConnectionChecker</valid-connection-checker-class-name>
<!-- Checks the Oracle error codes and messages for fatal errors -->
<exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-class-name>
<!-- Oracles XA datasource cannot reuse a connection outside a transaction once enlisted in a global
transaction and vice-versa -->
<no-tx-separate-pools/>

<!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml -->
<metadata>
<type-mapping>Oracle9i</type-mapping>
</metadata>
<min-pool-size>1</min-pool-size>
<max-pool-size>10</max-pool-size>
<blocking-timeout-millis>5000</blocking-timeout-millis>
<idle-timeout-minutes>2</idle-timeout-minutes>
</xa-datasource>

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">

<persistence-unit name="forums" transaction-type="JTA">
<jta-data-source>java:/OracleDS</jta-data-source>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
</properties>
</persistence-unit>
</persistence>