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EJB3 JPA error when migrating from JBoss version 4 to 5

· Java Zone

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 When I tried migrating my JBoss 4.2 [war] application which uses Spring to manage transactions, to JBoss 5.1, I got the following error message.

11:18:55,683 ERROR [AbstractKernelController] Error installing to Start: name=persistence.unit:unitName=#demo state=Create
java.lang.RuntimeException: Specification violation [EJB3 JPA 6.2.1.2] - You have not defined a jta-data-source for a JTA enabled persistence context named: demo
at org.jboss.jpa.deployment.PersistenceUnitInfoImpl.<init>(PersistenceUnitInfoImpl.java:115)
at org.jboss.jpa.deployment.PersistenceUnitDeployment.start(PersistenceUnitDeployment.java:275)

Here’s the persistence.xml file

<?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="demo">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>demo.jpa.User</class>
<class>demo.jpa.Issue</class>
<class>demo.jpa.UploadedFile</class>
<properties>
<property name="hibernate.hbm2ddl.auto" value="create" />
<property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.use_sql_comments" value="true" />
</properties>
</persistence-unit>
</persistence>

Solution/workaround

JBoss loads file named “persistence.xml” through this file:

  1. jboss-5.1.0.GA/server/default/deployers/ejb3.deployer/META-INF/jpa-deployers-jboss-beans.xml  

… via this code snippet (line 21-95)

   <bean name="PersistenceParsingDeployer" class="org.jboss.jpa.deployers.PersistenceParsingDeployer"/>
<bean name="PersistenceDeployer" class="org.jboss.jpa.deployers.PersistenceDeployer"/>

<bean name="PersistenceUnitDeployer" class="org.jboss.jpa.deployers.PersistenceUnitDeployer">
...
</bean>

Solution 1:

Comment out the above lines. This solution is a server configuration modification and therefore must be done on every server (dev/qa/production) that you want to run your app on. You may not be able to use this approach if you don’t have control over your [production] server configuration. See Solution 2 for an application oriented solution.

Solution 2:

  1. Rename the persistence.xml file to something else, for example, spring-persistence.xml
  2. Change the config for the spring entityManagerFactory bean to explicitly refer to this new file. See below

Spring configuration – before:

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
</bean>

Spring configuration – after:

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<!-- ADD THE FOLLOWING PROPERTY -->
<!-- provide the location of new persistence.xml -->
<property name="persistenceXmlLocation" value="classpath:META-INF/spring-persistence.xml" />
</bean>

Reference

See more details of the corresponding JIRA issue at jboss.org

From http://www.vineetmanohar.com/2010/04/06/ejb3-jpa-error-when-migrating-from-jboss-version-4-to-5/

The Java Zone is brought to you in partnership with ZeroTurnaround. Check out this 8-step guide to see how you can increase your productivity by skipping slow application redeploys and by implementing application profiling, as you code!

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