Vineet Manohar is CTO / Co-Founder of online Car Search Engine, iSeeCars.com. Vineet is a DZone MVB and is not an employee of DZone and has posted 20 posts at DZone. You can read more from them at their website. View Full User Profile

EJB3 JPA error when migrating from JBoss version 4 to 5

04.07.2010
| 11667 views |
  • submit to reddit

 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>
<?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  
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>
<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>
<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/

Published at DZone with permission of Vineet Manohar, author and DZone MVB.

(Note: Opinions expressed in this article and its replies are the opinions of their respective authors and not those of DZone, Inc.)