I'm using Spring Framework 3.1 with Hibernate 4.1 as a JPA provider, and I have a fully functional setup, but every time the web app is started I see this warning message:
14:28:12,725 WARN pool-2-thread-12 internal.EntityManagerFactoryRegistry:80 - HHH000436: Entity manager factory name (something) is already registered. If entity manager will be clustered or passivated, specify a unique value for property 'hibernate.ejb.entitymanager_factory_name'
The application functions just fine, but warning messages like that bother me, and hours of searching and tweaking and experimenting have lead me nowhere. I've tried changing the factory name and adding and omitting chunks of configuration, all to no avail. It appears that something in Spring or Hibernate is just initializing the entity manager factory twice.
FYI, I'm using the packagesToScan functionality of the LocalContainerEntityManagerFactoryBean to configure the entity manager without a persistence.xml file.
I've pared down my spring context XML to the following and the problem persists:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.nightsword.driverClassName}"/>
<property name="url" value="${jdbc.nightsword.url}"/>
<property name="username" value="${jdbc.nightsword.username}"/>
<property name="password" value="${jdbc.nightsword.password}"/>
</bean>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
</property>
<property name="dataSource" ref="dataSource"/>
<property name="packagesToScan" value="x.y"/>
</bean>
</beans>
For completeness, here's hibernate.properties:
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
hibernate.ejb.entitymanager_factory_name=something
And here's excerpted debug-level log output from both org.springframework.orm and org.hibernate. You can see how at 14:40:06,911 the EntityManagerFactory is registered from the first time, and immediately thereafter the LocalContainerEntityManagerFactoryBean appears to start all over from the beginning. Huh.
INFO: Deploying web application archive /opt/local/share/java/tomcat7/webapps/nightsword.war
14:40:06,149 INFO pool-2-thread-13 jpa.LocalContainerEntityManagerFactoryBean:264 - Building JPA container EntityManagerFactory for persistence unit 'default'
14:40:06,219 DEBUG pool-2-thread-13 type.BasicTypeRegistry:143 - Adding type registration boolean -> org.hibernate.type.BooleanType@4cb91eff
...
14:40:06,882 DEBUG pool-2-thread-13 internal.SessionFactoryRegistry:62 - Initializing SessionFactoryRegistry : org.hibernate.internal.SessionFactoryRegistry@161bb7fe
14:40:06,882 DEBUG pool-2-thread-13 internal.SessionFactoryRegistry:75 - Registering SessionFactory: a3219dd8-7d59-45ac-9a5a-0d13e38dbb04 (<unnamed>)
14:40:06,882 DEBUG pool-2-thread-13 internal.SessionFactoryRegistry:82 - Not binding SessionFactory to JNDI, no JNDI name configured
14:40:06,882 DEBUG pool-2-thread-13 internal.SessionFactoryImpl:487 - Instantiated session factory
14:40:06,882 DEBUG pool-2-thread-13 internal.SessionFactoryImpl:1119 - Checking 0 named HQL queries
14:40:06,883 DEBUG pool-2-thread-13 internal.SessionFactoryImpl:1142 - Checking 0 named SQL queries
14:40:06,887 DEBUG pool-2-thread-13 internal.StatisticsInitiator:110 - Statistics initialized [enabled=false]
14:40:06,910 DEBUG pool-2-thread-13 internal.EntityManagerFactoryRegistry:56 - Initializing EntityManagerFactoryRegistry : org.hibernate.ejb.internal.EntityManagerFactoryRegistry@75cc9008
14:40:06,911 DEBUG pool-2-thread-13 internal.EntityManagerFactoryRegistry:66 - Registering EntityManagerFactory: something
14:40:06,967 INFO pool-2-thread-13 jpa.LocalContainerEntityManagerFactoryBean:264 - Building JPA container EntityManagerFactory for persistence unit 'default'
14:40:06,967 DEBUG pool-2-thread-13 type.BasicTypeRegistry:143 - Adding type registration boolean -> org.hibernate.type.BooleanType@4cb91eff
...
14:40:07,128 DEBUG pool-2-thread-13 internal.SessionFactoryRegistry:75 - Registering SessionFactory: 81a9b5a6-83aa-46ee-be68-d642e6fda584 (<unnamed>)
14:40:07,128 DEBUG pool-2-thread-13 internal.SessionFactoryRegistry:82 - Not binding SessionFactory to JNDI, no JNDI name configured
14:40:07,129 DEBUG pool-2-thread-13 internal.SessionFactoryImpl:487 - Instantiated session factory
14:40:07,129 DEBUG pool-2-thread-13 internal.SessionFactoryImpl:1119 - Checking 0 named HQL queries
14:40:07,129 DEBUG pool-2-thread-13 internal.SessionFactoryImpl:1142 - Checking 0 named SQL queries
14:40:07,129 DEBUG pool-2-thread-13 internal.StatisticsInitiator:110 - Statistics initialized [enabled=false]
14:40:07,130 DEBUG pool-2-thread-13 internal.EntityManagerFactoryRegistry:66 - Registering EntityManagerFactory: something
14:40:07,130 WARN pool-2-thread-13 internal.EntityManagerFactoryRegistry:80 - HHH000436: Entity manager factory name (something) is already registered. If entity manager will be clustered or passivated, specify a unique value for property 'hibernate.ejb.entitymanager_factory_name'
How are you initializing your Spring Application Context? Are you using Spring MVC?
I've seen sometimes Spring MVC XML configurations importing the other app. context XML, causing instancing twice some beans because they are declared in the application context and the web application context.