我使用带有Hibernate 4.1的Spring Framework 3.1作为JPA提供程序,并且具有完整的功能设置,但是每次启动Web应用程序时,我都会看到以下警告消息:
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'
该应用程序正常运行,但是像这样的警告消息困扰着我,数小时的搜索,调整和试验使我无所适从。我试过更改工厂名称并添加和省略配置块,但无济于事。看来,Spring或Hibernate中的某些东西只是两次初始化了实体管理器工厂。
仅供参考,我正在使用LocalContainerEntityManagerFactoryBean的packagesToScan功能来配置实体管理器,而没有persistence.xml文件。
我已经将Spring上下文XML缩减为以下内容,问题仍然存在:
<?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>
为了完整起见,这里是hibernate.properties:
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect hibernate.ejb.entitymanager_factory_name=something
这是org.springframework.orm和org.hibernate的摘录调试级别日志输出。您可以看到如何在14:40:06,911首次注册EntityManagerFactory,然后此后立即出现,LocalContainerEntityManagerFactoryFactoryBean从头开始。嗯
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'
您如何初始化Spring Application Context?您正在使用Spring MVC吗?
我有时看到Spring MVC XML配置导入其他应用程序。上下文XML,导致将某些bean实例化两次,因为它们是在应用程序上下文和Web应用程序上下文中声明的。