Question

I have a problem that has been using Hibernate 3.6.0 for a very long time (or versions around here). This project has been in development since 2009 and has slowly but surely upgraded Hibernate versions. It’s been using 3.6.x for some time.

I tried upgrading to 3.6.3 to see if it fixed the problem – it didn’t. My tests still run.

I just recently created an implementation for DefaultPreUpdateEventListener. It works great when I unit test it in IntelliJ. It works when I run the tests in Maven. However, when I run my application in Tomcat, I get this stupid classpath error:

Caused by: org.springframework.beans.factory.CannotLoadBeanClassException: Error loading class [trainingdividend.dao.UpdatedOnEventListener] for bean with name 'trainingdividend.dao.UpdatedOnEventListener#1342f5b' defined in file [C:\Users\egervari\IdeaProjects\trainingdividend-experiment\target\classes\applicationContext.xml]: problem with class file or dependent class; nested exception is java.lang.NoClassDefFoundError: org/hibernate/event/def/DefaultPreUpdateEventListener
    at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1253)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:433)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:270)
    ... 118 more
Caused by: java.lang.NoClassDefFoundError: org/hibernate/event/def/DefaultPreUpdateEventListener
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1026)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1483)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1361)
    at org.springframework.util.ClassUtils.forName(ClassUtils.java:257)
    at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:408)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1271)
    at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1242)
    ... 120 more
Caused by: java.lang.ClassNotFoundException: org.hibernate.event.def.DefaultPreUpdateEventListener
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1516)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1361)
    ... 136 more

This doesn’t really make sense. I have had no problems at all running Hibernate up to this point. None. Why is it that all of a sudden I am getting jar hell problems now for? I mean, this works in the unit/integration tests!

I really hate these kinds of problems. I’d appreciate it if someone could help. I’ve spent 2 hours trying to find out what is up, but I see no problem. My maven dependencies look good – it is only loading 1 version of Hibernate.

At times like this, I wish I was using Rails. I doubt they ever put up with this crap.

Here’s my spring configuration of Hibernate:

<bean id="sessionFactory"
      class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    <property name="eventListeners">
        <map>
            <entry key="pre-update">
                <bean class="trainingdividend.dao.UpdatedOnEventListener" />
            </entry>
        </map>
    </property>
    <property name="dataSource" ref="dataSource"/>
    <property name="mappingResources">
        <list>
            <value>hibernate/coursetemplate.hbm.xml</value>
            <value>hibernate/address.hbm.xml</value>
            <value>hibernate/user.hbm.xml</value>
            <value>hibernate/trainee.hbm.xml</value>
            <value>hibernate/company.hbm.xml</value>
            <value>hibernate/instructor.hbm.xml</value>
            <value>hibernate/module.hbm.xml</value>
            <value>hibernate/sysadmin.hbm.xml</value>
        </list>
    </property>
    <property name="namingStrategy">
        <bean class="org.hibernate.cfg.ImprovedNamingStrategy"/>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="javax.persistence.validation.mode">none</prop>

            <prop key="hibernate.dialect">${hibernate.dialect}</prop>
            <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}
            </prop>
            <prop key="hibernate.generate_statistics">false</prop>

            <prop key="hibernate.show_sql">false</prop>
            <prop key="hibernate.format_sql">true</prop>

            <prop key="hibernate.cache.use_second_level_cache">false</prop>
            <prop key="hibernate.cache.provider_class">
                org.hibernate.cache.EhCacheProvider
            </prop>
        </props>
    </property>
</bean>

Answer 1

check the jars are included in the class path. try putting jars in tomcat lib.

if u r using custom listeners have u tried adding the event listeners explicitly in the configuration?

<event type="load">
            <listener class="com.eg.MyLoadListener"/>
            <listener class="org.hibernate.event.def.DefaultLoadEventListener"/>
</event>

or u can implement org.hibernate.event.PreUpdateEventListener