Spring+Hibernate can't create SessionFactory bean

[Alessio Demichelli]

Hello! i have a problem which upsets me... i can't sleep, really and need your help
i'm trying to launch my spring+hibernate application and get these exceptions:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataAccess' defined in URL [file:./Config/context.xml]: Cannot resolve reference to bean 'mySessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mySessionFactory' defined in URL [file:./Config/context.xml]: Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.hibernate.cfg.Configuration]: Constructor threw exception; nested exception is java.lang.ExceptionInInitializerError
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:275)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:104)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1245)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1010)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:472)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)
at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:140)
at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:84)
at lb7.Service.<init>(Service.java:21)
at lb7.ServiceTest.<init>(ServiceTest.java:20)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:171)
at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:216)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:213)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:73)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:46)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:180)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:41)
at org.junit.runners.ParentRunner$1.evaluate(ParentRunner.java:173)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.junit.runners.ParentRunner.run(ParentRunner.java:220)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mySessionFactory' defined in URL [file:./Config/context.xml]: Invocation of init method failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.hibernate.cfg.Configuration]: Constructor threw exception; nested exception is java.lang.ExceptionInInitializerError
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:269)
... 41 more
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.hibernate.cfg.Configuration]: Constructor threw exception; nested exception is java.lang.ExceptionInInitializerError
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:115)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:78)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newConfiguration(LocalSessionFactoryBean.java:772)
at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:517)
at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1369)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335)
... 51 more
Caused by: java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:330)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:296)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:300)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:100)
... 57 more
Caused by: java.lang.NullPointerException
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:167)
at org.hibernate.cfg.Environment.<clinit>(Environment.java:608)
... 65 more


google didn't solve my problem, although some people faced a similar one...
I can't understand, why "Could not instantiate bean class [org.hibernate.cfg.Configuration]"
Here is my configuration file:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
       	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">
<bean id="PropertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
       	 <property name="locations">
	          <list>
	       	       <value>/Config/jdbc.properties</value>
	          </list>
	        </property>
	</bean>
	<bean id="dataAccess" class="lb7.DatabaseAccess" >
		<property name="sessionFactory" ref="mySessionFactory" />
</bean>
	
<bean id="mySessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource" ref="myDataSource"/>
        <property name="mappingResources">
            <list>
	        <value>/Config/Client.hbm.xml</value>
        	        <value>/Config/Note.hbm.xml</value>
	        <value>/Config/Contact.hbm.xml</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">false</prop>
                <prop key="hibernate.bytecode.use_reflection_optimizer">true</prop>
  	  <prop key="hibernate.hbm2ddl.auto">update</prop>                
            </props>
        </property>
    </bean>
	<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
		<property name="driverClassName" value="${driverClassName}"/>
		<property name="url" value="${jdbc.url}"/>
		<property name="username" value="${jdbc.username}"/>
		<property name="password" value="${jdbc.password}"/>
	</bean>
    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" 
    	p:session-factory-ref="mySessionFactory" p:nested-transaction-allowed="true"/>
	<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
</beans>

and DAO object:

public class DatabaseAccess {
	
	private SessionFactory sessionFactory;

	public void setSessionFactory (SessionFactory sessionFactory) {
		this.sessionFactory = sessionFactory;
	}
              ...............
}

What should i do? i'm in despair... Help me please! Thank you!

[Mark Spritzler]

Here is your error

Caused by: java.lang.NullPointerException
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:167)

When reading exception stack traces that come from Spring Container, always scroll down to the bottom and find the root cause. If you try to read from the top you will get confused.

So Hibernate is trying to load a file getResourceAsStream() throwing a NullPointerException. Look at all the configuration pointing to config files or property files and make sure that those files are there, in that correct directory.

Now this is at runtime, so maybe those files exist in the file system, but they aren't being put into the classpath directory.

Mark

[Alessio Demichelli]

thank you for the answer, but all configuration files are in their places... i've added an empty "hibernate.properties" file and my exception was changed by another exception.. now it can't map my resources.. ok, thank you, i'll keep trying ;)

[Mark Spritzler]

You don't need the hibernate.properties file.

Your error is still not loading one of your external files.

Maybe

<property name="mappingResources">
<list>
<value>/Config/Client.hbm.xml</value>
<value>/Config/Note.hbm.xml</value>
<value>/Config/Contact.hbm.xml</value>
</list>
</property>


Do you need that "/" in front of Config? It should be relative to the classpath, which wouldn't require that "/"

Mark

[Alessio Demichelli]

thank you! the problem is solved