LocalContainerEntityManagerFactoryBean recursion->StackOverflowError

[martinahrer]

I have a working test for a Hibernate JPA based DAO running with LocalEntityManagerFactoryBean. The test is a JUnit test based on AbstractTransactionalDataSourceSpringContextTests.

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="org.hsqldb.jdbcDriver" />
        <property name="url" value="jdbc:hsqldb:mem:database" />
        <property name="username" value="sa" />
        <property name="password" value="" />
        <property name="defaultAutoCommit" value="false"></property>
    </bean>

    <!--bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
        <property name="persistenceUnitName" value="freelancer" />
        </bean-->

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="persistenceUnitName" value="freelancer" />
    </bean>

    <bean id="abstractDao" abstract="true">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

    <bean id="projectDao" parent="abstractDao" class="at.martinahrer.freelancer.dao.jpa.JpaProjectDao">
        <property name="implementationClass" value="at.martinahrer.freelancer.model.Project" />
    </bean>

    <bean id="activityDao" parent="abstractDao" class="at.martinahrer.freelancer.dao.jpa.JpaActivityDao">
        <property name="implementationClass" value="at.martinahrer.freelancer.model.Activity" />
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>
</beans>

As soon as I switch to the LocalContainerEntityManagerFactoryBean in order to explicitly set the dataSource the code starts a recursion and ends with a StackOverflowError!

Is there any parameter missing that configures the LocalContainerEntityManagerFactoryBean - I only aim at overriding the dataSource as specified in persistence.xml!

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [applicationContext-jpa.xml]: Invocation of init method failed; nested exception is java.lang.StackOverflowError
Caused by: java.lang.StackOverflowError
    at org.apache.xerces.util.URI.isConformantSchemeName(URI.java:1213)
    at org.apache.xerces.util.URI.setScheme(URI.java:904)
    at org.apache.xerces.util.URI.initializeScheme(URI.java:576)
    at org.apache.xerces.util.URI.initialize(URI.java:400)
    at org.apache.xerces.util.URI.<init>(URI.java:211)
    at org.apache.xerces.util.URI.<init>(URI.java:195)
    at org.apache.xerces.impl.XMLEntityManager.expandSystemId(XMLEntityManager.java:1140)
    at org.apache.xerces.impl.XMLEntityManager.resolveEntity(XMLEntityManager.java:581)
    at org.apache.xerces.impl.xs.XMLSchemaLoader.xsdToXMLInputSource(XMLSchemaLoader.java:625)
    at org.apache.xerces.impl.xs.XMLSchemaLoader.processJAXPSchemaSource(XMLSchemaLoader.java:580)
    at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(XMLSchemaLoader.java:489)
    at org.apache.xerces.impl.xs.XMLSchemaLoader.processJAXPSchemaSource(XMLSchemaLoader.java:588)
    at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(XMLSchemaLoader.java:489)
    at ....

[julien.dubois]

I am not sure it is mandatory, but I think you should inject the "jpaVendorAdapter" property into your "LocalContainerEntityManagerFactoryBean".

[martinahrer]

Julien, I have tried a vendor adapter with no improvement - looking at the JavaDoc and the source I don't think that it is related to that problem.

<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.Hibernat eJpaVendorAdapter">
<property name="database" value="HSQL" />
<property name="showSql" value="true" />
<property name="generateDdl" value="true" />
</bean>
</property>

The weird thing is that the recursion seems to occur when XmlSchemaLoader tries to load some XML ....

[julien.dubois]

Which version of Xerces are you using?

I've heard there were some significant bugs in older Xerces releases, and it's the component that causes the StackOverflowError...

[martinahrer]

Julien, you are just confirming what I was debugging now. In fact I had a xercesImpl-2.0.2. Upgrading to the latest version resolves this issue.

Thanks