Question

I have a test that runs perfectly when I use a MySQL Backend.

persistence.xml:

<persistence-unit name="pu">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:jboss/datasources/mysqlTM</jta-data-source>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
        <property name="hibernate.cache.use_second_level_cache" value="true" />

        <!-- Properties for Hibernate -->
        <property name="hibernate.hbm2ddl.auto" value="create-drop" />
        <property name="hibernate.show_sql" value="true" />
    </properties>
</persistence-unit>

However, when I switch to H2 as follows:

persistence.xml

    <persistence-unit name="pu">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:jboss/datasources/ExampleDS</jta-data-source>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/>
        <property name="hibernate.cache.use_second_level_cache" value="true" />

        <property name="hibernate.hbm2ddl.auto" value="create-drop" />
        <property name="hibernate.show_sql" value="true" />
    </properties>
</persistence-unit>

using the standard datasource as defined in the stock JBoss 7.1 install and I get the following exception:

Caused by: javax.persistence.TransactionRequiredException: JBAS011469: Transaction is required to perform this operation (either use a transaction or extended persistence context)

Google has been of little help. I would prefer to use H2 for testing merely to speed up the testing process.

Thanks in advance for any assistance,

Answer 1

Answering the question so it can be closed.

As it turns out, the error message with regards to transactions is a red-herring. The error was caused due to the different ways in which MySQL and H2 handle case sensitivity in queries.

Updating the queries to be case sensitive solved the issue.