Liberino Covelli [https://community.jboss.org/people/rino.covelli] created the discussion "JBoss problem class not found" To view the discussion, visit: https://community.jboss.org/message/754555#754555 -------------------------------------------------------------- dear friends, I' m developing the my firts enterpise application (with eclipse Indigo and Jboss 7.1 ) in wich i added a ejb module and a web module, now i put the file persistance.xml <?xml version="1.0" encoding="UTF-8"?> <persistence> <persistence-unit name="jpa3">     <provider>org.hibernate.ejb.HibernatePersistence</provider>         <class>pojo.Accordo</class>     <class>pojo.Azienda</class>     <class>pojo.Categoria</class>     <class>pojo.Cliente</class>     <class>pojo.Ingrediente</class>     <class>pojo.ItemOrdinazione</class>     <class>pojo.MenuFisso</class>     <class>pojo.Pietanza</class>     <class>pojo.Prenotazione</class>     <class>pojo.Privato</class>          <exclude-unlisted-classes>false</exclude-unlisted-classes>                 <properties>             <!--         <property name="hibernate.connection.url" value="jdbc:mysql://192.168.10.146:3306/jpaExamples"/>         <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>         <property name="hibernate.connection.password" value="root"/>         <property name="hibernate.connection.username" value="root"/>                 <property name="hibernate.show_sql" value="true"/>         <property name="hibernate.format_sql" value="true"/>         -->                <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>         <property name="hibernate.connection.url" value="jdbc:postgresql://localhost/DBRistorante"/>         <property name="hibernate.connection.username" value="postgres"/>         <property name="hibernate.connection.password" value="test"/>           <property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>         <property name="hibernate.show_sql" value="true"/>            <property name="hibernate.hbm2ddl.auto" value="create-drop"/>             </properties>             inside the folder META-INF in the ejb module ,but when deploy my appplication i get this error Caused by: org.hibernate.HibernateException: Specified JDBC Driver org.postgresql.Driver class not found -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/754555#754555] Start a new discussion in Beginner's Corner at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]