Hi, I get the following error.

Hibernate version:
2.1.4
Mapping documents:

Code between sessionFactory.openSession() and session.close():

package test.hibclasses;

import net.sf.hibernate.*;
import net.sf.hibernate.cfg.Configuration;
import org.apache.log4j.Logger;
import javax.naming.*;

public class HibernateConnection {

static Logger log = Logger.getLogger(HibernateConnection.class.getName());

private static Configuration configuration;
private static SessionFactory sessionFactory;

static {
try {
configuration = new Configuration();
sessionFactory = configuration.configure().buildSessionFactory();
} catch (Throwable ex) {
log.error(ex);
throw new ExceptionInInitializerError(ex);
}
}
}

Name and version of the database you are using:
Oracle 10g and Sun Java System Application Server EE 8.1

Debug level Hibernate log excerpt:
Full stack trace of any exception that occurs:

[#|2005-04-29T18:16:46.073+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.core|_ThreadID=10;|Application server startup complete.|#]

[#|2005-04-29T18:17:03.274+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,264 INFO Environment:462 - Hibernate 2.1.4
|#]

[#|2005-04-29T18:17:03.297+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,294 INFO Environment:491 - hibernate.properties not found
|#]

[#|2005-04-29T18:17:03.300+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,298 WARN Environment:513 - could not copy system properties. System properties will be ignored.
|#]

[#|2005-04-29T18:17:03.305+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,303 INFO Environment:522 - using CGLIB reflection optimizer
|#]

[#|2005-04-29T18:17:03.314+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,312 INFO Configuration:872 - configuring from resource: /hibernate.cfg.xml
|#]

[#|2005-04-29T18:17:03.319+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,314 INFO Configuration:844 - Configuration resource: /hibernate.cfg.xml
|#]

[#|2005-04-29T18:17:03.468+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,466 INFO Configuration:328 - Mapping resource: test/pojos/Ars.hbm.xml
|#]

[#|2005-04-29T18:17:03.674+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,672 INFO Binder:229 - Mapping class: test.pojos.Ars -> ARS
|#]

[#|2005-04-29T18:17:03.876+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,874 INFO Configuration:328 - Mapping resource: test/pojos/ArsTe.hbm.xml
|#]

[#|2005-04-29T18:17:03.906+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,903 INFO Binder:229 - Mapping class: test.pojos.ArsTe -> ARS_TE
|#]

[#|2005-04-29T18:17:03.952+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,950 INFO Configuration:328 - Mapping resource: test/pojos/Bas.hbm.xml
|#]

[#|2005-04-29T18:17:03.988+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:03,986 INFO Binder:229 - Mapping class: test.pojos.Bas -> BAS
|#]

[#|2005-04-29T18:17:04.166+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:04,165 INFO Configuration:328 - Mapping resource: test/pojos/Is.hbm.xml
|#]

[#|2005-04-29T18:17:04.182+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:04,181 INFO Binder:229 - Mapping class: test.pojos.Is -> IS
|#]

[#|2005-04-29T18:17:04.341+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:04,339 INFO ReflectHelper:176 - reflection optimizer disabled for: test.pojos.Is, ExceptionInInitializerError: null
|#]

[#|2005-04-29T18:17:04.398+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.stream.out|_ThreadID=12;|18:17:04,384 ERROR HibernateConnection:20 - java.lang.NoClassDefFoundError
at net.sf.cglib.reflect.FastClassEmitter.<init>(FastClassEmitter.java:66)
at net.sf.cglib.reflect.FastClass$Generator.generateClass(FastClass.java:75)
at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:215)
at net.sf.cglib.reflect.FastClass$Generator.create(FastClass.java:67)
at net.sf.cglib.reflect.FastClass.create(FastClass.java:49)
at net.sf.cglib.reflect.FastClass.create(FastClass.java:42)
at net.sf.hibernate.type.ComponentType.<init>(ComponentType.java:113)
at net.sf.hibernate.cfg.Binder.bindComponent(Binder.java:899)
at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:281)
at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1243)
at net.sf.hibernate.cfg.Configuration.add(Configuration.java:249)
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:285)
at net.sf.hibernate.cfg.Configuration.addResource(Configuration.java:333)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:990)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:946)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:874)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:860)
at test.hibclasses.HibernateConnection.<clinit>(HibernateConnection.java:18)
at test.hibclasses.GH.webAuth(GH.java:1997)
at test.ejb.TestBean.webAuth(TestBean.java:308)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.enterprise.security.SecurityUtil$2.run(SecurityUtil.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.enterprise.security.application.EJBSecurityManager.doAsPrivileged(EJBSecurityManager.java:950)
at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:158)
at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:128)
at $Proxy17.webAuth(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:167)
at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(Unknown Source)
at test.ejb._Test_DynamicStub.webAuth(_Test_DynamicStub.java)
at org.apache.jsp.IULoginVf_jsp._jspService(IULoginVf_jsp.java:203)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:105)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:860)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:336)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:251)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:860)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:249)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:500)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:282)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:165)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:257)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:55)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:161)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:263)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:173)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:933)
at com.sun.enterprise.web.connector.httpservice.HttpServiceProcessor.process(HttpServiceProcessor.java:221)
at com.sun.enterprise.web.HttpServiceWebContainer.service(HttpServiceWebContainer.java:2072)
|#]

[#|2005-04-29T18:17:04.400+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.container.ejb|_ThreadID=12;|EJB5018: An exception was thrown during an ejb invocation on [TSSYYBean]|#]

[#|2005-04-29T18:17:04.401+0300|INFO|sun-appserver-ee8.1|javax.enterprise.system.container.ejb|_ThreadID=12;|
javax.ejb.EJBException
at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:2807)
at com.sun.ejb.containers.BaseContainer.checkExceptionNoTx(BaseContainer.java:2647)
at com.sun.ejb.containers.BaseContainer.checkExceptionBeanMgTx(BaseContainer.java:2585)
at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:2485)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:819)
at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:137)
at $Proxy17.webAuth(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:167)
at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(Unknown Source)
at test.ejb._Test_DynamicStub.webAuth(_Test_DynamicStub.java)
at org.apache.jsp.Login_jsp._jspService(Login_jsp.java:203)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:105)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:860)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:336)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:251)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:860)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:249)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:500)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:282)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:165)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:257)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:55)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:161)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:263)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:173)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:933)
at com.sun.enterprise.web.connector.httpservice.HttpServiceProcessor.process(HttpServiceProcessor.java:221)
at com.sun.enterprise.web.HttpServiceWebContainer.service(HttpServiceWebContainer.java:2072)
Caused by: java.lang.ExceptionInInitializerError
at test.hibclasses.HibernateConnection.<clinit>(HibernateConnection.java:21)
at test.hibclasses.GH.webAuth(GH.java:1997)
at test.ejb.TestBean.webAuth(TestBean.java:308)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.enterprise.security.SecurityUtil$2.run(SecurityUtil.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.enterprise.security.application.EJBSecurityManager.doAsPrivileged(EJBSecurityManager.java:950)
at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:158)
at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:128)
... 39 more
Caused by: java.lang.NoClassDefFoundError
at net.sf.cglib.reflect.FastClassEmitter.<init>(FastClassEmitter.java:66)
at net.sf.cglib.reflect.FastClass$Generator.generateClass(FastClass.java:75)
at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:215)
at net.sf.cglib.reflect.FastClass$Generator.create(FastClass.java:67)
at net.sf.cglib.reflect.FastClass.create(FastClass.java:49)
at net.sf.cglib.reflect.FastClass.create(FastClass.java:42)
at net.sf.hibernate.type.ComponentType.<init>(ComponentType.java:113)
at net.sf.hibernate.cfg.Binder.bindComponent(Binder.java:899)
at net.sf.hibernate.cfg.Binder.bindRootClass(Binder.java:281)
at net.sf.hibernate.cfg.Binder.bindRoot(Binder.java:1243)
at net.sf.hibernate.cfg.Configuration.add(Configuration.java:249)
at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:285)
at net.sf.hibernate.cfg.Configuration.addResource(Configuration.java:333)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:990)
at net.sf.hibernate.cfg.Configuration.doConfigure(Configuration.java:946)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:874)
at net.sf.hibernate.cfg.Configuration.configure(Configuration.java:860)
at test.hibclasses.HibernateConnection.<clinit>(HibernateConnection.java:34)
... 50 more
|#]

[#|2005-04-29T18:17:04.413+0300|SEVERE|sun-appserver-ee8.1|javax.enterprise.system.container.web|_ThreadID=12;|StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.RemoteException
at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.wrapException(Util.java:657)
at javax.rmi.CORBA.Util.wrapException(Util.java:277)
at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:177)
at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(Unknown Source)
at test.ejb._Test_DynamicStub.webAuth(_Test_DynamicStub.java)
at org.apache.jsp.Login_jsp._jspService(Login_jsp.java:203)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:105)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:860)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:336)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:251)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:860)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:249)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:500)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:282)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:165)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:257)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:55)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:161)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:263)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:173)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:933)
at com.sun.enterprise.web.connector.httpservice.HttpServiceProcessor.process(HttpServiceProcessor.java:221)
at com.sun.enterprise.web.HttpServiceWebContainer.service(HttpServiceWebContainer.java:2072)
Caused by: java.rmi.RemoteException
|#]


Any idea?
Thanks.