I have a simple servlet which is throwing following exception on the server.
I have no idea why this is happening.
I have checked there is no private construtor/method in za.co.nationwide.model.MailingList.

Please can somebody pull me out.

Hibernate version: 3.1
MySQl v 5
Stack trace:
4748 ERROR [httpWorkerThread-8080-0] org.hibernate.proxy.BasicLazyInitializer - CGLIB Enhancement failed:
za.co.nationwide.model.MailingList
java.lang.ExceptionInInitializerError
at net.sf.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:167)
at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
at net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:145)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:117)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108)
at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:104)
at net.sf.cglib.proxy.Enhancer.<clinit>(Enhancer.java:69)
at org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:116)
at org.hibernate.proxy.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:41)
at org.hibernate.tuple.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:161)
at org.hibernate.tuple.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:131)
at org.hibernate.tuple.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:55)
at org.hibernate.tuple.TuplizerLookup.create(TuplizerLookup.java:64)
at org.hibernate.tuple.EntityMetamodel.<init>(EntityMetamodel.java:257)
at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:412)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:108)
at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:215)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1154)
at za.co.nationwide.model.HibernateUtil.<clinit>(HibernateUtil.java:24)
at za.co.nationwide.model.TestHibernateServlet.doGet(TestHibernateServlet.java:34)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:747)
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:585)
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:517)
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.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:362)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:210)
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:170)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:132)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:933)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:189)
at com.sun.enterprise.web.connector.grizzly.ProcessorTask.doProcess(ProcessorTask.java:604)
at com.sun.enterprise.web.connector.grizzly.ProcessorTask.process(ProcessorTask.java:475)
at com.sun.enterprise.web.connector.grizzly.ReadTask.executeProcessorTask(ReadTask.java:371)
at com.sun.enterprise.web.connector.grizzly.ReadTask.doTask(ReadTask.java:264)
at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:281)
at com.sun.enterprise.web.connector.grizzly.WorkerThread.run(WorkerThread.java:83)
Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission getProtectionDomain)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
at java.security.AccessController.checkPermission(AccessController.java:427)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.Class.getProtectionDomain(Class.java:2074)
at net.sf.cglib.core.ReflectUtils$1.run(ReflectUtils.java:42)
at java.security.AccessController.doPrivileged(Native Method)
at net.sf.cglib.core.ReflectUtils.<clinit>(ReflectUtils.java:40)
... 61 more
hbm file is as below
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!--
Mapping file autogenerated by MyEclipse - Hibernate Tools
-->
<hibernate-mapping>
<class name="za.co.nationwide.model.MailingList" table="mailing_list" catalog="nw_web">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="increment" />
</id>
<property name="shopper_title" type="java.lang.String">
<column name="shopper_title" />
</property>
<property name="shopper_first_name" type="java.lang.String">
<column name="shopper_first_name" />
</property>
<property name="shopper_surname" type="java.lang.String">
<column name="shopper_surname" />
</property>
<property name="shopper_city" type="java.lang.String">
<column name="shopper_city" />
</property>
<property name="shopper_country" type="java.lang.String">
<column name="shopper_country" />
</property>
<property name="shopper_telephone" type="java.lang.String">
<column name="shopper_telephone" />
</property>
<property name="shopper_mobile" type="java.lang.String">
<column name="shopper_mobile" />
</property>
<property name="shopper_email" type="java.lang.String">
<column name="shopper_email" />
</property>
<property name="shopper_agree" type="java.lang.String">
<column name="shopper_agree" />
</property>
<property name="shopper_profile_active" type="java.lang.String">
<column name="shopper_profile_active" />
</property>
</class>
</hibernate-mapping>

I have noticed that the above problem has something to do with the AccessControl.

Has somebody experienced similar problem?
Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission getProtectionDomain)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
at java.security.AccessController.checkPermission(AccessController.java:427)
...

Your problem might be related to classpath settings. If you're running inside an IDE (e.g. Eclipse), make sure all the 3rd party jar files are in the project classpath. If not, try moving some of the jarfiles into the jre/lib/ext/ directory of your jdk and see whether this solves your problem. It looks like dependent classes are loaded through different classloaders and hence not found or violate privileged access constraints. Debug/Step into this code in ReflectUtils.java and see what classloaders are involved:

line 39:

static {
PROTECTION_DOMAIN = (ProtectionDomain)AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
return ReflectUtils.class.getProtectionDomain();
}
});

You need to donwload and map the JDK sources for this, too. This is probably more of a Java ClassLoader issue than a hibernate issue.

http://cglib.sourceforge.net/howto.html
But I prefer to dissable SecurityManager and to delegate system resource protection for OS on servers, I think it is more secure and it is more performant. You need SecurityManager if you download and run untusted client code on server ( RMI stuff ).
See container documentation for more information.