I am trying to initialize hibernate from a startup servlet within Tomcat. The following line of code
QUERY_KEY_FACTORY = (QueryCacheKeyFactory) KeyFactory.create(QueryCacheKeyFactory.class);

in
package net.sf.hibernate.impl.SessionFactoryImpl

semms to be called twice after
sessionFactory = new Configuration().configure().buildSessionFactory();

The first time it executes fine, the next time it blows up on finding the KeyFactory and I get a java.lang.NoClassDefFoundError

I am using Eclipse to attach a debugger to tomcat, and have downlowded the cglib src jar. I can step into the jar the first time it is called, but not the second.

I have checked the required libraries in the readme.txt file and I have all the required, and some of the optional that I was not sure about.

I am stuck any help would be greatly appreciated.

Thanks,
Chad

Hibernate version:
2.1.6

Code between sessionFactory.openSession() and session.close():
try {
// Create the SessionFactory
sessionFactory = new Configuration().configure().buildSessionFactory();
} catch (HibernateException ex) {
sessionFactory = new Configuration().configure().buildSessionFactory();
} catch (HibernateException ex) {

Full stack trace of any exception that occurs:
java.lang.RuntimeException: Configuration problem: null
at gov.fbi.vicap.dal.HibernateSessionManager.<init>(HibernateSessionManager.java:34)
at gov.fbi.vicap.init.VicapFactoryInit.init(VicapFactoryInit.java:12)
at javax.servlet.GenericServlet.init(GenericServlet.java:211)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1029)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4013)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4357)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:789)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478)
at org.apache.catalina.core.StandardService.start(StandardService.java:480)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
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.startup.Bootstrap.start(Bootstrap.java:287)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
Caused by: java.lang.NoClassDefFoundError
at net.sf.hibernate.impl.SessionFactoryImpl.<clinit>(SessionFactoryImpl.java:236)
at net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:791)
at gov.fbi.vicap.dal.HibernateSessionManager.<init>(HibernateSessionManager.java:25)
... 19 more

2004-12-17 11:44:46 StandardContext[/balancer]org.apache.webapp.balancer.BalancerFilter: init(): ruleChain: [org.apache.webapp.balancer.RuleChain: [org.apache.webapp.balancer.rules.URLStringMatchRule: Target string: News / Redirect URL: http://www.cnn.com], [org.apache.webapp.balancer.rules.RequestParameterRule: Target param name: paramName / Target param value: paramValue / Redirect URL: http://www.yahoo.com], [org.apache.webapp.balancer.rules.AcceptEverythingRule: Redirect URL: http://jakarta.apache.org]]

Name and version of the database you are using:
Oracle 9.i

Hi

SessionFactory configuration requires once when you startup your application. I'm sure you call only once. With Tomcat, you can put that config() in application scope.

I had the same problem--fist call's Ok, second call failed--. The way I fixed was every time after transaction tx.commit() or tx.rollback(), make sure that you call current seesion.close().

Here is the wrapper class for transaction control
...

private static SessionFactory sessionFactory = null;
private static final ThreadLocal threadSession = new ThreadLocal();
private static final ThreadLocal threadTransaction = new ThreadLocal();

....init()
{
...
sessionFactory =
new Configuration()
.addClass(***.class)
....... add more classes
..............
.setProperties(System.getProperties())
.buildSessionFactory();


public static void closeSession() {
try {
Session s = (Session) threadSession.get();
threadSession.set(null);
if (s != null && s.isOpen()) {

s.close();
}
}
catch (HibernateException ex) {
new HibernateException(ex);
}
}

public static void beginTransaction() {
Transaction tx = (Transaction) threadTransaction.get();

try {
if (tx == null) {
tx = getSession().beginTransaction();
}
threadTransaction.set(tx);
}
catch (HibernateException ex) {
new HibernateException(ex);
}
}

public static void commitTransaction() {
Transaction tx = (Transaction) threadTransaction.get();
try {
if (tx != null && !tx.wasCommitted() && !tx.wasRolledBack()) {
tx.commit();
}
threadTransaction.set(null);
}
catch (HibernateException ex) {
rollbackTransaction();
new HibernateException(ex);
}
}

public static void rollbackTransaction() {
Transaction tx = (Transaction) threadTransaction.get();

try {
threadTransaction.set(null);
if (tx != null && !tx.wasCommitted() && !tx.wasRolledBack()) {
tx.rollback();
}
}
catch (HibernateException ex) {
new HibernateException(ex);
}
finally {
closeSession();
}
}

}

Regards,

sithu

I finally found it....

The issue has to do with which jar that is used for cglib. If I had
cglib-2.0.jar
it blew up every time.

Although, if I used the jar that was distributed with hibernate
cglib-full-2.0.2.jar
it works like a charm.

Hope this helps someone else.

Thanks,
Chad

Hi chadmuco

your hint did help me, thank you very much!

Andy