Hi,

First of all, my apologies for my english.

There are some topics about this error, but I do not thing it is exactly the same. My error does not occur when I start my application but only after several hours of use.

At the beginning, the persistent class "com.apis.cz.donnees.mapping.SQLServer.Projet" works fine, but after some hours about 50% requests fail. After restarting tomcat, it works back.

This class has a no-argument public constructor, publics accessors and is used only for READ operations.

Evironment :

* Tomcat 5.5
* hibernate3.0 & cglib2.1.3 (in myWebApp/WEB-INF/lib)
* sql server 2000

Stack trace :

WARN 2008-04-30 11:00:07,441 org.hibernate.tuple.PojoEntityTuplizer - could not create proxy factory for:com.apis.cz.donnees.mapping.SQLServer.Projet
org.hibernate.HibernateException: CGLIB Enhancement failed: com.apis.cz.donnees.mapping.SQLServer.Projet
at org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:132)
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 com.apis.cz.donnees.dao.HibernateUtil.<clinit>(HibernateUtil.java:12)
at com.apis.cz.donnees.dao.DAO.getTypologie(DAO.java:43)
at com.apis.cz.outils.Typologie.recupererTypologie(Typologie.java:265)
at org.apache.jsp.search_jsp.creerListeTypologie(org.apache.jsp.search_jsp:968)
at org.apache.jsp.search_jsp._jspService(org.apache.jsp.search_jsp:2801)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:325)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:674)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:465)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:400)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:303)
at fr.w4.http.W4Servlet.service(Unknown Source)
at com.apis.cz.servlet.ServletWorkflow.service(ServletWorkflow.java:53)
at com.apis.cz.servlet.sgw.lucieweb.SGWWServlet.service(SGWWServlet.java:112)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:674)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:465)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:400)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:303)
at com.apis.cz.servlet.sgw.lucieweb.SGWWServlet.traiterAuthentifierLDAP(SGWWServlet.java:146)
at com.apis.cz.servlet.sgw.lucieweb.SGWWServlet.service(SGWWServlet.java:106)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:300)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:383)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:743)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:675)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:866)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError
at org.hibernate.proxy.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:116)
... 56 more


Regards.

No idea?....