java - Getting error during SessionFactory creation -

i keep getting failed.org.hibernate.hibernateexception when want run hibernate code. i'm using spring 3 mvc , spring 3 security in app. idea can cause this?

hibernate part of pom.xml:

<!-- hibernate + mysql -->     <dependency>         <groupid>mysql</groupid>         <artifactid>mysql-connector-java</artifactid>         <version>5.1.9</version>     </dependency>      <dependency>         <groupid>org.hibernate</groupid>         <artifactid>hibernate-core</artifactid>         <version>3.6.3.final</version>     </dependency>      <dependency>         <groupid>javassist</groupid>         <artifactid>javassist</artifactid>         <version>3.12.1.ga</version>     </dependency>     <dependency>         <groupid>asm</groupid>         <artifactid>asm-all</artifactid>         <version>2.2</version>     </dependency>     <dependency>         <groupid>antlr</groupid>         <artifactid>antlr</artifactid>         <version>2.7.7</version>     </dependency> 

the stack trace:

initial sessionfactory creation failed.org.hibernate.hibernateexception: unable instantiate default tuplizer [org.hibernate.tuple.entity.pojoentitytuplizer] v 02, 2013 10:18:28 odp. org.apache.catalina.core.standardwrappervalve invoke severe: servlet.service() servlet [mvc-dispatcher] in context path [/fit] threw exception [handler processing failed; nested exception java.lang.exceptionininitializererror] root cause java.lang.classnotfoundexception: javassist.util.proxy.methodfilter     @ org.apache.catalina.loader.webappclassloader.loadclass(webappclassloader.java:1711)     @ org.apache.catalina.loader.webappclassloader.loadclass(webappclassloader.java:1556)     @ org.hibernate.bytecode.javassist.bytecodeproviderimpl.getproxyfactoryfactory(bytecodeproviderimpl.java:49)     @ org.hibernate.tuple.entity.pojoentitytuplizer.buildproxyfactoryinternal(pojoentitytuplizer.java:205)     @ org.hibernate.tuple.entity.pojoentitytuplizer.buildproxyfactory(pojoentitytuplizer.java:183)     @ org.hibernate.tuple.entity.abstractentitytuplizer.<init>(abstractentitytuplizer.java:167)     @ org.hibernate.tuple.entity.pojoentitytuplizer.<init>(pojoentitytuplizer.java:77)     @ sun.reflect.nativeconstructoraccessorimpl.newinstance0(native method)     @ sun.reflect.nativeconstructoraccessorimpl.newinstance(nativeconstructoraccessorimpl.java:57)     @ sun.reflect.delegatingconstructoraccessorimpl.newinstance(delegatingconstructoraccessorimpl.java:45)     @ java.lang.reflect.constructor.newinstance(constructor.java:525)     @ org.hibernate.tuple.entity.entitytuplizerfactory.constructtuplizer(entitytuplizerfactory.java:105)     @ org.hibernate.tuple.entity.entitytuplizerfactory.constructdefaulttuplizer(entitytuplizerfactory.java:133)     @ org.hibernate.tuple.entity.entityentitymodetotuplizermapping.<init>(entityentitymodetotuplizermapping.java:80)     @ org.hibernate.tuple.entity.entitymetamodel.<init>(entitymetamodel.java:322)     @ org.hibernate.persister.entity.abstractentitypersister.<init>(abstractentitypersister.java:485)     @ org.hibernate.persister.entity.singletableentitypersister.<init>(singletableentitypersister.java:133)     @ org.hibernate.persister.persisterfactory.createclasspersister(persisterfactory.java:84)     @ org.hibernate.impl.sessionfactoryimpl.<init>(sessionfactoryimpl.java:286)     @ org.hibernate.cfg.configuration.buildsessionfactory(configuration.java:1845)     @ util.hibernateutil.buildsessionfactory(hibernateutil.java:13)     @ util.hibernateutil.<clinit>(hibernateutil.java:8)     @ cz.cvut.fit.genepi.controllers.logincontroller.login(logincontroller.java:33)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:57)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43)     @ java.lang.reflect.method.invoke(method.java:601)     @ org.springframework.web.method.support.invocablehandlermethod.invoke(invocablehandlermethod.java:213)     @ org.springframework.web.method.support.invocablehandlermethod.invokeforrequest(invocablehandlermethod.java:126)     @ org.springframework.web.servlet.mvc.method.annotation.servletinvocablehandlermethod.invokeandhandle(servletinvocablehandlermethod.java:96)     @ org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter.invokehandlermethod(requestmappinghandleradapter.java:617)     @ org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter.handleinternal(requestmappinghandleradapter.java:578)     @ org.springframework.web.servlet.mvc.method.abstracthandlermethodadapter.handle(abstracthandlermethodadapter.java:80)     @ org.springframework.web.servlet.dispatcherservlet.dodispatch(dispatcherservlet.java:923)     @ org.springframework.web.servlet.dispatcherservlet.doservice(dispatcherservlet.java:852)     @ org.springframework.web.servlet.frameworkservlet.processrequest(frameworkservlet.java:882)     @ org.springframework.web.servlet.frameworkservlet.doget(frameworkservlet.java:778)     @ javax.servlet.http.httpservlet.service(httpservlet.java:621)     @ javax.servlet.http.httpservlet.service(httpservlet.java:722)     @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:305)     @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:210)     @ org.springframework.security.web.filterchainproxy.dofilterinternal(filterchainproxy.java:186)     @ org.springframework.security.web.filterchainproxy.dofilter(filterchainproxy.java:160)     @ org.springframework.web.filter.delegatingfilterproxy.invokedelegate(delegatingfilterproxy.java:346)     @ org.springframework.web.filter.delegatingfilterproxy.dofilter(delegatingfilterproxy.java:259)     @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:243)     @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:210)     @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:225)     @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:169)     @ org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:472)     @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:168)     @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:98)     @ org.apache.catalina.valves.accesslogvalve.invoke(accesslogvalve.java:927)     @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:118)     @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:407)     @ org.apache.coyote.http11.abstracthttp11processor.process(abstracthttp11processor.java:999)     @ org.apache.coyote.abstractprotocol$abstractconnectionhandler.process(abstractprotocol.java:565)     @ org.apache.tomcat.util.net.jioendpoint$socketprocessor.run(jioendpoint.java:309)     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1110)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:603)     @ java.lang.thread.run(thread.java:722) 

your javaassist.jar version incompatible. should use bundle:

<dependency>     <groupid>org.javassist</groupid>     <artifactid>javassist</artifactid>     <version>3.17.1-ga</version> </dependency>