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org.hibernate.MappingException: Dialect does not support sequences	at org.hibernate.dialect.Dialect.getSequenceNextValString(Dialect.java:430)	at org.hibernate.id.SequenceGenerator.configure(SequenceGenerator.java:65)	at org.hibernate.id.IdentifierGeneratorFactory.create(IdentifierGeneratorFactory.java:88)	at org.hibernate.mapping.SimpleValue.createIdentifierGenerator(SimpleValue.java:151)	at org.hibernate.impl.SessionFactoryImpl.(SessionFactoryImpl.java:178)	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1005)	at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:800)	at org.springframework.orm.hibernate3.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:726)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1059)	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:363)	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:226)	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:147)	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:269)	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:320)	at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:134)	at org.springframework.web.struts.ContextLoaderPlugIn.createWebApplicationContext(ContextLoaderPlugIn.java:353)	at org.springframework.web.struts.ContextLoaderPlugIn.initWebApplicationContext(ContextLoaderPlugIn.java:296)	at org.springframework.web.struts.ContextLoaderPlugIn.init(ContextLoaderPlugIn.java:225)	at org.apache.struts.action.ActionServlet.initModulePlugIns(ActionServlet.java:869)	at org.apache.struts.action.ActionServlet.init(ActionServlet.java:336)	at javax.servlet.GenericServlet.init(GenericServlet.java:256)	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1044)	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:887)	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3959)	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4284)	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:866)	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:850)	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:638)	at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:320)	at org.apache.catalina.core.StandardHost.install(StandardHost.java:875)	at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:727)	at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:477)	at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1008)	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:394)	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:166)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1134)	at org.apache.catalina.core.StandardHost.start(StandardHost.java:832)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1126)	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:521)	at org.apache.catalina.core.StandardService.start(StandardService.java:519)	at org.apache.catalina.core.StandardServer.start(StandardServer.java:2345)	at org.apache.catalina.startup.Catalina.start(Catalina.java:594)	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:297)	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:398)