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java.lang.ClassCastException: org.hibernate.dialect.H2Dialect cannot be cast to org.hibernate.dialect.Dialect	at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:73)	at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:64)	at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:146)	at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:75)	at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:159)	at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:131)	at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)	at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2273)	at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2269)	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1738)	at org.hibernate.ejb.EntityManagerFactoryImpl.(EntityManagerFactoryImpl.java:88)	at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904)	at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:889)	at ru.buzzsoft.common.HibernateHelper.createEntityManagerFactory(HibernateHelper.java:180)	at ru.buzzsoft.delivery.PersistentFactory.getEntityPersonalFactory(PersistentFactory.java:21)	at ru.buzzsoft.delivery.server.api.impl.ContextImpl.(ContextImpl.java:126)	at ru.buzzsoft.delivery.server.api.impl.ContextImpl.(ContextImpl.java:89)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:525)	at java.lang.Class.newInstance0(Class.java:372)	at java.lang.Class.newInstance(Class.java:325)	at org.mortbay.jetty.servlet.Holder.newInstance(Holder.java:153)	at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:253)	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)	at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:616)	at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513)	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)	at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)	at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115)	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)	at org.mortbay.jetty.Server.doStart(Server.java:222)	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)	at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672)	at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)	at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)	at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)	at com.google.gwt.dev.DevMode.main(DevMode.java:311)