org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.stat.spi.StatisticsImplementor]

org.hibernate.service.UnknownServiceException: Unknown service requested [org.hibernate.stat.spi.StatisticsImplementor]	at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:184)	at org.hibernate.internal.SessionFactoryImpl.getStatisticsImplementor(SessionFactoryImpl.java:1168)	at org.hibernate.internal.SessionFactoryImpl.getStatistics(SessionFactoryImpl.java:1164)	at org.hibernate.internal.SessionImpl.close(SessionImpl.java:417)	at org.hibernate.jpa.internal.EntityManagerImpl.close(EntityManagerImpl.java:145)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:497)	at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:344)	at com.sun.proxy.$Proxy151.close(Unknown Source)	at org.springframework.orm.jpa.EntityManagerFactoryUtils.closeEntityManager(EntityManagerFactoryUtils.java:438)	at org.springframework.orm.jpa.SharedEntityManagerCreator$DeferredQueryInvocationHandler.invoke(SharedEntityManagerCreator.java:378)	at com.sun.proxy.$Proxy153.getResultList(Unknown Source)	at com.see3.propelit.dao.impl.BasicDaoImpl.getSingleResult(BasicDaoImpl.java:109)	at com.see3.propelit.dao.impl.AccountDaoImpl.loadAccountByEmail(AccountDaoImpl.java:44)	at com.see3.propelit.dao.impl.AccountDaoImpl$$FastClassBySpringCGLIB$$a12ddd7f.invoke(<generated>)	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:651)	at com.see3.propelit.dao.impl.AccountDaoImpl$$EnhancerBySpringCGLIB$$d9829aca.loadAccountByEmail(<generated>)	at com.see3.propelit.service.impl.AccountServiceImpl.loadAccountByEmail(AccountServiceImpl.java:103)	at com.see3.propelit.web.util.jsf.validators.UniqueUsernamelValidator.isUsernameExisted(UniqueUsernamelValidator.java:63)	at com.see3.propelit.web.util.jsf.validators.UniqueUsernamelValidator.validate(UniqueUsernamelValidator.java:44)	at javax.faces.component.UIInput.validateValue(UIInput.java:1164)	at javax.faces.component.UIInput.validate(UIInput.java:982)	at javax.faces.component.UIInput.executeValidate(UIInput.java:1248)	at javax.faces.component.UIInput.processValidators(UIInput.java:712)	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1261)	at javax.faces.component.UIForm.processValidators(UIForm.java:253)	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1261)	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1261)	at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1195)	at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76)	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.see3.propelit.web.util.jsf.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:26)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.see3.propelit.web.security.LoggedInFilter.doFilter(LoggedInFilter.java:53)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)	at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:106)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)	at org.apache.catalina.core.StandardHostValve.__invoke(StandardHostValve.java:142)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Thread.java:745)