Erro ao buscar no banco

Fala galera, veja se podem me ajudar, tenho o mesmo sistema em clientes diferentes, mesmo banco e mesmas aplicações, porem em um cliente com o tempo pego esse erro no log e nao faz busca no banco mysql , segue log

java.lang.IllegalStateException: EntityManager is closed

at org.hibernate.ejb.EntityManagerImpl.getSession(EntityManagerImpl.java:95)

at org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:291)

at br.com.infraestrutura.aplicacao.ejb.AplicacaoEJB.buscarPorPagina(AplicacaoEJB.java:70)

at br.com.util.SinglePermissaoRegra.checarPaginaExiste(SinglePermissaoRegra.java:41)

at br.com.filtro.WebPhaseListener.afterPhase(WebPhaseListener.java:76)

at com.sun.faces.lifecycle.Phase.handleAfterPhase(Phase.java:189)

at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:107)

at com.sun.faces.lifecycle.RestoreViewPhase.doPhase(RestoreViewPhase.java:123)

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:231)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:688)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1639)

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Unknown Source)