Erro Fatal

java.lang.RuntimeException: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not execute query
	at br.univali.sapi.servlets.ListenerImportacaoAutomatica.obterIntervaloVerificacao(ListenerImportacaoAutomatica.java:296)
	at br.univali.sapi.servlets.ListenerImportacaoAutomatica.access$3(ListenerImportacaoAutomatica.java:263)
	at br.univali.sapi.servlets.ListenerImportacaoAutomatica$ServicoImportacaoAutomatica.run(ListenerImportacaoAutomatica.java:110)
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not execute query
	at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1214)
	at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1147)
	at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:307)
	at br.univali.sapi.dao.jpa.JPASapiDAO.carregarConfiguracaoGlobal(JPASapiDAO.java:112)
	at br.univali.sapi.servlets.ListenerImportacaoAutomatica.obterIntervaloVerificacao(ListenerImportacaoAutomatica.java:270)
	... 2 more
Caused by: org.hibernate.exception.GenericJDBCException: could not execute query
	at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140)
	at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
	at org.hibernate.loader.Loader.doList(Loader.java:2536)
	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2276)
	at org.hibernate.loader.Loader.list(Loader.java:2271)
	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:452)
	at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:363)
	at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
	at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1268)
	at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
	at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:274)
	... 4 more
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: A conexão está fechada.
	at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:190)
	at com.microsoft.sqlserver.jdbc.SQLServerConnection.checkClosed(SQLServerConnection.java:388)
	at com.microsoft.sqlserver.jdbc.SQLServerConnection.prepareStatement(SQLServerConnection.java:2166)
	at com.microsoft.sqlserver.jdbc.SQLServerConnection.prepareStatement(SQLServerConnection.java:1853)
	at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:534)
	at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:452)
	at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:161)
	at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1700)
	at org.hibernate.loader.Loader.doQuery(Loader.java:801)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274)
	at org.hibernate.loader.Loader.doList(Loader.java:2533)
	... 12 more