Erro ao abrir emissor NFE

Bom dia. Gostaria de saber se alguém pode me ajudar com esse erro.

Erro inesperado.

javax.persistence.PersistenceException: org.hibernate.exception.JDBCConnectionException: Cannot open connection
at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:630)
at org.hibernate.ejb.TransactionImpl.begin(TransactionImpl.java:41)
at br.gov.sp.fazenda.dsge.model.dao.util.DSGEDAOHelper.beginTransaction(DSGEDAOHelper.java:131)
at br.gov.sp.fazenda.dsge.model.dao.util.DSGEDAOInterceptorHelper.intercept(DSGEDAOInterceptorHelper.java:54)
at br.gov.sp.fazenda.dsen.model.business.ParametroBusiness$$EnhancerByCGLIB$$a2bb0295.carregaParametrosAppContext(<generated>)
at br.gov.sp.fazenda.dsen.model.facade.ParametroFacade.carregaParametrosAppContext(ParametroFacade.java:40)
at br.gov.sp.fazenda.dsen.controller.DSENSystemController.c(DSENSystemController.java:104)
at br.gov.sp.fazenda.dsen.controller.DSENSystemController.execAfterStartApp(DSENSystemController.java:67)
at br.gov.sp.fazenda.dsge.controller.DSGESystemController.startApp(DSGESystemController.java:151)
at br.gov.sp.fazenda.dsen.view.DSENDesktop$1.run(DSENDesktop.java:115)
Caused by: org.hibernate.exception.JDBCConnectionException: Cannot open connection
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:74)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:426)
at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
at org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:119)
at org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1326)
at org.hibernate.ejb.TransactionImpl.begin(TransactionImpl.java:38)
... 8 more
Caused by: java.sql.SQLException: java.net.ConnectException : Erro ao conectar no servidor 'localhost' porta '1527'. Recebida a mensagem: 'Connection refused: connect'.
at org.apache.derby.client.am.SQLExceptionFactory.getSQLException(Unknown Source)
at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
at org.apache.derby.jdbc.ClientDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:110)
at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:423)
... 13 more
Caused by: org.apache.derby.client.am.DisconnectException: java.net.ConnectException : Erro ao conectar no servidor 'localhost' porta '1527'. Recebida a mensagem: 'Connection refused: connect'.
at org.apache.derby.client.net.NetAgent.<init>(Unknown Source)
at org.apache.derby.client.net.NetConnection.newAgent_(Unknown Source)
at org.apache.derby.client.am.Connection.<init>(Unknown Source)
at org.apache.derby.client.net.NetConnection.<init>(Unknown Source)
at org.apache.derby.client.net.ClientJDBCObjectFactoryImpl.newNetConnection(Unknown Source)
... 18 more
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at org.apache.derby.client.net.OpenSocketAction.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 23 more

Bom dia Allan.

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