IllegalStateException en JSP

[Langas]

sigue el servlet:

private String getContentType(String s)
{
if(contentType != null)
{
return contentType;
} else
{
return "application/octet-stream";
}
}

public void setPageContext(PageContext pagecontext)
{
pageContext = pagecontext;
}

public void release()
{
compress = false;
inline = false;
file = null;
dir = null;
contentType = null;
}

private File lookupFile(String s)
{
File file1 = new File(s);
return file1.isAbsolute() ? file1 : new File(pageContext.getServletContext().getRealPath("/"), s);
}




public void doGet(HttpServletRequest request, HttpServletResponse response)
throws java.io.IOException, ServletException {

try {

String MM_conexion_DRIVER = "com.mysql.jdbc.Driver";
String MM_conexion_USERNAME = "root";
String MM_conexion_PASSWORD = "langas69";
String MM_conexion_STRING = "jdbc:mysql://localhost/tarific";
String fechaInforme = "";
String extInforme = "";
String ccInforme = "";
String tipoInforme = "";
String tempInforme = "Fecha\tCentro de Coste\tExtensión\tTipo de Llamada\tNum. Llamadas\tTotal segundos\tImporte Total(\u20AC)\n";
if (request.getParameter("reqFecha") != null){
fechaInforme = request.getParameter("reqFecha");
} else fechaInforme = "%";
if (request.getParameter("reqExt") != null){
extInforme = request.getParameter("reqExt");
} else extInforme = "%";
if (request.getParameter("reqCentroCoste") != null){
ccInforme = request.getParameter("reqCentroCoste");
} else ccInforme = "%";
if (request.getParameter("reqTipo") != null){
tipoInforme = request.getParameter("reqTipo");
} else tipoInforme = "%";
String ano = "";
String mes = "";
String dia = "";
String nombreInforme = "informeAgregadoTPI" + fechaInforme + extInforme + ccInforme + tipoInforme;
int acumNumeroLlamadas = 0;
int acumTotalSegundos = 0;
double acumImporte = 0;
Driver DriverRegistros = (Driver)Class.forName(MM_conexion_DRIVER).newInsta nce();
Connection ConnRegistros = DriverManager.getConnection(MM_conexion_STRING,MM_ conexion_USERNAME,MM_conexion_PASSWORD);
PreparedStatement StatementRegistros = ConnRegistros.prepareStatement("SELECT * FROM tarific.adt_agdiallama WHERE id_centro_coste LIKE ? AND nc_extension LIKE ? AND de_clase_llama LIKE ? AND co_dia LIKE ? GROUP BY co_dia, id_centro_coste, nc_extension, de_clase_llama ASC");
StatementRegistros.setString (1,ccInforme);
StatementRegistros.setString (2,extInforme);
StatementRegistros.setString (3,tipoInforme);
StatementRegistros.setString (4,fechaInforme + "__");
ResultSet Registros = StatementRegistros.executeQuery();
boolean Registros_isEmpty = !Registros.next();
boolean Registros_hasData = !Registros_isEmpty;
if (Registros_isEmpty) {
tempInforme += "No hay resultados que mostrar";
} else {
String reg_CC = "";
String reg_ext = "";
String reg_tipo = "";
String reg_dia = "";
String reg_llamadas = "";
String reg_duracion = "";
String sImporte = "";
StringBuffer tAno = new StringBuffer(4);
StringBuffer tMes = new StringBuffer(2);
StringBuffer tDia = new StringBuffer(2);
while (Registros_hasData) {
reg_CC = Registros.getString(1);
reg_ext = Registros.getString(2);
reg_tipo = Registros.getString(3);
reg_dia = Registros.getString(4);
reg_llamadas = Registros.getString(5);
reg_duracion = Registros.getString(6);
Double reg_importe = new Double((double)Math.round(Registros.getDouble(7)*1 00)/100);
sImporte = reg_importe.toString().replace('.',',');
tAno.delete(0,4);
tMes.delete(0,2);
tDia.delete(0,2);
for (int i=0; i <= 3; i++){
tAno.append(reg_dia.charAt(i));
}
ano = tAno.toString();
for (int i=4; i <= 5; i++){
tMes.append(reg_dia.charAt(i));
}
mes = tMes.toString();
for (int i=6; i <= 7; i++){
tDia.append(reg_dia.charAt(i));
}
dia = tDia.toString();
if(reg_ext.equals("-1")){
tempInforme += ano + "/" + mes + "/" + dia + "\t" + reg_CC + "\t" + "TPI Gen&eacute;rico Madrid\t"+ reg_tipo + "\t" + reg_llamadas + "\t" + reg_duracion + "\t" + sImporte + "\n";
} else if(reg_ext.equals("-2")){
tempInforme += ano + "/" + mes + "/" + dia + "\t" + reg_CC + "\t" + "TPI Gen&eacute;rico Barcelona\t" + reg_tipo + "\t" + reg_llamadas + "\t" + reg_duracion + "\t" + sImporte + "\n";
} else if(reg_ext.equals("-3")){
tempInforme += ano + "/" + mes + "/" + dia + "\t" + reg_CC + "\t" + "Televenta Madrid\t" + reg_tipo + "\t" + reg_llamadas + "\t" + reg_duracion + "\t" + sImporte + "\n";
} else if(reg_ext.equals("-4")){
tempInforme += ano + "/" + mes + "/" + dia + "\t" + reg_CC + "\t" + "Televenta Barcelona\t" + reg_tipo + "\t" + reg_llamadas + "\t" + reg_duracion + "\t" + sImporte + "\n";
} else if(reg_ext.equals("-9")){
tempInforme += ano + "/" + mes + "/" + dia + "\t" + reg_CC + "\t" + "Desconocido\t" + reg_tipo + "\t" + reg_llamadas + "\t" + reg_duracion + "\t" + sImporte + "\n";
} else {
tempInforme += ano + "/" + mes + "/" + dia + "\t" + reg_CC + "\t" + reg_ext + "\t" + reg_tipo + "\t" + reg_llamadas + "\t" + reg_duracion + "\t" + sImporte + "\n";
}
acumNumeroLlamadas += Registros.getInt(5);
acumTotalSegundos += Registros.getInt(6);
acumImporte += Registros.getDouble(7);
Registros_hasData = Registros.next();
}

Double dAcumImporte = new Double((double)Math.round(acumImporte*100)/100);
String sAcumImporte = dAcumImporte.toString().replace('.',',');
tempInforme += "TOTAL\t\t\t\t" + acumNumeroLlamadas + "\t" + acumTotalSegundos + "\t" + sAcumImporte + "\n";
}

//Escritura de archivo
String dirInforme = "/files/temp";
String rutaInforme = "webapps/tarific/files/temp/" + nombreInforme;
BufferedWriter salidaInforme = new BufferedWriter(new FileWriter(rutaInforme));
File ficheroInforme = new File(rutaInforme);
salidaInforme.write(tempInforme);
salidaInforme.close();
if (ficheroInforme.exists()){
setCompress(false);
setInline(false);
setDir(dirInforme);
setFile(nombreInforme);
doEndTag();
}
Registros.close();
StatementRegistros.close();
ConnRegistros.close();


} catch (Throwable t) {
System.out.println("cagada" + t.getMessage());
}
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws java.io.IOException, ServletException {
doGet(request,response);
}
}