JDBC SQLServer: Error when loosing connection

Question

Hi all,
I have this problem: I�m using microsoft jdbc driver for sqlserver 4 to connect to my sqlserver database. The connection is working just fine, but I want to create a method to reconnect to the database if the connection is lost (for example, if the SQLServer machine is rebooted).
I test to see whether if the connection is closed. If it�s closed, I set the connection to null and try to connect again, but it gives me this error:
[Microsoft][SQLServer JDBC Driver][SQLServer]Cannot open database requested in login 'XXXX'. Login fails.
The login and password are the same. Nothing is different from the first routine that connects to the database.
If I shutdown the application and start again, it works. So, my problem is with the reconnect routine, but it just calls the first connect routine.
What could be the problem? any hints?
Tks a lot
Rodrigo

Answer 1

Ok
Here is part of my code:
First of all, I call this code in the constructor of the object:
con = getConnection();
Here is the getConnection code:
     private Connection getConnection()
          LogFile.logInfo("MMSSender","getConnection()","Creating connection...");
          try
               con = DataBaseManager.getConnection();          
          catch (Exception e)
               LogFile.logError("MMSSender","getConnection()",e.getMessage());
          LogFile.logInfo("MMSSender","getConnection()","Connection created.");
          return con;
here is the reConnect() code
     public void reConnect()
          try
                    DataBaseManager.releaseConnection(con);
                    LogFile.logInfo("MMSSender","reConnect()","Reabrindo conex�o com o banco de dados ...");
                    con = getConnection();
                    LogFile.logInfo("MMSSender","reConnect()","Conex�o reaberta com sucesso");
          catch (Exception e)
               LogFile.logError("MMSSender","reConnect()",e.getMessage());
//DATABASEMANAGER class
public static Connection getConnection() throws SQLException, ClassNotFoundException, InstantiationException, IllegalAccessException, ConstanteException{
     Connection conn     = null;
     String login = null;
     String password = null;
     String connect = null;
     String driver = null;
     login      = Constantes.getConstante("usr");
     password = Constantes.getConstante("pass");
     connect      = Constantes.getConstante("connStr");
     driver = Constantes.getConstante("driver");
     cls = Class.forName(driver);
     d = (Driver) cls.newInstance();
     DriverManager.registerDriver(d);
     conn = DriverManager.getConnection(connect, login, password);
     return conn;
public static void releaseConnection(Connection conn) {
     try {
          conn.close();
          conn = null;
     catch (Exception e){
          System.out.println("Erro ao liberar a conex�o com a base de dados: "+e);
Tks again
Rodrigo