[-4008]: Unknown user name/password combination (MaxDB, Java)

Question

Hey,
I'm having some troubles to connect to MaxDB using Java. I'm getting some error when I try to run my program.
import java.sql.*;
public class Hello
public static void main(String[] args)
     throws ClassNotFoundException, SQLException
          String username = "DBM";
          String password = "azerty";
          String dbname = "SAPDB";
          Class.forName ("com.sap.dbtech.jdbc.DriverSapDB");
          Connection connection = DriverManager.getConnection("jdbc:sapdb:" + dbname, username, password);
Exception in thread "main" com.sap.dbtech.jdbc.exceptions.DatabaseException: [-4008]: Unknown user name/password combination
     at com.sap.dbtech.jdbc.packet.ReplyPacket.createException(ReplyPacket.java:69)
     at com.sap.dbtech.jdbc.ConnectionSapDB.throwSQLError(ConnectionSapDB.java:768)
     at com.sap.dbtech.jdbc.ConnectionSapDB.execute(ConnectionSapDB.java:434)
     at com.sap.dbtech.jdbc.ConnectionSapDB.execute(ConnectionSapDB.java:325)
     at com.sap.dbtech.jdbc.ConnectionSapDB.doConnect(ConnectionSapDB.java:277)
     at com.sap.dbtech.jdbc.ConnectionSapDB.<init>(ConnectionSapDB.java:81)
     at com.sap.dbtech.jdbc.DriverSapDB.connect(DriverSapDB.java:184)
     at java.sql.DriverManager.getConnection(Unknown Source)
     at java.sql.DriverManager.getConnection(Unknown Source)
I checked the User  and Password  with the GUI (Database manager) and everything works fine.
I've also added the .jar in my Project Library.
Any ideas ?
Thanks

Answer 1

Looking at your screen shot, it seems the database instance itself hasn't been correctly created because you lack permissions to do so. Subsequently, all your connection attempts basically fail because the database does not exists. I'm no real expert in SAP MaxDB administration on Microsoft Windows, but I read about System Error 5 once in a while earlier, have a look at  [http://www.syseva.com/2009/05/operating-system-error-5-5access-is-denied/|http://www.syseva.com/2009/05/operating-system-error-5-5access-is-denied/]. Overally, I suspect you don't have the permissions you need to have (operating system/file system -wise) in order to create the files belonging to a MaxDB instance (and/or required by the server and tools, such as the dbmsrv ... err file mentioned in the screen). Maybe you should check your system permissions? Are you administrator or member of the appropriate groups [http://maxdb.sap.com/doc/7_7/0e/218650d996419d91f6b234766eadd3/content.htm|http://maxdb.sap.com/doc/7_7/0e/218650d996419d91f6b234766eadd3/content.htm]? As pointed out, I'm no MaxDB/Windows expert, but this seems likely to be a problem as far as your screenshot is concerned.
Cheers,
Kristian