Connection Refused Error!! Please help to resolve

Question

I am using Oracle 9i in Windows 2000. I have created a new db called DTSDB. And I have used the following program for getting connection
code:
package com.example; import java.sql.Connection;import java.sql.DriverManager;import java.sql.SQLException;      public class ConnectionPool{          public ConnectionPool(){}          public Connection getConnection(){          Connection con = null;          try{               Class.forName("oracle.jdbc.driver.OracleDriver");                         con = DriverManager.getConnection("jdbc:oracle:thin:@mike-dm210ghop:1521:DTSDB","scott","tiger");                              System.out.println("con ::##############"+con);          }catch(SQLException e){               e.printStackTrace();          }catch(Exception e){               e.printStackTrace();          }          return con;     }      public static void main(String[] args) {          System.out.println(new ConnectionPool().getConnection());     }     }
Error I am getting:
code:
java.sql.SQLException: Io exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=153092352)(ERR=12500)(ERROR_STACK=(ERROR=(CODE=12500)(EMFI=4))(ERROR=(CODE=12537)(EMFI=4))(ERROR=(CODE=12560)(EMFI=4))(ERROR=(CODE=507)(EMFI=4))(ERROR=(BUF='32-bit Windows Error: 109: Unknown error'))))     at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)     at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)     at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:333)     at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:404)     at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:468)     at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:314)     at java.sql.DriverManager.getConnection(Unknown Source)     at java.sql.DriverManager.getConnection(Unknown Source)     at com.example.ConnectionPool.getConnection(ConnectionPool.java:17)     at com.example.ConnectionPool.main(ConnectionPool.java:28)null
I have also tried to create a connection thru ODBC and given the DSN name as "reg" and username and password and I am getting the error as
TNS:listener could not start a dedicated server error
My tnsnames.ora File
====================
code:
# TNSNAMES.ORA Network Configuration File: D:\oracle\ora92\network\admin\tnsnames.ora# Generated by Oracle configuration tools. DTSDB = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = mike-dm210ghop)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = DTSDB) ) ) INST1_HTTP = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = mike-dm210ghop)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = SHARED) (SERVICE_NAME = MODOSE) (PRESENTATION = http://HRService) ) ) EXTPROC_CONNECTION_DATA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0)) ) (CONNECT_DATA = (SID = PLSExtProc) (PRESENTATION = RO) ) ) ORACLE = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = mike-dm210ghop)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = ORACLE) ) )
My listener.ora File:
======================
code:
# LISTENER.ORA Network Configuration File: D:\oracle\ora92\network\admin\listener.ora# Generated by Oracle configuration tools. LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0)) ) (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = mike-dm210ghop)(PORT = 1521)) ) ) ) SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (SID_NAME = PLSExtProc) (ORACLE_HOME = D:\oracle\ora92) (PROGRAM = extproc) ) (SID_DESC = (GLOBAL_DBNAME = ORACLE) (ORACLE_HOME = D:\oracle\ora92) (SID_NAME = ORACLE) ) (SID_DESC = (GLOBAL_DBNAME = DTSDB) (ORACLE_HOME = D:\oracle\ora92) (SID_NAME = DTSDB) ) )
PLease help to reolve my problem

Answer 1

Did you started the Oracle Net Listener for your database instance ?
Can you connect with SQL*Plus to your database instance ?
If no, what are the errors message do you get ?
Did you have a look to the Oracle Net Services Administrator's Guide relevant section.