Exception while initializing ExpressDataProvider

Question

Hi all,
I am beginner with Oracle OLAP. I was trying to use OLAP api. I have written a small piece of code which will create a conection to DB and create an ExpressDataProvider.
Here is the code
import com.sun.java.util.collections.ArrayList;
import com.sun.java.util.collections.List;
import com.sun.java.util.collections.Iterator;
import java.sql.*;
import oracle.express.mdm.*;
import oracle.olapi.metadata.*;
import oracle.olapi.data.source.*;
import oracle.express.olapi.data.full.*;
import oracle.express.olapi.transaction.*;
public class Sample_OLAP {
public Sample_OLAP(){
public static void main(String[] args) {
try {
     Class.forName("oracle.jdbc.driver.OracleDriver");
     catch (ClassNotFoundException ex) {
String url = "jdbc:oracle:thin:@mrutyunjay:1521:mmh";
     String user = "sh";
     String password = "sh";
     oracle.jdbc.OracleConnection conn = null;
     try {
     conn = (oracle.jdbc.OracleConnection)java.sql.DriverManager.getConnection(url, user, password);
     System.out.println("Connected "+conn);
     catch (SQLException ex1) {
     ExpressTransactionProvider tp = new ExpressTransactionProvider();
     System.out.println(" ExpressTransactionProvider "+tp);
ExpressDataProvider dp = new ExpressDataProvider(conn, tp);
System.out.println(" ExpressDataProvider "+dp);
     try {
     dp.initialize();
     catch (Exception ex2) {
     ex2.printStackTrace();
// Close the connection
try {
dp.close();
catch (Exception ex5) {
ex5.printStackTrace();
try {
conn.close();
catch (SQLException ex4) {
and here is the result
Connected oracle.jdbc.driver.OracleConnection@6f8cf3
ExpressTransactionProvider [email protected]c
ExpressDataProvider oracle.express.olapi.data.full.ExpressDataProvider@4ec0c5
oracle.express.idl.util.OlapiException
     at oracle.express.idl.ExpressConnectionModule.ServerInterfaceStub.connect(ServerInterfaceStub.java:336)
     at oracle.express.olapi.data.full.ExpressDataProvider.connect(ExpressDataProvider.java:229)
     at oracle.express.olapi.data.full.ExpressDataProvider.initialize(ExpressDataProvider.java:200)
     at Sample_OLAP.main(Sample_OLAP.java:41)
java.lang.NullPointerException
     at oracle.express.olapi.data.full.ExpressDataProvider.close(ExpressDataProvider.java:559)
     at Sample_OLAP.main(Sample_OLAP.java:48)
Please suggest what is going wrong here
Thanks

Answer 1

Anthony,
There's not much to go on here, so I would try the usual route:
1) What version of OLAP Server are you using and please verify that the jar files, especially the JDBC jars, are the correct versions. The client jars should match the server's.
2) Run one of the check config utilities on your metadata such as the BI Beans'.