com.sforce.ws.ConnectionException: Failed to parse detail:  START_TAG seen ...</sf:exceptionMessage><sf:upgradeURL>... @1:752 due to: com.sforce.ws.ConnectionException: unable to find end tag at:  START_TAG seen ...</sf:exceptionMessage><sf:upgradeURL>... @1:752
    at com.sforce.ws.transport.SoapConnection.parseDetail(SoapConnection.java:237)
    at com.sforce.ws.transport.SoapConnection.createException(SoapConnection.java:203)
    at com.sforce.ws.transport.SoapConnection.receive(SoapConnection.java:149)
    at com.sforce.ws.transport.SoapConnection.send(SoapConnection.java:98)
    at com.sforce.soap.partner.PartnerConnection.login(PartnerConnection.java:1)
    at com.sforce.soap.partner.PartnerConnection.<init>(PartnerConnection.java:1)
    at com.sforce.soap.partner.Connector.newConnection(Connector.java:1)

import com.sforce.soap.partner.Connector;
import com.sforce.soap.partner.GetUserInfoResult;
import com.sforce.soap.partner.PartnerConnection;
import com.sforce.ws.ConnectionException;
import com.sforce.ws.ConnectorConfig;

public class Main
{
    public static void main(String[] args)
    {
           String username = "";
           String password = "";
           String authEndPoint = "https://test.salesforce.com/services/Soap/u/39";

           try {
              ConnectorConfig config = new ConnectorConfig();
              config.setUsername(username);
              config.setPassword(password);

              System.out.println("AuthEndPoint: " + authEndPoint);
              config.setAuthEndpoint(authEndPoint);

              PartnerConnection connection =Connector.newConnection(config);

              // Print user and session info
              GetUserInfoResult userInfo = connection.getUserInfo();
              System.out.println("UserID: " + userInfo.getUserId());
              System.out.println("User Full Name: " + userInfo.getUserFullName());
              System.out.println("User Email: " + userInfo.getUserEmail());
              System.out.println();
              System.out.println("SessionID: " + config.getSessionId());
              System.out.println("Auth End Point: " + config.getAuthEndpoint());
              System.out
                    .println("Service End Point: " + config.getServiceEndpoint());
              System.out.println();

           } catch (ConnectionException ce) {
              ce.printStackTrace();
           }
    }

}