ORA-01013: user requested cancel of current operation

I got the error ORA-01013: user requested cancel of current operation when the following code is running.

import java.io.*;
import java.sql.*;
import java.util.*;

public abstract class Manager {

        try {
            BLOB blob = ((OracleResultSet)rs).getBLOB(index);
            System.out.println("fetched doc blob.length() = " +
blob.length());
            InputStream inStream = blob.getBinaryStream();
            byte[] data = new byte[(int)blob.length()];
            inStream.read(data);
            return data;


        }

        catch(Exception e){
            System.out.println(e.getMessage());


        }

        return null;

} Received on Thu Apr 13 2000 - 00:00:00 CEST