Question

Dear all,
I am using java rmi for my program, from client side i am calling my interface method by passing single argument. Using this argument interface runs a query and returns 40,000 rows(each row containing 10 row)as a result.All these are stored in vector inside vector structure [[0,1,2,3,4,5,6,7,8,9],[],[],[],[],[]…]. This things happen when i am clicking one button. First time its works but again i am trying to do the same (ie clicking button ) It shows java.lang.out of memory exception at client side. pls help me.I am using Postgresql db.

Client side:
    Vector data = new Vector();
    data = Inter.getEndProductDetailsForCopyChain(endProductId);

Server side:
    public Vector getEndProductDetailsForCopyChain(int endProductId1)
    {
        Connection OPConnect  = StreamLineConnection.GetStreamline_Connection();
        Vector data=new Vector();       
        try{        
            System.out.println("Before query data vector size>>>>>>>>"+data.size());//mohan
            String sqlQry = "select distinct style_no,version_no,matNo,type,specs,color,size,ref_no,uom1 from garment where id=" +endProductId1;
            System.out.println("sqlQry"+ sqlQry);
            Statement st=OPConnect.createStatement();
            ResultSet rs = st.executeQuery(sqlQry);
            while(rs.next()){
                Vector row = new Vector();
                row.add(rs.getString("style_no"));
                row.add(rs.getString("version_no"));
                row.add(rs.getString("matNo"));
                row.add(rs.getString("type"));
                row.add(rs.getString("specs"));
                row.add(rs.getString("color"));
                row.add(rs.getString("size"));
                row.add(rs.getString("ref_no"));
                row.add(rs.getString("uom1"));
                row.add(new Boolean(false));
                data.add(row);
                }
            System.out.println("After query data vector size>>>>>>>>"+data.size());
        }catch(Exception e)
        {    e.printStackTrace();
             closeConnection(OPConnect);
        }
            return data;
       }

I cleared all the vectors and hashmap after finishing my process but still throwing Out of memory exception at client side this happens when data(query result vector) dispatched to client side.

Answer 1

Try to re-use data, do not create a new vector on every request. data.clear(); // fill it then.