when saving an object to database using hibernate, sometimes it fails because certain fields of the object exceed the maximum varchar length defined in the database. There force I am using the following approach:
1. attempt to save
2. if getting an DataException, then I truncate the fields in the object to the max length specified in the db definition, then try to save again.
However, in the second save after truncation. I'm getting the following exception:

hibernate: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails

here's the relevant code, what's wrong?

  public static void saveLenientObject(Object obj){

        try {
            save2(rec);
        } catch (org.hibernate.exception.DataException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();


            saveLenientObject(rec, e);



        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }



    }
    private static void saveLenientObject(Object rec, DataException e) {
        Util.truncateObject(rec);
        System.out.println("after truncation ");
        save2(rec);

    }
    public static void save2(Object obj) throws Exception{
        try{
            beginTransaction();
            getSession().save(obj);

            commitTransaction();

        }catch(Exception e){
            e.printStackTrace();
            rollbackTransaction();
            //closeSession();
            throw e;
        }finally{
            closeSession(); 
        }
    }