关于ORA-08177: can't serialize access for this transaction

这是发生问题的那段代码：            
            for (int iCount = 0; iCount < listVhmRundownData.size(); iCount++) {
                List listVhm = (List) listVhmRundownData.get(iCount);
                for (int iNum = 0; iNum < listVhm.size(); iNum++) {
                    //选出记录集中的每条记录做插入或者更新处理
                    OdrMakeRundownDataStruct stcVhcRundownData =
                        (OdrMakeRundownDataStruct) listVhm.get(iNum);                    StringBuffer strBufSql = new StringBuffer(1000);
                    strBufSql.append("SELECT UPDATECOUNT ");
                    if (strDlrCode.equals("")) {
                        strBufSql.append("FROM DST_RUNDOWNVNM_F ");
                    }
                    else {
                        strBufSql.append("FROM DST_SIMRUNDOWNVNM_F ");
                    }
                    strBufSql.append("WHERE ");
                    strBufSql.append("DLRCODE = '");
                    strBufSql.append(cmnFunction.
                                     addQuota(stcVhcRundownData.strDlrCode));
                    strBufSql.append("' AND TGTYEAR = ");
                    strBufSql.append(stcVhcRundownData.strTgtYear);
                    strBufSql.append(" AND TGTMONTH = ");
                    strBufSql.append(stcVhcRundownData.strTgtMonth);
                    strBufSql.append(" AND VHCNAMECODE = '");
                    strBufSql.append(cmnFunction.
                                     addQuota(stcVhcRundownData.strVhcNameCode));
                    strBufSql.append("' FOR UPDATE");
                    System.out.println(strBufSql.toString());                    // SQL执行
                    stmt.execute(strBufSql.toString());                    ResultSet rset = stmt.getResultSet();
                    System.out.println("sql success!");                    if (rset.next()) {
                        //取出updatecount,并做加1处理
                        String UpdateCount = cmnFunction.
                            isNullToZero(rset.getString("UPDATECOUNT"));
                        int update = (Integer.parseInt(UpdateCount) + 1) % 1000;
                        stcVhcRundownData.strUpdateCount = String.valueOf(
                            update);
                        rset.close();
                        if (strDlrCode.equals("")) {
                            //Rundown型式表中存在对应的记录，做更新操作
                            doUpdateRundown(stmt, 1, stcVhcRundownData, iCount);
                        }
                        else {
                            doUpdateRundown(stmt, 3, stcVhcRundownData, iCount);
                        }
                    }
                    else {
                        rset.close();
                        if (strDlrCode.equals("")) {
                            //Rundown型式表中不存在对应的记录，做插入操作
                            doInsertRundown(stmt, 1, stcVhcRundownData);
                        }
                        else {
                            doInsertRundown(stmt, 3, stcVhcRundownData);
                        }
                    }
                }
            }
它是在批量插入数据时发生的问题，就是在插入几次数据以后，在作select查询时发生的问题。