JDBC connection pool is used for batch import. 5million data are run each time, but various problems will occur in the middle

I wrote a JDBC Connection pool for batch import , Each run 500 All the data , But in the middle there will be various problems

problem 1：The last packet successfully received from the server was 18,967 milliseconds ago. The last packet sent successfully to the server was 18,963 milliseconds ago.
For question 1 The default time is 8 Hours , I just started the project , Can't run 30 minute , How can the connection expire ？ What the Internet says to change out Time , I also changed the invalid ？ Just looking at this time, I don't think it's what the Internet says ？
problem 2： Cut a picture to see the picture

problem 3： It is also an error reported when submitting ;

The code is also posted , Each error is reported when submitting ,ps.executeBatch();;

```java    private void saveForecastSales(List<ForecastSalesDO> forecastSalesDOS, int count) {        try {            if (count > 2) {                log.info("JDBCOperationServiceImpl->saveForecastSales::  Two attempts failed ");                return;            }            Connection connection = dbPool.getConnection();            if (!connection.isValid(1000)){                dbPool.removeConnection(connection);                log.error("JDBCOperationServiceImpl->saveForecastSales::connection ");                connection = DbUtil.createConnection();            }            PreparedStatement  ps = connection.prepareStatement(JDBCUtils.SQL);            connection.setAutoCommit(false);            forecastSalesDOS.forEach(e -> {                try {                    ps.setObject(1, e.getSku());                    ps.setObject(2, e.getErpSku());                    ps.setObject(3, e.getSite());                    ps.setObject(4, e.getMarketId());                    ps.setObject(5, DateUtil.getMinusHours(e.getPaidTime()));                    ps.setObject(6, e.getAmount());                    ps.setObject(7, e.getPlatformId());                    ps.setObject(8, e.getOrderType());                    ps.setObject(9, e.getOrderCategory());                    ps.setObject(10, e.getAsin());                    ps.setObject(11, e.getIdealWarehouse());                    ps.setObject(12, e.getActualFreight());                    ps.setObject(13, e.getActualWarehouse());                    ps.setObject(14, e.getCountry());                    ps.setObject(15, e.getSimulatedNetProfit());                    ps.setObject(16, e.getOrderTotalPrice());                    ps.setObject(17, e.getOrderCode());                    ps.setObject(18, e.getOrderCurrency());                    ps.setObject(19, DateUtil.getMinusHours(e.getOrderCreatedTime()));                    ps.setObject(20, e.getOrderSn());                    ps.setObject(21, e.getFreight());                    ps.setObject(22, e.getUnitPrice());                    ps.setObject(23, e.getIsFba());                    ps.setObject(24, DateUtil.getMinusHours(e.getCreatedTime()));                    ps.setObject(25, e.getCreatedBy());                    ps.setObject(26, DateUtil.getMinusHours(e.getUpdatedTime()));                    ps.setObject(27, e.getUpdatedBy());                    ps.setObject(28, e.getIsDelete());                    ps.addBatch();//                    ps.clearParameters();                } catch (SQLException throwables) {                    log.info(" Inner layer :JDBCOperationServiceImpl->batchForecastSales: abnormal ,{}", throwables.getMessage());                    throw new RuntimeException(throwables);                }            });            DbUtil.executeBatchInsert(connection, ps);            dbPool.releaseConnection(connection);        } catch (SQLException throwables) {            throwables.printStackTrace();            log.info(" Outer layer :JDBCOperationServiceImpl->batchForecastSales: abnormal ,SQLException::{}", throwables.getMessage());            count++;            log.info(" Trying ：：：：：");            this.saveForecastSales(forecastSalesDOS, count);        }    }

public static void executeBatchInsert(Connection connection, PreparedStatement ps) throws SQLException {   if(ps==null){       log.info("executeBatchInsert-> It's empty ");   }    ps.executeBatch();    connection.commit();    ps.clearBatch();    closePs(ps);}

```