为什么此代码引发SQLException：-ORA-01000：超出了最大打开游标

Question

对于以下代码，我在循环中插入2400多个行。在完成所有操作之前，我永远不会关闭连接。它引发异常。有什么问题，我在这里错过了什么？

    private PreparedStatement pst = connection.prepareStatement(INSERT_FAILED_INTERIOR_ROOM);
    private Connection connection = null;

    public static void insertIntoFaildIRoom(String master, String room, String xmlContent) {
        try {
            pst.setString(1, master);
            pst.setString(2, room);
            pst.setString(3, xmlContent);
            pst.executeUpdate();
            connection.commit();
            System.out.println("failed room insert commited");
        } catch (SQLException e) {
            try {
                connection.rollback();
            } catch (SQLException e1) {
                /* Nothing */}
            String errorMsg = String.format("SQL State: %s\n%s", e.getSQLState(), e.getMessage());
            System.out.println(errorMsg);
        } catch (Exception ex) {
            System.out.println("Error when insert in failed room " + ex.getMessage());
        } 
    }


public String addResponse(){
    try {
        if (connection == null) {
            connection = MainConnection.open();
        }
        if (connection != null) {
            System.out.println("Connected to the database!");
            InteriorRoomBatch batch = new InteriorRoomBatch();
            batch.fillInteriorDetailsFromCache();
            for (InteriorDetails interiorDetails : batch.getInteriorDetailsList()) {
                addRoomQuery.insertIntoFaildIRoom(interiorDetails.getMaster(), interiorDetails.getRoom(), interiorDetails.xmlContent() );
            }
        } else {
            System.out.println("Failed to make connection!");
        }

    } catch (SQLException e) {
        // After inserting coupel of hundrands of row, it throw excetion  ORA-01000: maximum open cursors exceeded
        String errorMsg = String.format("SQL State: %s\n%s", e.getSQLState(), e.getMessage());
        System.out.println(errorMsg);
    }finally {
        close(pst);
        connection.close();
        System.out.println("close the PreparedStatement after");
    }
    return "ok";
}