C# 并发和多线程期间的MySQL连接异常

我正在从事一个项目，该项目涉及从sim卡读取消息，将它们插入MySQL数据库表，并回复每一条消息。我的sim卡最多可以处理30条信息。以前我所做的是一次读取所有30条信息，将它们插入数据库，同时从sim卡中删除它们，这样新的信息就可以进来。在消息被放入表中后，我一次只接收一条消息并回复它，同时将其从表中删除

最近我尝试了一种使用线程的新方法。现在，这些消息被读入表中，同时被回复。这大大提高了性能并缩短了响应时间，但出现了一些问题。在下面的代码中，在成功连接30-60秒后，

connection.open（）

函数有时会出现异常。异常情况类似于“使用localhost连接到MySQL服务器时出错”

该程序在我的电脑上运行良好，但故障发生在其他电脑上

private void btnReadMessages_Click(object sender, System.EventArgs e)
{
    Thread.CurrentThread.Name = "Main";

    Thread ReadMsgsThread = new Thread(new ThreadStart(delegate
    {
        while (true)
        {
            readMsgs();
        }
    }));

    Thread ReplyMsgsThread = new Thread(new ThreadStart(delegate
    {
        while (true)
        {
            replyMsgs();
        }
    }));

    ReadMsgsThread.Start();
    Output("Reading Messages..");
    Output("");
    ReplyMsgsThread.Start();
}

private void readMsgs()
{
    String connectionString = "DRIVER={MySQL ODBC 3.51Driver};Database=sms;Server=localhost;UID=hasnat;PWD=123;";

    OdbcConnection connection = new OdbcConnection(connectionString);
    Cursor.Current = Cursors.WaitCursor;

    string storage = GetMessageStorage();
    connection.Open();

    try
    {
        DecodedShortMessage[] messages = comm.ReadMessages(PhoneMessageStatus.All, storage);

        if (messages.Length != 0)
        {
            foreach (DecodedShortMessage message in messages)
            {
                SmsDeliverPdu data = (SmsDeliverPdu)message.Data;

                OdbcCommand command = new OdbcCommand("INSERT INTO smstable (sms,phone) VALUES ('" + data.UserDataText + "','" + data.OriginatingAddress + "')", connection);

                command.ExecuteNonQuery();
                delMsgAtIndex(message.Index);
            }
        }
    }
    catch (Exception ex)
    {
        ShowException(ex);
    }

    connection.Close();
    Thread.Sleep(5000);

    Cursor.Current = Cursors.Default;
}

private void replyMsgs()
{
    String connectionString = "DRIVER={MySQL ODBC 3.51 Driver};Database=sms;Server=localhost;UID=hasnat;PWD=123;";

    OdbcConnection connection = new OdbcConnection(connectionString);
    connection.Open();

    try
    {
        OdbcCommand commandSelect = new OdbcCommand("SELECT id,phone,sms FROM smstable", connection);

        OdbcDataReader dr = commandSelect.ExecuteReader();

        while (dr.Read())
        {
            System.Threading.Thread.Sleep(5000);

            if (dr["sms"].ToString().Length == 13)
            {
                OdbcCommand commandGetInfo = new OdbcCommand("SELECT nic,name,hospital,accType,date,status FROM patients where nic='"+dr["sms"].ToString()+"';", connection);
                OdbcDataReader getInfo = commandGetInfo.ExecuteReader();

                if (getInfo.HasRows)
                {
                    while (getInfo.Read())
                    {
                        sendMsg(dr["phone"].ToString(), "Name: "+getInfo["name"].ToString() + " Hospital: " + getInfo["hospital"].ToString() + " Accident: " + getInfo["accType"].ToString() + " Date: " + getInfo["date"].ToString() + " Status: " + getInfo["status"].ToString());
                        OdbcCommand commandDelRepliedSMS = new OdbcCommand("Delete FROM smstable where id=" + dr["id"].ToString(), connection);
                        OdbcDataReader drDelRepliedSMS = commandDelRepliedSMS.ExecuteReader();
                    }
                }
                else 
                {
                    sendMsg(dr["phone"].ToString(), "No Patient Record Found For Provided NIC,Check NIC or Visit Our Website www.emg1122.com For More Detailed Search");
                    OdbcCommand commandDelNotFoundSMS = new OdbcCommand("Delete FROM smstable where id=" + dr["id"].ToString(), connection);
                    OdbcDataReader drDelNotFoundSMS = commandDelNotFoundSMS.ExecuteReader();
                }
            }
            else 
            {
                sendMsg(dr["phone"].ToString(),"NIC Should Be 13 Digits Long And No Dashes or Alphabets");
                OdbcCommand commandDelWrongSMS = new OdbcCommand("Delete FROM smstable where id=" + dr["id"].ToString(), connection);
                OdbcDataReader drDelWrongSMS = commandDelWrongSMS.ExecuteReader();
            }
        }
    }
    catch (Exception ex)
    {
        ShowException(ex);
    }
    connection.Close();
}

private void sendMsg(String phno,String reply)
{
    Cursor.Current = Cursors.WaitCursor;

    try
    {
        // Send an SMS message
        Output("Replying To:{0}", phno);
        SmsSubmitPdu pdu;

        pdu = new SmsSubmitPdu(reply, phno);          
        comm.SendMessage(pdu);

        Output("Message Replied To {0}", phno);
        Output("");
    }
    catch (Exception ex)
    {
        ShowException(ex);
    }

    Cursor.Current = Cursors.Default;
}   

private void delMsgAtIndex(int index)
{
    Cursor.Current = Cursors.WaitCursor;

    string storage = GetMessageStorage();
    try
    {
        // Delete the message with the specified index from storage
        comm.DeleteMessage(index, storage);
    }
    catch (Exception ex)
    {
        ShowException(ex);
    }

    Cursor.Current = Cursors.Default;
}

---

请复制确切的异常消息。错误[HY000][MySQL][ODBC 3.51驱动程序]无法连接到“localhost”（10061）上的MySQL服务器检查这个问题的答案：不，我不认为这里是这样的。程序运行30到60秒都很好。在此期间，mysql表由两个线程访问，没有任何错误或冲突。链接中讨论的问题是连接建立失败，但我这里不是这样