Mysql 循环中的查询-连接丢失-节点JS

我正在尝试执行一组非常大的SELECT语句，每个语句都需要几分钟才能在while循环中完成执行

var con = mysql.createConnection(
{

    host: "host_name",
    user: "user_name",
    password: "password",
    database: "database_name"

});

con.connect();

while(arg1 < arg2)
{

    var query = SELECT * FROM table WHERE value=arg1;
    con.query(query, function (err, result) 
    {
        //Rest of code
    });
    arg = arg + 1;

}
con.end();

在以下代码中：

while(arg1 < arg2)
{

    handleDisconnect();       
    var query = SELECT * FROM table WHERE value=arg1;
    connection.query(query, function (err, result) 
    {
        //Rest of code
    });
    arg = arg + 1;

}

但我仍然收到以下错误消息：

error when connecting to db: { Error: Connection lost: The server closed the connection.
    at Protocol.end (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:109:13)
    at Socket.<anonymous> (C:\Users\X\node_modules\mysql\lib\Connection.js:109:28)
    at emitNone (events.js:110:20)
    at Socket.emit (events.js:207:7)
    at endReadableNT (_stream_readable.js:1047:12)
    at _combinedTickCallback (internal/process/next_tick.js:102:11)
    at process._tickCallback (internal/process/next_tick.js:161:9)
    --------------------
    at Protocol._enqueue (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:141:48)
    at Protocol.handshake (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:52:41)
    at Connection.connect (C:\Users\X\node_modules\mysql\lib\Connection.js:130:18)
    at handleDisconnect (C:\Users\X\connection.js:182:13)
    at Object.<anonymous> (C:\Users\X\connection.js:105:2)
    at Module._compile (module.js:569:30)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:503:32)
    at tryModuleLoad (module.js:466:12)
    at Function.Module._load (module.js:458:3) fatal: true, code: 'PROTOCOL_CONNECTION_LOST' }
C:\Users\X\connection.js:213
                if (err) throw err;
                         ^

Error: Connection lost: The server closed the connection.
    at Protocol.end (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:109:13)
    at Socket.<anonymous> (C:\Users\X\node_modules\mysql\lib\Connection.js:109:28)
    at emitNone (events.js:110:20)
    at Socket.emit (events.js:207:7)
    at endReadableNT (_stream_readable.js:1047:12)
    at _combinedTickCallback (internal/process/next_tick.js:102:11)
    at process._tickCallback (internal/process/next_tick.js:161:9)
    --------------------
    at Protocol._enqueue (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:141:48)
    at Protocol.handshake (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:52:41)
    at Connection.connect (C:\Users\X\node_modules\mysql\lib\Connection.js:130:18)
    at handleDisconnect (C:\Users\X\connection.js:182:13)
    at Object.<anonymous> (C:\Users\X\connection.js:105:2)
    at Module._compile (module.js:569:30)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:503:32)
    at tryModuleLoad (module.js:466:12)
    at Function.Module._load (module.js:458:3)

---

有什么我不知道的，或者有什么我应该知道的，以成功地管理断开？在Node JS理解如何处理同步和异步函数的概念时，我仍然有困难，也许我的问题来自这里。

您确定MySQL配置为允许您连接那么长时间吗？如果为每个查询创建一个新连接，会发生什么情况？@cwallenpole我不确定MySQL的配置，但当我尝试在while循环和con.end的开头编写con.connect时；就在结束之前，我收到了以下错误消息：错误：在已将握手排队后无法将握手排队。

while(arg1 < arg2)
{

    handleDisconnect();       
    var query = SELECT * FROM table WHERE value=arg1;
    connection.query(query, function (err, result) 
    {
        //Rest of code
    });
    arg = arg + 1;

}

error when connecting to db: { Error: Connection lost: The server closed the connection.
    at Protocol.end (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:109:13)
    at Socket.<anonymous> (C:\Users\X\node_modules\mysql\lib\Connection.js:109:28)
    at emitNone (events.js:110:20)
    at Socket.emit (events.js:207:7)
    at endReadableNT (_stream_readable.js:1047:12)
    at _combinedTickCallback (internal/process/next_tick.js:102:11)
    at process._tickCallback (internal/process/next_tick.js:161:9)
    --------------------
    at Protocol._enqueue (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:141:48)
    at Protocol.handshake (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:52:41)
    at Connection.connect (C:\Users\X\node_modules\mysql\lib\Connection.js:130:18)
    at handleDisconnect (C:\Users\X\connection.js:182:13)
    at Object.<anonymous> (C:\Users\X\connection.js:105:2)
    at Module._compile (module.js:569:30)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:503:32)
    at tryModuleLoad (module.js:466:12)
    at Function.Module._load (module.js:458:3) fatal: true, code: 'PROTOCOL_CONNECTION_LOST' }
C:\Users\X\connection.js:213
                if (err) throw err;
                         ^

Error: Connection lost: The server closed the connection.
    at Protocol.end (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:109:13)
    at Socket.<anonymous> (C:\Users\X\node_modules\mysql\lib\Connection.js:109:28)
    at emitNone (events.js:110:20)
    at Socket.emit (events.js:207:7)
    at endReadableNT (_stream_readable.js:1047:12)
    at _combinedTickCallback (internal/process/next_tick.js:102:11)
    at process._tickCallback (internal/process/next_tick.js:161:9)
    --------------------
    at Protocol._enqueue (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:141:48)
    at Protocol.handshake (C:\Users\X\node_modules\mysql\lib\protocol\Protocol.js:52:41)
    at Connection.connect (C:\Users\X\node_modules\mysql\lib\Connection.js:130:18)
    at handleDisconnect (C:\Users\X\connection.js:182:13)
    at Object.<anonymous> (C:\Users\X\connection.js:105:2)
    at Module._compile (module.js:569:30)
    at Object.Module._extensions..js (module.js:580:10)
    at Module.load (module.js:503:32)
    at tryModuleLoad (module.js:466:12)
    at Function.Module._load (module.js:458:3)