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POnode-mysql unable to handle multiple queries?
 

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    <p>I am using: node-mysql</p> <p>arrtickers got around 200 values.</p> <p>arrtickers closure pass in values into sym.</p> <p>sym will pass in value to each function (running in async mode, each fn will start running on its own without waiting for the previous fn to complete)</p> <p>problem here is mysql seems unable to handle multiple calls?</p> <pre><code>events.js:48 throw arguments[1]; // Unhandled 'error' event ^ Error: reconnection attempt failed before connection was fully set up at Socket.&lt;anonymous&gt; (/home/ubuntu/node/node_modules/mysql/lib/client.js:67:28) at Socket.emit (events.js:64:17) at TCP.onread (net.js:398:51) arrtickers.forEach(function(value) { var sym= value; (function(sym) { url2= "http://test2.com/quote.ashx?t="+sym+"&amp;ty=c&amp;ta=1&amp;p=d&amp;b=1"; request({ uri:url2 }, function (error, response, body) { jsdom.env({ html: body, scripts: [ jqlib ] }, function (err, window) { var $ = window.jQuery; var data= $('body').html(); //some scrapping var client2 = mysql.createClient({ user: 'root', password: '123', host: '127.0.0.1', port: '3306' }); client2.query('USE testtable'); sql= "update tbla SET a='"+a+"', b='"+b+"', c='"+c+"', d='"+d+"' where ticker='"+sym+"'"; client2.query( sql, function(err, info){ if (err) { throw err; } } ); client2.end(); }); }); })(sym); (function(sym) { url= "http://test3.com/quote.ashx?t="+sym+"&amp;ty=c&amp;ta=1&amp;p=d&amp;b=1"; request({ uri:url3 }, function (error, response, body) { jsdom.env({ html: body, scripts: [ jqlib ] }, function (err, window) { var $ = window.jQuery; var data= $('body').html(); //some scrapping var client3 = mysql.createClient({ user: 'root', password: '123', host: '127.0.0.1', port: '3306' }); client3.query('USE testtable'); sql= "update tbla SET a='"+a+"', b='"+b+"', c='"+c+"', d='"+d+"' where ticker='"+sym+"'"; client3.query( sql, function(err, info){ if (err) { throw err; } } ); client3.end(); }); }); })(sym); (function(sym) { url= "http://test4.com/quote.ashx?t="+sym+"&amp;ty=c&amp;ta=1&amp;p=d&amp;b=1"; request({ uri:url4 }, function (error, response, body) { jsdom.env({ html: body, scripts: [ jqlib ] }, function (err, window) { var $ = window.jQuery; var data= $('body').html(); //some scrapping var client4 = mysql.createClient({ user: 'root', password: '123', host: '127.0.0.1', port: '3306' }); client4.query('USE testtable'); sql= "update tbla SET a='"+a+"', b='"+b+"', c='"+c+"', d='"+d+"' where ticker='"+sym+"'"; client4.query( sql, function(err, info){ if (err) { throw err; } } ); client4.end(); }); }); })(sym); //same function repeat for test5.com, test6.com, test7.com, test8.com, test9.com }); </code></pre> <p>Below is portion of the code from client.js (part of node-mysql) I don't really understand how the whole process get linked together, any idea guys?</p> <pre><code>Client.prototype._connect = function() { this.destroy(); var socket = this._socket = new Socket(); var parser = this._parser = new Parser(); var self = this; socket .on('error', this._connectionErrorHandler()) .on('data', parser.write.bind(parser)) .on('end', function() { if (self.ending) { // @todo destroy()? self.connected = false; self.ending = false; if (self._queue.length) { self._connect(); } return; } if (!self.connected) { this.emit('error', new Error('reconnection attempt failed before connection was fully set up')); return; } self._connect(); }) .connect(this.port, this.host); parser.on('packet', this._handlePacket.bind(this)); }; </code></pre>
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    1. USi need help
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    1. COI hope `a`, `b`, `c`, etc. are properly sanitized, otherwise this is an [SQL injection vulnerability](http://en.wikipedia.org/wiki/SQL_injection).
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    2. COhaha, thanks for advice. Can put up later.
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    3. COIt doesn't really matter for the question; I just wanted to make sure you were aware of it. :)
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