当我使用节点mysql时,在12:00到2:00之间出现错误,表明服务器已关闭TCP连接。这是完整的消息:
Error: Connection lost: The server closed the connection. at Protocol.end (/opt/node-v0.10.20-linux-x64/IM/node_modules/mysql/lib/protocol/Protocol.js:73:13) at Socket.onend (stream.js:79:10) at Socket.EventEmitter.emit (events.js:117:20) at _stream_readable.js:920:16 at process._tickCallback (node.js:415:13)
有解决办法。但是,以这种方式尝试后,问题也会出现。现在我不知道该怎么办。有人遇到这个问题吗?
这是我按照解决方案编写的方式:
var handleKFDisconnect = function() { kfdb.on('error', function(err) { if (!err.fatal) { return; } if (err.code !== 'PROTOCOL_CONNECTION_LOST') { console.log("PROTOCOL_CONNECTION_LOST"); throw err; } log.error("The database is error:" + err.stack); kfdb = mysql.createConnection(kf_config); console.log("kfid"); console.log(kfdb); handleKFDisconnect(); }); }; handleKFDisconnect();
尝试使用以下代码来处理服务器断开连接:
var db_config = { host: 'localhost', user: 'root', password: '', database: 'example' }; var connection; function handleDisconnect() { connection = mysql.createConnection(db_config); // Recreate the connection, since // the old one cannot be reused. connection.connect(function(err) { // The server is either down if(err) { // or restarting (takes a while sometimes). console.log('error when connecting to db:', err); setTimeout(handleDisconnect, 2000); // We introduce a delay before attempting to reconnect, } // to avoid a hot loop, and to allow our node script to }); // process asynchronous requests in the meantime. // If you're also serving http, display a 503 error. connection.on('error', function(err) { console.log('db error', err); if(err.code === 'PROTOCOL_CONNECTION_LOST') { // Connection to the MySQL server is usually handleDisconnect(); // lost due to either server restart, or a } else { // connnection idle timeout (the wait_timeout throw err; // server variable configures this) } }); } handleDisconnect();
在您的代码中,我错过了之后的部分 connection = mysql.createConnection(db_config);
connection = mysql.createConnection(db_config);