Node.js应用程序的node-mysql连接池“无可用连接”

Question

I've got a website I've written that gets data from a Restful web service. That Restful web service is run off node.js and MySQL using node-mysql. The problem I am running into is with connections running out. For example, my default page does a bunch of lookups to get data. On the 9th refresh of that page, one of my lookups to the Restful API throws this error "No connections available."

Here is kind of how things are architected on the Restful API side:

In server.js:

var db = require('mysql');
var db_pool = db.createPool(
{
    host : 'localhost',
    connectionLimit: 100,
    supportBigNumbers: true,
    waitForConnections: false
});

setRoutes(server, db_pool, passport, LocalStrategy, jwt, tokenSecret, bcrypt);

In router.js:

setRoutes = function(server, connectionPool, passport, LocalStrategy, jwt, tokenSecret, bcrypt)
{
    require('./lib/places.js');
    place.connectionPool = connectionPool;
}

server.get('api/place/:id', function(request, response)
{
    response.header("Access-Control-Allow-Origin", "*");
    response.header("Access-Control-Allow-Headers", "X-Requested-With");

    place.get(request.params.id, function(err, data)
    {
        response.send(data);
        next();
    });
});

Finally, in places.js:

place.connectionPool = null;

place.get = function(id, callback)
{
    place.connectionPool.getConnection(function(error, connection) 
    {
        var query = "select myColumn from myTable";

        connection.query
        (
            query,
            function (queryError, rows, fields)
            {
                try {connection.release();} catch(e){};

                if (queryError)
                {
                    console.log(JSON.stringify(queryError));
                    return (callback(null, queryError));
                }

                return (callback(null, rows));
            }
        );
    });
}

What is the best practice for implementing node-mysql and connection pooling for websites?

Thanks!

Answer 1

解决了连接问题-我并未在进行回调的所有位置释放连接。