Node.js HTTP Server Stops Listening

I have an HTTP server setup on port 1338 to listen on the IP for the server. This works just fine when I first launch Node, but for some reason I have run into issues where the server randomly stops listening. I have checked the logs that Forever is collecting from my app including any uncaught exceptions. Nothing shows up in the logs of having any error since startup.

My question is two fold. What would cause the server to stop listening at random intervals? Also what check should be running in Node so that I can log out the error that is causing the listener to stop?

Here is the code below for my HTTP Server.

http.createServer(function (req, res) {
    var pathname = url.parse(req.url).pathname;
    var query = url.parse(req.url, true).query;
    var check;
    var responseData = '';
    if(pathname === '/healthcheck/ticket'){
        check = new Date().getTime();
        check = check - tickets.lastAction;
        if(check < 30000){
            responseData = "page ok";
            res.writeHead(200, {'Content-Type': 'text/plain'});
            res.end(responseData);
        }
        else{
            check = check/1000;
            responseData = 'Last action taken by the Ticket Generator was ' + check + ' seconds ago';
            res.writeHead(200, {'Content-Type': 'text/plain'});
            res.end(responseData);
        }
    }
    else{
        responseData = 'URL NOT FOUND!';
        res.writeHead(404, {'Content-Type': 'text/plain'});
        res.end(responseData);
    }
}).listen(config.eng.port, config.eng.host);