Why Am I Getting 'Error: listen EADDRINUSE' When Running a NodeJS Server and Making an XMLHttpRequest?

Resolving "Error: listen EADDRINUSE" while Utilizing NodeJS

Problem Description:
When attempting to run a server on port 80 and simultaneously make an XMLHttpRequest request, the "Error: listen EADDRINUSE" is encountered. This is despite browsers being able to continue browsing the internet while the server is running.

Server Implementation:

net.createServer(function (socket) {
    socket.name = socket.remoteAddress + ":" + socket.remotePort;
    console.log('connection request from: ' + socket.remoteAddress);
    socket.destroy();
  }).listen(options.port);

Request Implementation:

var xhr = new XMLHttpRequest();

xhr.onreadystatechange = function() {
    sys.puts("State: " + this.readyState);

    if (this.readyState == 4) {
        sys.puts("Complete.\nBody length: " + this.responseText.length);
        sys.puts("Body:\n" + this.responseText);
    }
};

xhr.open("GET", "http://mywebsite.com");
xhr.send();

Solution:
To resolve this issue, consider terminating the nodejs process using:

killall -9 node

Note that this command will abruptly end a system process. To verify the termination, execute:

ps ax

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