_http_server.js:192 throw new RangeError(`Invalid status code: ${statusCode}`);
<p>This is my code: </p>

<pre><code>var express = require('express');
var http = require('http');
var redis = require('redis');
var url = require('url');
var client = redis.createClient().setMaxListeners(0);

var app = express();
app.set('port', 3000);

app.get('/*', function(req, res) {
  var key = url.parse(req.url).pathname;
  client.on('connect', function() {
    console.log('connected to redis!');
  });
  client.get(key, function(err, reply) {
    if( reply == null) {
      client.set(key, 1);
      client.expire(key, 300);
      res.send('1');
    }
    else {
      client.incr(key, function(err, reply) {
        console.log('increment value: ' + reply);
        res.sendStatus(reply);
      });
    }
  });

});


http.createServer(app).listen(app.get('port'), function() {
  console.log('listening');
});
</code></pre>

<p>This is my output when I run the file ($ node test.js):
I tried this on my ubuntu machine and it perfectly works. This is what I get on my mac. Could someone explain me why this is happening. Any help would be appreciated.</p>

<pre>
listening
increment value: 2
_http_server.js:192
    throw new RangeError(`Invalid status code: ${statusCode}`);
    ^

RangeError: Invalid status code: 2
    at ServerResponse.writeHead (_http_server.js:192:11)
    at ServerResponse._implicitHeader (_http_server.js:157:8)
    at ServerResponse.OutgoingMessage.end (_http_outgoing.js:559:10)
    at ServerResponse.send (/Users/sharath/webapps/docker/node_modules/express/lib/response.js:209:10)
    at ServerResponse.sendStatus (/Users/sharath/webapps/docker/node_modules/express/lib/response.js:346:15)
    at Command.callback (/Users/sharath/webapps/docker/test.js:24:13)
    at normal_reply (/Users/sharath/webapps/docker/node_modules/redis/index.js:714:21)
    at RedisClient.return_reply (/Users/sharath/webapps/docker/node_modules/redis/index.js:816:9)
    at JavascriptRedisParser.returnReply (/Users/sharath/webapps/docker/node_modules/redis/index.js:188:18)
    at JavascriptRedisParser.execute (/Users/sharath/webapps/docker/node_modules/redis-parser/lib/parser.js:415:12)
</pre>