I am a beginner programmer that is trying to learn node.js using the following tutorial site
http://www.nodebeginner.org/#hello-world
I got to the point where I was trying to set up the server but got an error with the below code
var http = require("http");
http.createServer(function(request, response) {
response.writeHead(200, {"Content-Type": "text/plain"});
response.write("Hello World");
response.end();
}).listen(8888);
error:
events.js:72
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE
at errnoException (net.js:884:11)
at Server._listen2 (net.js:1022:14)
at listen (net.js:1044:10)
at Server.listen (net.js:1110:5)
at Object.<anonymous> (/Users/.........../server.js:7:4)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
any help would be appreciated
EADDRINUSE means that address is in use.
Basically, you tried to start two servers at the same time that both use port 8888. You have to stop or kill one before starting another. The other server on port 8888 could be another process running your node script, or it could be something else in the system that serves content on port 8888.
Alternatively, you can get this if you don't let the socket settle for a few seconds after terminating the old server.
A more practical answer based on this great one.
Find out what is using port 8888 with this command:
lsof -i tcp:8888
You should get something like this:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
node 86456 myName 13u IPv6 0xa6b50fb47c9c3c81 0t0 TCP *:ddi-tcp-1 (LISTEN)
Now that you know which process is in the way, KILL IT! Softly, like so:
kill -15 86456
Related
Normally in app.js i use this code on port 3000 it's work good (on my-domain.com:3000).
.
http.listen(3000, function(){
console.log('start server on port :3000');
});
then i want to use on https, so i change app.js to
http.listen(443, function(){
console.log('start server on port :443');
});
When run node app.js , it's show error
events.js:160
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE :::443
at Object.exports._errnoException (util.js:1012:11)
at exports._exceptionWithHostPort (util.js:1035:20)
at Server._listen2 (net.js:1252:14)
at listen (net.js:1288:10)
at Server.listen (net.js:1384:5)
at Object.<anonymous> (/home/admin/web/my-domain.com/public_html/app.js:28:6)
at Module._compile (module.js:541:32)
at Object.Module._extensions..js (module.js:550:10)
at Module.load (module.js:458:32)
at tryModuleLoad (module.js:417:12)
Normally i have to access to my-domain.com:3000 for user chat. So i want to know how can i access to https://www.my-domain.com for user chat ?
You have the following error message:
Error: listen EADDRINUSE :::443
[...]
This message means that the port 443 is currently in use by some process.
You can check which process is actually using the said port by executing one of the many tools for network checking (such as netstat for Windows, lsof or netstat on Linux).
Refer to the manual for those tools to achieve the correct result, based upon your operating system.
I have created a http server in node.js with the following code, and trying to run it on port 100:
var http = require("http");
http.createServer(function (request, response) {
response.writeHead(200, {'Content-Type': 'text/plain'});
response.end("Howdy");
}).listen(100);
console.log("server running on port 100");
With this, the server does not start and I am getting the following error message on the linux console:
events.js:72
throw er; // Unhandled 'error' event
^
Error: listen EACCES
at errnoException (net.js:901:11)
at Server._listen2 (net.js:1020:19)
at listen (net.js:1061:10)
at Server.listen (net.js:1135:5)
at Object.<anonymous> (/home/badhai/Desktop/mainn.js:6:4)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
But if I lift a sails.js app on port 100, it runs successfully on port 100. However, the above code runs successfully on port 8081. I want to know if I need to make any changes in the server creation method or elsewhere so that it can be made to run successfully on port 100?
The EACCES part of the error message is the key here - it means you don't have access to that port. Ports < 1024 are system reserved. It's better to use ports in the range 1024-65535
Most modern operating systems limit binding to reserved ports (less than 1024) to processes running as root (or equivalent).
If you absolutely must bind to port 100, googling around will give you a bunch of ways to do it:
https://gist.github.com/firstdoit/6389682
It's better to use ports > 1024. I'm using ports starting from 3000. But if you really want to start it on port 100 and you understand what you're doing then install setcap and just allow to bind ports <1024.
> sudo apt-get install setcap
> sudo setcap 'cap_net_bind_service=+ep' /usr/local/bin/node
NodeJS can be installed in other directory also, so better to check where it is and call above setcap command with your path.
> which node
/usr/local/bin/node
I'm new to node.js and was trying to run the following training example for setting up a basic http server on my mac (OS X Yosemite 10.10.3):
var http = require("http");
http.createServer(function (request, response) {
request.on("end", function () {
response.writeHead(200, {
'Content-Type': 'text/plain'
});
response.end('Hello HTTP!');
});
}).listen(8080);
I get the following error when executing the code:
$ node http.js events.js:85
throw er; // Unhandled 'error' event
^ Error: listen EADDRINUSE
at exports._errnoException (util.js:746:11)
at Server._listen2 (net.js:1156:14)
at listen (net.js:1182:10)
at Server.listen (net.js:1267:5)
at Object. (/Users/sumankalyan/WebstormProjects/Node-Server/http.js:25:4)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Function.Module.runMain (module.js:501:10)
Not sure if this is a localhost config issue or something else. Any help much appreciated.
Another application is using the port 8080. You can run
lsof -i :8080
to see what it is. You can also just try another port.
I trying to view a static html page at localhost, but get the following error message:
events.js:72
throw er; // Unhandled 'error' event
^
Error: listen EACCES
at errnoException (net.js:901:11)
at Server._listen2 (net.js:1020:19)
at listen (net.js:1061:10)
at Server.listen (net.js:1135:5)
at Function.app.listen (/home/phil/xProgramming/AngJS/Project/node_modules/express/lib/application.js:536:24)
at Object.<anonymous> (/home/phil/xProgramming/AngJS/Project/server.js:6:5)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
I've tried killall, but I still get the same error message.
I new to Linux and am using Ubuntu 14.04
The EACCES error normally means that you are trying to bind to a port and failing. This is probably because you are trying to bind to port 80 without root permissions. Try running node with root permissions and it should work.
sudo node server.js
or
sudo nodejs server.js
Depending on how you have Ubuntu setup.
If this is a development environment instead of running as root you should use a port greater than 1024. Typically you will find people using port 3000 for node though 8000 and 8080 are also used. Here is how I normally do this when using Express.
var port = process.env.PORT || 3000;
app.listen(port, function() {
console.log("Listening on " + port);
});
Writing a test application in Node.js running on OpenShift and it currently will not start.
This is my code:
#!/bin/env node
var http = require('http');
var ip = process.env.OPENSHIFT_NODEJS_IP;
var port = process.env.OPENSHIFT_NODEJS_PORT;
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(ip, port);
console.log('Server running');
I get the error
events.js:72
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE
at errnoException (net.js:884:11)
at Server._listen2 (net.js:1003:19)
at listen (net.js:1044:10)
at Server.listen (net.js:1104:5)
at Object.<anonymous> (/var/lib/openshift/52854c6f4382ec071400051d/app-root/runtime/repo/server.js:11:4)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
DEBUG: Program node server.js exited with code 8
Which seems to mean I can't bind to the port. I've found various information on why this might be but none of it seems relevant - it all seems related to permissions but surely the point of process.env.OPENSHIFT_NODEJS_* is I have permission to bind to it?
It means some other process is using your port process.env.OPENSHIFT_NODEJS_PORT. EACCESS would mean permission denied, not EADDRINUSE. Try changing to unused ports like 8080. You can check used ports with :
netstat -tulpn
netstat -tulpn | grep :$OPENSHIFT_NODEJS_PORT //filter by your port