ember s - Port 4200 is already in use - ember.js

I have two ember projects: project1, project 2
project1: ember s , port 4200 is working fine. I closed the project1 terminal and again tried to start ember s inside project2, when i do that, i am getting Port 4200 is already in use.
Port 4200 is already in use.
Why am i getting this error, as other instances where already killed and how to rectify it ?

Try the following,
sudo fuser -k 4200/tcp
It will kill all process belongs to port 4200.

None of the answers work on Mac so I'm posting this solution.
kill -9 $(lsof -i tcp:4200 -t)

I extended my comment as answer for windows user,
To see the 4200 is already in use or not, if so what process is holding port, run the below command
netstat -ano | findstr :4200
This will show some result like this,
TCP 0.0.0.0:4200 0.0.0.0:0 LISTENING 12784
TCP [::]:4200 [::]:0 LISTENING 12784
which will list out list of processes using 4200 port. you can find process id in the result. in the above result pid is 12784 . We need to kill this process to free port.
TaskKill.exe /F /PID 12784

The following solution works on Mac & Linux.
Try using:
ember serve --port 0
Per ember help: "Pass 0 to automatically pick an available port". (In a terminal, type ember help).
This approach can also work to run more than one ember site at the same time. It helps you find an available port as well as a different live-reload-port for each:
ember serve --port 0 --live-reload-port 0
If you get the same error in any of these cases, you can also enter the following python script at your Terminal prompt to identify an available port:
python -c 'import socket; s=socket.socket(); s.bind(("", 0)); print(s.getsockname()[1]); s.close()'
You can then specify ports you know to be available:
ember serve --port <known_port_1> --live-reload-port <known_port_2>

It's not really a solution, but I'm posting it anyway incase anyone suffers the same fate as me. All morning I've tried to boot an app on any port available, only to be met with No open port found above 0.
After a tonne of trial and error, what fixed it was rebooting the Mac. Even though it had only just done a fresh boot ¯\(ツ)/¯
UPDATE: it seems as though specifying a port and host in .ember-cli was affecting this. Oddly, if you specify the same values as command line arguments it works fine ¯_(ツ)_/¯

Related

Django redis docker: port is already allocated [duplicate]

When I run docker-compose up in my Docker project it fails with the following message:
Error starting userland proxy: listen tcp 0.0.0.0:3000: bind: address already in use
netstat -pna | grep 3000
shows this:
tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN -
I've already tried docker-compose down, but it doesn't help.
In your case it was some other process that was using the port and as indicated in the comments, sudo netstat -pna | grep 3000 helped you in solving the problem.
While in other cases (I myself encountered it many times) it mostly is the same container running at some other instance. In that case docker ps was very helpful as often I left the same containers running in other directories and then tried running again at other places, where same container names were used.
How docker ps helped me:
docker rm -f $(docker ps -aq) is a short command which I use to remove all containers.
Edit: Added how docker ps helped me.
This helped me:
docker-compose down # Stop container on current dir if there is a docker-compose.yml
docker rm -fv $(docker ps -aq) # Remove all containers
sudo lsof -i -P -n | grep <port number> # List who's using the port
and then:
kill -9 <process id> (macOS) or sudo kill <process id> (Linux).
Source: comment by user Rub21.
I had the same problem. I fixed this by stopping the Apache2 service on my host.
You can kill the process listening on that port easily with one command below :
kill -9 $(lsof -t -i tcp:<port#>)
ex :
kill -9 $(lsof -t -i tcp:<port#>)
or for ubuntu:
sudo kill -9 `sudo lsof -t -i:8000`
Man page for lsof : https://man7.org/linux/man-pages/man8/lsof.8.html
-9 is for hard kill without checking any deps.
(Not related, but might be useful if its PORT 5000 mystery) - the culprit process is due to Mac OS monterery.
The port 5000 is commonly used to serve local development servers. When updating to the latest macOS operating system, I was unable the docker to bind to port 5000, because it was already in use. (You may find a message along the lines of Port 5000 already in use.)
By running lsof -i :5000, I found out the process using the port was named ControlCenter, which is a native macOS application. If this is happening to you, even if you use brute force (and kill) the application, it will restart itself. In my laptop, lsof -i :5000 returns that Control Center is being used by process id 433. I could do killall -p 433, but macOS keeps restarting the process.
The process running on this port turns out to be an AirPlay server. You can deactivate it in
System Preferences › Sharing, and unchecking AirPlay Receiver to release port 5000.
I had same problem,
docker-compose down --rmi all (in the same directory where you run docker-compose up)
helps
UPD: CAUTION - this will also delete the local docker images you've pulled (from comment)
For Linux/Unix:
Simple search for linux utility using following command
netstat -nlp | grep 8888
It'll show processing running at this port, then kill that process using PID (look for a PID in row) of that process.
kill PID
In some cases it is critical to perform a more in-depth debugging to the problem before stopping a container or killing a process.
Consider following the checklist below:
1) Check you current docker compose environment
Run docker-compose ps. If port is in use by another container, stop it with docker-compose stop <service-name-in-compose-file> or remove it by replacing stop with rm.
2) Check the containers running outside your current workspace
Run docker ps to see list of all containers running under your host.
If you find the port is in use by another container, you can stop it with docker stop <container-id>.
(*) Because you're not under the scope of the origin compose environment - it is a good practice first to use docker inspect to gather more information about the container that you're about to stop.
3) Check if port is used by other processes running on the host
For example if the port is 6379 run:
$ sudo netstat -ltnp | grep ':6379'
tcp 0 0 127.0.0.1:6379 0.0.0.0:* LISTEN 915/redis-server 12
tcp6 0 0 ::1:6379 :::* LISTEN 915/redis-server 12
(*) You can also use the lsof command which is mainly used to retrieve information about files that are opened by various processes (I suggest running netstat before that).
So, In case of the output above the PID is 915. Now you can run:
$ ps j 915
PPID PID PGID SID TTY TPGID STAT UID TIME COMMAND
1 915 915 915 ? -1 Ssl 123 0:11 /usr/bin/redis-server 127.0.0.1:6379
And see the ID of the parent process (PPID) and the execution command.
You can also run: $ pstree -s <PID> to a visual display of the process and its related processes.
In our case we can see that the process probably is a daemon (PPID is 1) - In that case consider running: A) $ cat /proc/<PID>/status in order to get a more in-depth information about the process like the number of threads spawned by the process, its capabilities, etc'.
B) $ systemctl status <PID> in order to see the systemd unit that caused the creation of a specific process. If the service is not critical - you can stop and disable the service.
4) Restart Docker service
Run: sudo service docker restart.
5) You reached this point and..
Only if its not placing your system at risk - consider restarting the server.
In my case it was
Error starting userland proxy: listen tcp 0.0.0.0:9000: bind: address already in use
And all that I need is turn off debug listening in php storm
Most probably this is because you are already running a web server on your host OS, so it conflicts with the web server that Docker is attempting to start.
So try this one-liner before trying anything else:
sudo service apache2 stop; sudo service nginx stop; sudo nginx -s stop;
I had apache running on my ubuntu machine. I used this command to kill it!
sudo /etc/init.d/apache2 stop
I was getting the below error when i was trying to launch a new container -
listen tcp 0.0.0.0:8080: bind: address already in use.
To check which process is running on port 8080, run below command:
netstat -tulnp | grep 8080
i got the output below
[root#ip-112-x6x-2x-xxx.xxxxx.compute.internal (aws_main) ~]# netstat -tulnp | grep 8080 tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN **12749**/java [root#ip-112-x6x-2x-xxx.xxxxx.compute.internal (aws_main) ~]#
run
kill -9 12749
Then try to relaunch the container it should work
If redis server is started as a service, it will restart itself when you using kill -9 <process_id> or sudo kill -9 `sudo lsof -t -i:<port_number>` . In that case you will need to stop the redis service using following command.
sudo service redis-server stop
I upgraded my docker this afternoon and ran into the same problem. I tried restarting docker but no luck.
Finally, I had to restart my computer and it worked. Definitely a bug.
Check docker-compose.yml, it might be the case that the port is specified twice.
version: '3'
services:
registry:
image: mysql:5.7
ports:
- "3306:3306" <--- remove either this line or next
- "127.0.0.1:3306:3306"
Changing network_mode: "bridge" to "host" did it for me.
This with
version: '2.2'
services:
bind:
image: sameersbn/bind:latest
dns: 127.0.0.1
ports:
- 172.17.42.1:53:53/udp
- 172.17.42.1:10000:10000
volumes:
- "/srv/docker/bind:/data"
environment:
- 'ROOT_PASSWORD=secret'
network_mode: "host"
I ran into the same issue several times. Restarting docker seems to do the trick
A variation of #DmitrySandalov's answer: I had tomcat/java running on 8080, which needed to keep going. Looked at the docker-compose.yml file and altered the entry for 8080 to another of my choosing.
nginx:
build: nginx
ports:
#- '8080:80' <-- original entry
- '8880:80'
- '8443:443'
Worked perfectly. (The only wrinkle is the change will be wiped if I ever update the project, since it's coming from an external repo.)
At first, make sure which service you are running in your specific port. In your case, you are already using port number 3000.
netstat -aof | findstr :3000
now stop that process which is running on specific port
lsof -i tcp:3000
I resolve the issue by restarting Docker.
It makes more sense to change the port of the docker update instead of shutting down other services that use port 80.
Just a side note if you have the same issue and is with Windows:
In my case the process in my way is just grafana-server.exe. Because I first downloaded the binary version and double click the executable, and it now starts as a service by user SYSTEM which I cannot taskkill (no permission)
I have to go to "Service manager" of Windows and search for service "Grafana", and stop it. After that port 3000 is no longer occupied.
Hope that helps.
The one that was using the port 8888 was Jupiter and I had to change the configuration file of Jupiter notebook to run on another port.
to list who is using that specific port.
sudo lsof -i -P -n | grep 9
You can specify the port you want Jupyter to run uncommenting/editing the following line in ~/.jupyter/jupyter_notebook_config.py:
c.NotebookApp.port = 9999
In case you don't have a jupyter_notebook_config.py try running jupyter notebook --generate-config. See this for further details on Jupyter configuration.
Before it was running on :docker run -d --name oracle -p 1521:1521 -p 5500:5500 qa/oracle
I just changed the port to docker run -d --name oracle -p 1522:1522 -p 5500:5500 qa/oracle
it worked fine for me !
On my machine a PID was not being shown from this command netstat -tulpn for the in-use port (8080), so i could not kill it, killing the containers and restarting the computer did not work. So service docker restart command restarted docker for me (ubuntu) and the port was no longer in use and i am a happy chap and off to lunch.
maybe it is too rude, but works for me. restart docker service itself
sudo service docker restart
hope it works for you also!
I have run the container with another port, like... 8082 :-)
I came across this problem. My simple solution is to remove the mongodb from the system
Commands to remove mongodb in Ubuntu:
sudo apt-get purge mongodb mongodb-clients mongodb-server mongodb-dev
sudo apt-get purge mongodb-10gen
sudo apt-get autoremove
Let me add one more case, because I had the same error and none of the solutions listed so far works:
serv1:
...
networks:
privnet:
ipv4_address: 10.10.100.2
...
serv2:
...
# no IP assignment, no dependencies
networks:
privnet:
ipam:
driver: default
config:
- subnet: 10.10.100.0/24
depending on the init order, serv2 may get assigned the IP 10.10.100.2 before serv1 is started, so I just assign IPs manually for all containers to avoid the error. Maybe there are other more elegant ways.
I have the same problem and by stopping docker container it was resolved.
sudo docker container stop <container-name>
i solved with this sudo service redis-server stop

Website not reachable after I removed and reinstalled web deployment tool

I have been having an issue with deploying to my website management service, after following a lot of information from various forums, I came to one that said by uninstalling and reinstalling the web deployment tool solved his problem, the problem is now that both of my websites are not reachable.
After running the following command in cmd...
netstat -aon | findstr 80
Its listening on the following..
TCP [::]:80 [::]:0 LISTENING 4
But no where in the listing do i find the following TCP 0.0.0.0:80
Any help would be greatly appreciated.
Mark.
Ok I solved this particular issue with the following command...
netsh http add iplisten ipaddress=0.0.0.0
:-)

Wamp server can't bind to port 80 error

I'm having a very similar error to Getting an error when starting WAMP - "VirtualHost *:80 -- mixing * ports and non-* ports with a NameVirtualHost address is not supported, proceeding with undefined results"
I'm getting the same
Only one usage of each socket address (protocol/network address/port) is normally permitted. : make_sock: could not bind to address 0.0.0.0:80"
error message in the event logs viewer. I tried the fix of disabling skype from using port 80 however when I do that nothing comes up in the console. I am using 64 bit wamp, im in a 64 bit windows 8.1 laptop.
Edit: Problem resolved, changed Listening on 80 to 8080 in httpd.cfg
There is a menu item on the WAMPManager icon ( the one in the system tray ) called Test Port 80
You get to it by
wampmanager -> Apache -> Service -> Test Port 80
This will load a command window and show you the name of the other application that has captured port 80.
Then you have to work out what to do about it of course.
Also as far as I am aware the Windows 8 tiled version of SKYPE does not have any way of being configured to stop using port 80. But if you uninstall the Tile version of SKYPE and install the normal Windows version, that allows you to configure it so it will not attempt to use port 80 or 443.
If you really cannot find the wampmanager icon try this instead
Try this
netstat -anop TCP | find ":80"
tasklist /FI "PID eq 999" /FO TABLE /NH
replacing 999 with the PID number from the previous command that is using port 80.
Other programs can mess with this.
Are you using Skype by chance or any other program.
If you are just turn it off and then launch wamp and then launch your program.
Open Command Prompt and run netstat -ano | findstr :80
That will list all connections and their process ID (on the right) that are using port 80. Match them with process IDs in your task manager and close them.

I only can connect to my nginx server from local computer

First of all, please excuse my low-level English.
I'm not native English speaker..
but I'll try to explain well as far as possible.
I really have no idea about this situation.
I thought that it's iptables problem.. but it seems not.
I'm getting a server hosting(CentOS).
I installed Nginx + Django and nginx uses 8080 port.
A domain is connected to the server.
When I executed "wget [domain]:8080/[app name]/" in the server,
it works.
Of course, "wget 127.0.0.1:8080/[app name]/" has no problem.
(wget [server ip]:8080/[app name]/, either)
However, from other computers, connecting failed.
I checked my firewall setting.
I executed these commands.
iptables -I INPUT -p tcp --dport 8080 -j ACCEPT
iptables -I OUTPUT -p tcp --sport 8080 -j ACCEPT
iptables -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT
/etc/init.d/iptables restart
I don't really understand all options of commands and I think there were useless commands, but I just tried all googled iptables settings.
But still I cannot connect to my server.
What should I check, first?
I don't know if this is important, but I am adding to this post.
On 80 port, an apache server is running.
It works fine, I can connect to apache from other computers.
There is DB connecting issue, (PHP to MySQL) but I think that it is just PHP coding bug.
Thank you for reading this question.
I tried to stop my firewall, and It worked.
So the problem is on my iptables setting.
I had allowed 8080 port, but I think there was a mistake on the settings. I regret that I didn't read and study settings carefully.
I flushed all setting, and restart server. All looks fine.

Local Django website won't load in browser

I'm guessing there's a very simple solution to this, but I searched every forum and setup guide and can't figure it out:
I built a Django/CentOS-6.3 environment on my local server (using VirtualBox and Vagrant). When I startup my server in the vagrant terminal with 'python manage.py runserver [::]:8000' it starts up with no errors.
Validating models...
0 errors found
May 31, 2013 - 13:56:15
Django version 1.5.1, using settings 'mysitename.settings'
Development server is running at http://[::]:8000/
Quit the server with CONTROL-C.
However, when I try to navigate to 'http://127.0.0.1:8001' in my browser (I set up port forwarding from port 8000 to port 8001 in my Vagrantfile), the browser just hangs for 5 minutes until it times out, then it returns the message:
> The connection was reset
> The connection to the server was reset while the page was loading.
> ...
This is the exact same message I get from the browser even after I shut down my local server. My computer obviously recognizes this as a forwarded port, because any other port I try (such as 8000) instantly returns an error saying that it can't establish a connection to the server at 127.0.0.1:8000.
With regard to the server files, I have done many similar setups with Django/Ubuntu in the past and have never had any issues, but there must be something different about Django/CentOS that is causing this to happen (or maybe I made a mistake someone in one of my server files). I have followed guides for setting up Django & PostgreSQL on CentOS, too, but to no avail. I'll comment some of the files I have created/edited below.
If anyone has a solution, or even has advice on where to start looking for errors, I would very much appreciate it.
If your network is configured correctly and your django application with
python manage.py runserver 0.0.0.0:8000
and you still can't access your django app from the VM host there is almost certainly a firewall issue. The solution above is good if you are running iptables.
I deployed CentOS 7 on a virtualbox VM from a Windows 7 host. I didn't know that this distribution uses firewalld, not iptables to control access.
if
ps -ae | grep firewall
returns something like
602 ? 00:00:00 firewalld
your system is running firewalld, not iptables. They do not run together.
To correct you VM so you can access your django site from the host use the commands:
firewall-cmd --zone=public --add-port=8000/tcp --permanent
firewall-cmd --reload
Many thanks to pablo v for pointing this out in the post "Access django server on virtual Machine".
the host's "127.0.0.1" is not the same as the guest's "127.0.0.1". Per default the command
python manage.py runserver
listens only to the guest's localhost. You should be able to test it from within the vm (use "vagrant ssh" to login) and run
curl -I http://127.0.0.1:8000/
The host as a different IP. To access the development server from the host you have to start it without ip restriction:
python manage.py runserver 0.0.0.0:8000
Yes:
python manage.py runserver [::]:8000
should be the same. But that's IPv6 syntax AFAIK. Are you sure that the "manage.py runserver" command supports IPv6 by default? I've never used ipv6 addresses w/ django, but looking at the source (https://github.com/django/django/blob/master/django/core/management/commands/runserver.py) there seams to be a flag that the default to False ("--ipv6"). Perhaps that's the "real" problem?
Regards,
For a similar problem,
This command worked like a charm for me
python manage.py runserver [::]:8001
Check your iptables, and stop it. Ubuntu commonly does not open the iptables when it starts.