Socket error code 111

ConnectionRefusedError: [Errno 111] Connection Refused

This error indicates that the client cannot connect to the port on the server script’s system. Since you can ping the server, it should not be the case.

This might be caused by many reasons, such as improper routing to the destination. The second possibility is that you have a firewall between your client and server, which may be either on the server or the client.

There shouldn’t be any routers or firewalls that may stop the communication since, based on your network addresses, both the server and the client should be on the same Local Area Network.

Why the ConnectionRefusedError: [Errno 111] Connection refused Occurs in Python

This error arises when the client cannot access the server because of an invalid IP or port or if the address is not unique and used by another server.

The connection refused error also arises when the server is not running, so the client cannot access the server as the server should accept the connection first.

How to Solve the ConnectionRefusedError: [Errno 111] Connection refused in Python

Try to keep the receiving socket as accessible as possible. Perhaps accessibility would only take place on one interface, which would not impact the Local Area Network.

On the other hand, one case can be that it exclusively listens to the address 127.0.0.1 , making connections from other hosts impossible.

When you run the command python server.py , you will receive the message Got connection . At the same time when you run the command python client.py , you will receive a message from the server.

The DNS resolution can be the other reason behind this problem. Since the socket.gethostname() returns the hostname, an error will be returned if the operating system cannot translate it to a local address.

The Linux operating system can edit the host file by adding one line.

Use gethostbyname

Thus, you must use the identical technique on the client and server sides to access the host. For instance, you would apply the procedure described above in a client’s case.

You can also access through local hostname hostnamehost = socket.gethostname() or specific name for local host host = socket.gethostbyname(«localhost») .

Conclusion

ConnectionRefusedError in Python arises when the client cannot connect to the server. Several reasons include the client not knowing the IP or port address and the server not running when the client wants to connect.

There are several methods mentioned above to resolve this connection issue.

Zeeshan is a detail oriented software engineer that helps companies and individuals make their lives and easier with software solutions.

Источник

socket.error: [Errno 111] Connection refused [JIRA: CLIENTS-41] #375

I am using RIAK Python client for my project and RIAK amazon instance.I got this error while running my project and its related to RIAK instance.My error log is :-
Traceback (most recent call last):
File «ironjob/ai/index.py», line 36, in application
returnval = mManager.process(api)
File «ironjob/ai/ironMainManager.py», line 94, in process
return self.mUserManager.process(listitem)
File «ironjob/ai/ironUserManager.py», line 27, in process
return self.userVerification(listitem)
File «ironjob/ai/ironUserManager.py», line 62, in userVerification
self.mCacheManager.addData(BUCKET_AI, datadict[KEY_SESSID], sessionData, cacheStart=1, cacheEnd=3, timeout=60)
File «ironjob/ai/ironCacheManager.py», line 55, in addData
self.mRiakClient.addData(bucket, key, dataVals, nestedKey=innerKey, timeout=timeout)
File «ironjob/ai/ironRiakClient.py», line 53, in addData
currentData = <> if bucket.get(key).get_data() == None else bucket.get(key).get_data()
File «build/bdist.linux-x86_64/egg/riak/bucket.py», line 326, in get
File «build/bdist.linux-x86_64/egg/riak/riak_object.py», line 459, in reload
File «build/bdist.linux-x86_64/egg/riak/transports/pbc.py», line 251, in get
File «build/bdist.linux-x86_64/egg/riak/transports/feature_detect.py», line 76, in quorum_controls
File «build/bdist.linux-x86_64/egg/riak/util.py», line 61, in get
File «build/bdist.linux-x86_64/egg/riak/transports/feature_detect.py», line 95, in server_version
File «build/bdist.linux-x86_64/egg/riak/transports/pbc.py», line 178, in _server_version
File «build/bdist.linux-x86_64/egg/riak/transports/pbc.py», line 206, in get_server_info
File «build/bdist.linux-x86_64/egg/riak/transports/pbc.py», line 528, in send_msg_code
File «build/bdist.linux-x86_64/egg/riak/transports/pbc.py», line 559, in send_pkt
File «build/bdist.linux-x86_64/egg/riak/transports/pbc.py», line 113, in maybe_connect
File «build/bdist.linux-x86_64/egg/riak/transports/connection.py», line 166, in maybe_connect

File «», line 1, in connect
socket.error: [Errno 111] Connection refused

Please help me out.Thanks in advance.

The text was updated successfully, but these errors were encountered:

Connection refused means exactly what it says. Whatever port you tried to connect to, the Riak server is not listening on or is otherwise inaccessible. Possible causes/solutions:

Источник

Ошибка работы сокетов в Битрикс. Socket error [111]: Connection refused

При прохождении теста настроек Битрикса часто вылазит ошибка Socket error [111]: Connection refused, причин может быть несколько. Чтобы понять в чем именно причина, можно посмотреть логи проверки, но лучше в командной строке ввести аналогичную команду (по сути, битрикс ее выполняет).

Битрикс не видит своего домена по URL

Если наблюдается такая ошибка (ее можно посмотреть в логах проверки битрикса), то необходимо в /etc/hosts прописать 127.0.0.1 ваш_сайт и ваш.IP ваш_сайт (все с новой строчки).

Ошибка с SSL.
curl: (60) server certificate verification failed.

Еще один распространенный вариант — неправильная установка SSL сертификата. Даже если у вас сайт открывается с зеленой полоской, нужно проверить еще раз тут — https://www.sslshopper.com/ssl-checker.html или в командной строке ввести запрос на сайт через curl.

Лечить данную проблему нужно правильной установкой SSL (логично). Проблему помогает решить внесение ca-bundle к crt сертификату. Чтобы не генерировать ca-bundle, просто возьмите себе тут — https://www.namecheap.com/support/knowledgebase/article.aspx/9393/69/where-do-i-find-ssl-ca-bundle (искать по названию).

curl: (7) Failed connect to crm.domain.ru:443;
Connection refused

Это значит, что исходящее обращение блокируется. Скорее всего, порты для вашего домена закрыты. Чтоыб проверить, нужно ввести команду

Данная проблема лечится, как и писал выше, добавлением в /etc/hosts строчки 127.0.0.1 ваш_сайт и ваш.IP ваш_сайт (все с новой строчки).

Источник

socket.error: [Errno 111] Connection refused #51

when i run the Pix2Pix
«python train.py —dataroot ./datasets/facades —name facades_pix2pix —model pix2pix —which_model_netG unet_256 —which_direction BtoA —lambda_A 100 —dataset_mode aligned —use_dropout —no_lsgan»

a problem happened as follow:

model [Pix2PixModel] was created
create web directory ./checkpoints/facades_pix2pix/web.
(epoch: 1, iters: 100, time: 5.015) G_GAN: 2.485 G_L1: 36.558 D_real: 0.151 D_fake: 0.257
(epoch: 1, iters: 200, time: 4.833) G_GAN: 3.015 G_L1: 43.858 D_real: 0.045 D_fake: 0.552
(epoch: 1, iters: 300, time: 4.797) G_GAN: 2.519 G_L1: 39.296 D_real: 0.039 D_fake: 0.149
(epoch: 1, iters: 400, time: 6.720) G_GAN: 2.393 G_L1: 25.259 D_real: 0.200 D_fake: 0.504
End of epoch 1 / 200 Time Taken: 5975 sec
Traceback (most recent call last):
File «train.py», line 20, in
for i, data in enumerate(dataset):
File «/usr/local/lib/python2.7/dist-packages/torch/utils/data/dataloader.py», line 206, in next
idx, batch = self.data_queue.get()
File «/usr/lib/python2.7/multiprocessing/queues.py», line 376, in get
return recv()
File «/usr/local/lib/python2.7/dist-packages/torch/multiprocessing/queue.py», line 22, in recv
return pickle.loads(buf)
File «/usr/lib/python2.7/pickle.py», line 1382, in loads
return Unpickler(file).load()
File «/usr/lib/python2.7/pickle.py», line 858, in load
dispatchkey
File «/usr/lib/python2.7/pickle.py», line 1133, in load_reduce
value = func(*args)
File «/usr/local/lib/python2.7/dist-packages/torch/multiprocessing/reductions.py», line 68, in rebuild_storage_fd
fd = multiprocessing.reduction.rebuild_handle(df)
File «/usr/lib/python2.7/multiprocessing/reduction.py», line 155, in rebuild_handle
conn = Client(address, authkey=current_process().authkey)
File «/usr/lib/python2.7/multiprocessing/connection.py», line 169, in Client
c = SocketClient(address)
File «/usr/lib/python2.7/multiprocessing/connection.py», line 304, in SocketClient
s.connect(address)
File «/usr/lib/python2.7/socket.py», line 224, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 111] Connection refused

how to solve the problem?

The text was updated successfully, but these errors were encountered:

Источник

Generally, in python, the connection error is not something that you will face every day, but it can sometimes happen due to various reasons. One such reason is the connection Refuse. This causes the generation of ConnectionRefusedError errno 111 connection refused message. If you are facing this error message in your coding, this might help you.

What is socket error?

A socket programming in python is used to form a bidirectional communications channel. It is generally a process of making the two unrelated network nodes communicate with each other by making a connection. This connection can be made if you know the IP address of the server.

What is ConnectionError?

Whether you are someone new to the python language or not, you must be aware of the term connection error. As suggested by the name, it is a class of exception errors related to the errors generated due to issues in the connection. It is a type of socket error that is observed in many other libraries and platforms.

In python, the ConnectionError is generally referred to as an error generated by the failure in any of the internal connections that are the connection between the application and the DBMS server mediating a peer. This type of error can be caused by various failures, such as local errors caused by the errors reported directly to the user interface programs, then local and remote errors caused while trying to connect from the local communication server to the remote communication server and the server installation. These ConnectionErrors also report directly to the applications.

Types Of ConnectionError

There are mainly three subclasses of ConnectionError such as ConnectionAbortedError, ConnectionResetError, and ConnectionRefusedError. These errors generally arise when the error is raised due to the attempt the interruption in connection with the actions of peers.

The ConnectionRefusedError errno 111 connection refused is a subclass of the ConnectionError which is caused when the peer refuses the attempts for the connection between the application and the server. This type of error corresponds to errno ECONNREFUSED messages.

The ConnectionRefusedError errno 111 connection refused is generated when the initial SYN packet to the host to be connected was responded with an RST packet instead of a SYN+ACK packet. This resulted in the declination of the program on the remote computer that needed to be connected.

This type of error can cause by many libraries and computing platforms, but the solutions to this problem are similar.

The generation of the error can be understood efficiently by using an example:

As the connection has to be made from both end so it is done in two parts:

The Server script:

The client script:

These codes might seem good, but this will result in the socket.error: [Errno 111] Connection refused message.

How to solve the ConnectionRefusedError errno 111 connection refused?

As this is a connection-based error, so the errors have to be checked on both ends that is, on the client and the server end. The ConnectionRefusedError errno 111 connection refused can be resolved using one of the following reasons.

Checking the connection

• Ensure the IP address is of the client, and both servers are on the same LAN. If the servers are not on the same router or firewall, then you may face traffic blocking.
• Make sure that the port is listening to the server and if not then try “netstat -ntulp”.
• Make sure that you are accepting the connections to the server.
• Make sure you have access to the port server of the client.

Selectively restrict the listening socket

In the example for the generation of the ConnectionRefusedError by the server you can see that there is a line as follows:

host = socket.gethostname() #Get the local machine name
port = 98406 # Reserve a port for your service
s.bind((host,port)) #Bind to the port

Instead of the above code, you can try:

port = 98406 # Reserve a port for your service
s.bind(('', port)) #Bind to the port

This way, the listening socket will not be too restricted and will ensure the connection precisely on both ends.

Proper guidance to get an IP address

To avoid ConnectionRefusedError errno 111 connection refused while coding you need to make sure to get the right IP address for that you have to put the hostname and port number for the receiver end correctly.

Due to DNS resolution, the hostname might not get translated into the local address and returned properly. So instead of the usual code:

host = socket.gethostname() #Get the local machine name
port = 98406 # Reserve a port for your service
s.bind((host,port)) #Bind to the port

You can try the code below.

host = socket.gethostbyname("localhost")
s.connect((host, port))

FAQ

How do you fix a socket error?

As the ConnectionRefusedError errno 111 connection refused is a type of socket error, resolving this may help in resolving the former error.

• This error can be fixed by specifying the port number for which you can use the following code:

m SimpleHTTPServer (Port Number)

• You can also free up the port by terminating the previous programs.

What is the socket address in computer networks?

The socket address is a crucial part of establishing the connection. It is generally a combination of two identifiers, that is both IP address and port number. It is defined in a header where it is specified by a data structure.

Conclusion

The ConnectionRefusedError errno 111 connection refused is a socket error that results when there is a failure in the establishment of connection when the connection is refused. Which can later be resolved by managing the data necessary for establishing the connection.

References

1. Dizzy coding
2. GeeksforGeeks socket programming

To learn more about some common errors follow python clear’s errors section.

1. Why the ConnectionRefusedError: [Errno 111] Connection refused Occurs in Python
2. How to Solve the ConnectionRefusedError: [Errno 111] Connection refused in Python
3. Conclusion

This error indicates that the client cannot connect to the port on the server script’s system. Since you can ping the server, it should not be the case.

This might be caused by many reasons, such as improper routing to the destination. The second possibility is that you have a firewall between your client and server, which may be either on the server or the client.

There shouldn’t be any routers or firewalls that may stop the communication since, based on your network addresses, both the server and the client should be on the same Local Area Network.

Why the ConnectionRefusedError: [Errno 111] Connection refused Occurs in Python

This error arises when the client cannot access the server because of an invalid IP or port or if the address is not unique and used by another server.

The connection refused error also arises when the server is not running, so the client cannot access the server as the server should accept the connection first.

Code example:

# server code
import socket

s = socket.socket()
host = socket.gethostname()
port = 1717
s.bind((host, port))

s.listen(5)
while True:
    c,addr = s.accept()
    print("Got connection ", addr)
    c.send("Meeting is at 10am")
    c.close()

# client code
import socket

s = socket.socket()
host = '192.168.1.2'
port = 1717

s.connect((host,port))
print(s.recv(1024))
s.close

Output:

socket.error: [Errno 111] Connection refused

How to Solve the ConnectionRefusedError: [Errno 111] Connection refused in Python

Try to keep the receiving socket as accessible as possible. Perhaps accessibility would only take place on one interface, which would not impact the Local Area Network.

On the other hand, one case can be that it exclusively listens to the address 127.0.0.1, making connections from other hosts impossible.

Code example:

import socket

s = socket.socket()
host = socket.gethostname()
port = 1717
s.bind(('', port))

s.listen(5)
while True:
    c,addr = s.accept()
    print("Got connection ", addr)
    c.send("The Meeting is at 10 am")
    c.close()

import socket

s = socket.socket()
host = socket.gethostname()
port = 1717
s.bind(('', port))

s.connect((host, port))
print(s.recv(1024))
s.close()

Output:

Got connection('192.168.1.2')
The meeting is at 10 am

When you run the command python server.py, you will receive the message Got connection. At the same time when you run the command python client.py, you will receive a message from the server.

The DNS resolution can be the other reason behind this problem. Since the socket.gethostname() returns the hostname, an error will be returned if the operating system cannot translate it to a local address.

The Linux operating system can edit the host file by adding one line.

host = socket.gethostname()
port = 1717
s.bind((host,port))

Use gethostbyname

host = socket.gethostbyname("192.168.1.2")
s.bind((host, port))

Thus, you must use the identical technique on the client and server sides to access the host. For instance, you would apply the procedure described above in a client’s case.

You can also access through local hostname hostnamehost = socket.gethostname() or specific name for local host host = socket.gethostbyname("localhost").

host = socket.gethostname()
s.connect((host, port))

host = socket.gethostbyname("localhost")
s.connect((host, port))

Conclusion

ConnectionRefusedError in Python arises when the client cannot connect to the server. Several reasons include the client not knowing the IP or port address and the server not running when the client wants to connect.

There are several methods mentioned above to resolve this connection issue.

I’ve bought my first Raspberry Pi 3B+ last week and started working on my project but I seem to be stuck at this point. I’ve looked through a hundred different posts but none of the solutions seem to work for me.

Brief info on what I’m trying to accomplish:
A python script the listens for button presses needs to be started at boot (regardless of if I’m booting in headless mode or full desktop) and needs to be able to control MPD playback (python-mpd2)

I’ve tried:
— adding ‘python /home/pi/Documents/Jukebox/Listener.py’ to /etc/rc.local while enabling rc.local and making it executable
— creating a service ‘listener.service’ in the /etc/systemd/system/ folder with the following code:

[Unit]
Description=start listening to button presses
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
User=pi
WorkingDirectory=/home/pi
ExecStart=/home/pi/Documents/Jukebox/Listener.py

[Install]
WantedBy=multi-user.target

My python script is very basic and just assign the GPIO inputs, listens to changes and executes a MPD command:

#!/usr/bin/python
import RPi.GPIO as GPIO
import mpd
import time
from toggleplayback import toggleplaypauze 
GPIO.setmode(GPIO.BCM)
GPIO.setup(17,GPIO.IN,pull_up_down = GPIO.PUD_DOWN)
GPIO.add_event_detect(17, GPIO.RISING, bouncetime = 200)
GPIO.setup(18,GPIO.IN,pull_up_down = GPIO.PUD_DOWN)
GPIO.add_event_detect(18, GPIO.RISING, bouncetime = 200)
GPIO.setup(20,GPIO.IN,pull_up_down = GPIO.PUD_DOWN)
GPIO.add_event_detect(20, GPIO.RISING, bouncetime = 200)
client = mpd.MPDClient()
client.connect("localhost",6600)

def toggleplayback(self):
    status=client.status()
    print(status['state'])
    if (status['state'] == "pause"):
        client.pause(0)
    elif (status['state'] == "stop"):
        client.play(1)
    else :
        client.pause(1)

def nextsong(self):
    client.next()

def previoussong(self):
    client.previous()


GPIO.add_event_callback(17,toggleplayback)
GPIO.add_event_callback(18,nextsong)
GPIO.add_event_callback(20,previoussong)

while True:
    time.sleep(0.01)

When I test the service by enabling it and starting it, it works perfectly. However, when I restart the service is not started by default and if I check the status of the service I get the following error:

pi@raspberrypi:~ $ systemctl status listener.service    
listener.service - start listening to button presses
       Loaded: loaded (/etc/systemd/system/listener.service; enabled; vendor preset: enabled)
       Active: failed (Result: exit-code) since Sun 2019-01-13 16:04:44 CET; 42s ago
      Process: 398 ExecStart=/home/pi/Documents/Jukebox/Listener.py (code=exited, status=1/FAILURE)
     Main PID: 398 (code=exited, status=1/FAILURE)

    jan 13 16:04:44 raspberrypi Listener.py[398]:   File "/home/pi/Documents/Jukebox/Listener.py", line 14, in <module>
    jan 13 16:04:44 raspberrypi Listener.py[398]:     client.connect("localhost",6600)
    jan 13 16:04:44 raspberrypi Listener.py[398]:   File "/home/pi/.local/lib/python2.7/site-packages/mpd/base.py", line 641, in connect
    jan 13 16:04:44 raspberrypi Listener.py[398]:     self._sock = self._connect_tcp(host, port)
    jan 13 16:04:44 raspberrypi Listener.py[398]:   File "/home/pi/.local/lib/python2.7/site-packages/mpd/base.py", line 604, in _connect_tcp
    jan 13 16:04:44 raspberrypi Listener.py[398]:     raise err
    jan 13 16:04:44 raspberrypi Listener.py[398]: socket.error: [Errno 111] Connection refused
    jan 13 16:04:44 raspberrypi systemd[1]: listener.service: Main process exited, code=exited, status=1/FAILURE
    jan 13 16:04:44 raspberrypi systemd[1]: listener.service: Unit entered failed state.
    jan 13 16:04:44 raspberrypi systemd[1]: listener.service: Failed with result 'exit-code'.

I’m now officially out of ideas on what to do. If anyone can give me a new idea or an explanation about why what I’m trying to do is wrong and how I should be doing this, please advise!

Thanks