So, here is some more info regarding this issue. Running in debug mode.
This is what I see in browser.
WebSocket connection to 'wss://APPLICATION_HOST_ADDR/socket.io/?__sails_io_sdk_version=0.13.5&__sai…tform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=websocket' failed: WebSocket is closed before the connection is established.
sails.io.js:14 engine.io-client:socket socket error {"type":"TransportError","description":{"isTrusted":true}} +1ms
sails.io.js:14 socket.io-client:manager connect_error +2ms
sails.io.js:14 socket.io-client:manager cleanup +0ms
sails.io.js:14 socket.io-client:manager reconnect attempt error +1ms
sails.io.js:14 socket.io-client:manager will wait 5000ms before reconnect attempt +0ms
sails.io.js:14 engine.io-client:socket socket close with reason: "transport error" +3ms
sails.io.js:14 engine.io-client:socket socket closing - telling transport to close +0ms
sails.io.js:14 socket.io-client:manager attempting reconnect +5s
sails.io.js:153
Socket is trying to reconnect to Sails...
_-|>_- (attempt #128)
sails.io.js:14 socket.io-client:manager readyState closed +4ms
sails.io.js:14 socket.io-client:manager opening APPLICATION_HOST_ADDR +1ms
sails.io.js:14 engine.io-client:socket creating transport "websocket" +5s
sails.io.js:14 engine.io-client:socket setting transport websocket +1ms
sails.io.js:14 socket.io-client:manager connect attempt will timeout after 20000 +1ms
.... and it repeats
This is what I see in node app with debug on.
engine intercepting request for path "/socket.io/" +10s
engine handling "GET" http request "/socket.io/?__sails_io_sdk_version=0.13.5&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=websocket" +0ms
engine handshaking client "OqC-zDGRqL3taalGAAHu" +0ms
engine intercepting request for path "/socket.io/" +10s
engine handling "GET" http request "/socket.io/?__sails_io_sdk_version=0.13.5&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=websocket" +0ms
engine handshaking client "j1JksXLKVlXEV3PXAAHv" +1ms
engine intercepting request for path "/socket.io/" +10s
engine handling "GET" http request "/socket.io/?__sails_io_sdk_version=0.13.5&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=websocket" +0ms
engine handshaking client "qzzox6cDf_1-04T7AAHw" +0ms
engine intercepting request for path "/socket.io/" +8s
engine handling "GET" http request "/socket.io/?__sails_io_sdk_version=0.13.5&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=websocket" +0ms
engine handshaking client "cTvzzzg74BQ2aqIYAAHx" +0ms
and so on...
Please notice, that client id everytime is different. Is it normal behaviour?
On local machine client is always the same (plus output has many different messages like ping/pong and many more).
Below is what is working locally:
Local on browser:
socket.io-client:url parse http://localhost:9000 +0ms
sails.io.js:14 socket.io-client new io instance for http://localhost:9000 +10ms
sails.io.js:14 socket.io-client:manager readyState closed +2ms
sails.io.js:14 socket.io-client:manager opening http://localhost:9000 +1ms
sails.io.js:14 engine.io-client:socket creating transport "polling" +0ms
sails.io.js:14 engine.io-client:polling polling +1ms
sails.io.js:14 engine.io-client:polling-xhr xhr poll +1ms
sails.io.js:14 engine.io-client:polling-xhr xhr open GET: http://localhost:9000/socket.io/?__sails_io_sdk_version=0.13.5&__sails_io_s…owser&__sails_io_sdk_language=javascript&EIO=3&transport=polling&t=LBg-U8w +2ms
sails.io.js:14 engine.io-client:polling-xhr xhr data null +1ms
sails.io.js:14 engine.io-client:socket setting transport polling +1ms
sails.io.js:14 socket.io-client:manager connect attempt will timeout after 20000 +11ms
sails.io.js:14 socket.io-client:manager readyState opening +2ms
sails.io.js:14 engine.io-client:polling polling got data ArrayBuffer +20ms
sails.io.js:14 engine.io-client:socket socket receive: type "open", data "{"sid":"il9H5LheyH0dqXypAAAB","upgrades":["websocket"],"pingInterval":25000,"pingTimeout":60000}" +37ms
sails.io.js:14 engine.io-client:socket socket open +1ms
sails.io.js:14 socket.io-client:manager open +54ms
sails.io.js:14 socket.io-client:manager cleanup +1ms
sails.io.js:14 socket.io-client:socket transport is open - connecting +1ms
sails.io.js:14 engine.io-client:socket starting upgrade probes +4ms
sails.io.js:14 engine.io-client:socket probing transport "websocket" +1ms
sails.io.js:14 engine.io-client:socket creating transport "websocket" +0ms
sails.io.js:14 engine.io-client:polling polling +4ms
sails.io.js:14 engine.io-client:polling-xhr xhr poll +1ms
sails.io.js:14 engine.io-client:polling-xhr xhr open GET: http://localhost:9000/socket.io/?__sails_io_sdk_version=0.13.5&__sails_io_s…uage=javascript&EIO=3&transport=polling&t=LBg-UA5&sid=il9H5LheyH0dqXypAAAB +5ms
sails.io.js:14 engine.io-client:polling-xhr xhr data null +0ms
local in node
engine intercepting request for path "/socket.io/" +405ms
engine handling "GET" http request "/socket.io/?__sails_io_sdk_version=0.13.5&__sails_io_sdk_platform=browser&__sails_io_sdk_language=javascript&EIO=3&transport=polling&t=LBh4s8m" +1ms
engine handshaking client "fWxt-R1v-6pm7z9LAAAB" +1ms
engine:socket sending packet "open" ({"sid":"fWxt-R1v-6pm7z9LAAAB","upgrades":["websocket"],"pingInterval":25000,"pingTimeout":60000}) +1ms
engine:polling setting request +1ms
engine:socket flushing buffer to transport +0ms
engine:polling writing " �0{"sid":"fWxt-R1v-6pm7z9LAAAB","upgrades":["websocket"],"pingInterval":25000,"pingTimeout":60000}" +5ms
engine:socket executing batch send callback +131ms
socket.io:server incoming connection with id fWxt-R1v-6pm7z9LAAAB +0ms
socket.io:client connecting to namespace / +1ms
socket.io:namespace adding socket to nsp / +18ms
socket.io:socket socket connected - writing packet +4ms
socket.io:socket joining room /#fWxt-R1v-6pm7z9LAAAB +5ms
socket.io:client writing packet {"type":0,"nsp":"/"} +1ms
socket.io-parser encoding packet {"type":0,"nsp":"/"} +0ms
socket.io-parser encoded {"type":0,"nsp":"/"} as 0 +1ms
engine:socket sending packet "message" (0) +0ms
socket.io:socket joined room /#fWxt-R1v-6pm7z9LAAAB +0ms
engine upgrading existing transport +139ms
engine:socket might upgrade socket transport from "polling" to "websocket" +0ms
So, why it is ok on local machine but not on Amazon?
Can anyone help? 
Just starting out with Firebase (great concept BTW) and I notice in the Chrome console it reports «WebSocket is closed before the connection is established»
It still works but wondered why that might be happening — is it anything to be concerned about?
Interestingly it does state there is a successful websocket connection.
Thanks
asked Sep 14, 2012 at 9:45
This is a known issue. The Firebase client attempts to establish a real-time connection to the Firebase servers using multiple methods. If one of those methods succeeds before the Websocket does, we cancel the Websocket and you see that warning. You can safely ignore the error.
answered Sep 14, 2012 at 21:46
Andrew LeeAndrew Lee
10.1k3 gold badges46 silver badges40 bronze badges
2
I’ve been troubleshooting this issue for weeks, and can reproduce it consistently. Sometimes I get the WebSocket is closed warning, other times it’s an actual error:
WebSocket connection to ‘wss://s-usc1c-nss-214.firebaseio.com/.ws?v=5&ns=foo’ failed: WebSocket opening handshake timed out
Had a long email chain with support. They stated «it shouldn’t be that long to establish connection the way your app did» and that «it seems that this is outside the Google network, and without any further data, this is just probably just regular internet connectivity mayhem.»
But I agree with @Xi Xiao above, that «freezing for 30secs is not an eligible solution.» I’ve created a GitHub Issue detailing the problem and suggesting a couple solutions.
answered Mar 1, 2018 at 15:34
benjarwarbenjarwar
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1
This caused flakiness in my Cypress e2e tests.
As a temporary solution, I had to set defaultCommandTimeout to 35000 in Cypress config as specified in Cypress docs.
answered Jun 11, 2018 at 10:15
cbrwizardcbrwizard
932 silver badges9 bronze badges
I’m using JavaScript and the Union platform How would I go about diagnosing this problem? Many thanks.
abatishchev
97.6k86 gold badges295 silver badges432 bronze badges
asked Sep 19, 2012 at 2:37
If you go to http://jsbin.com/ekusep/6/edit and view the JavaScript console you’ll see the ‘WebSocket is closed before the connection is established’ logged. I’ve tested this in Chrome.
In this code what it means is that ws.close() was called (by user code) before the connection was even given a chance to be established.
So, the cause of this error is if code attempts to close the WebSocket connection before it’s had a chance to actually connect.
answered Sep 19, 2012 at 22:10
leggetterleggetter
15.2k1 gold badge55 silver badges61 bronze badges
7
In React you need to add this to your useEffect in return
useEffect(() => {
socket = new WebSocket(address);
return () => {
if (socket.readyState === 1) { // <-- This is important
socket.close();
}
};
answered Sep 19, 2022 at 7:10
NimaNima
5878 silver badges15 bronze badges
2
For anybody else coming in to find an answer, apart from what @leggetter has mentioned above, in my case, it turned out that I was missing the port number while establishing a connection. I was using socket.io if that helps.
http://websocket.service:8000
answered Dec 16, 2021 at 14:39
Just open the port in server
ufw enable
answered May 21, 2022 at 7:12
BK NATANIBK NATANI
151 silver badge4 bronze badges
Websockets provide a powerful way to enable real-time, bidirectional communication between a client and a server. However, sometimes the websocket connection can fail, resulting in a closed connection before the establishment. In this guide, we’ll walk you through the steps to troubleshoot and fix ‘failed websocket’ issues.
Table of Contents
- Identify the Issue
- Check Your Server Configuration
- Inspect Client-Side Issues
- Inspect Network Issues
- FAQs
Identify the Issue
Before diving into the troubleshooting process, it’s important to identify the issue causing the failed websocket. This can be done by examining the error message or logs related to the issue.
Some common error messages related to websocket failures include:
- «WebSocket connection to ‘ws://example.com/’ failed: Error during WebSocket handshake: Unexpected response code: 400»
- «WebSocket is already in CLOSING or CLOSED state.»
- «WebSocket connection failed: WebSocket opening handshake was canceled.»
These error messages can help you pinpoint the problem and apply the appropriate solution.
Check Your Server Configuration
A common cause of failed websocket connections is misconfiguration on the server-side. To fix this, follow these steps:
Step 1: Verify Websocket Support
Ensure that your server supports websockets and has the necessary modules or extensions installed. For example, for an Apache server, you may need to enable the proxy_wstunnel module:
sudo a2enmod proxy_wstunnel
sudo systemctl restart apache2
For an Nginx server, ensure that the ngx_http_websocket_module is included in your configuration.
Step 2: Examine Server Logs
Check your server logs for any error messages or warnings related to websockets. This can help you identify the root cause of the problem.
Step 3: Adjust Configuration Settings
Make sure your server configuration supports websocket connections. For example, in an Nginx configuration, you may need to add a location block to handle websocket connections:
location /websocket {
proxy_pass http://websocket_backend;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}
Inspect Client-Side Issues
Sometimes, the issue may lie on the client-side. To troubleshoot this, follow these steps:
Step 1: Check Browser Support
Ensure that the browser being used supports websockets. You can use a website like Can I use to check browser compatibility.
Step 2: Examine Browser Console
Open the browser console and check for any error messages or warnings related to websockets. This can help you identify the issue and apply the appropriate fix.
Step 3: Verify WebSocket URL
Ensure that the websocket URL being used on the client-side is correct and follows the proper format, e.g., ws://example.com/websocket.
Inspect Network Issues
Network issues can also cause websocket connections to fail. Follow these steps to troubleshoot network-related problems:
Step 1: Check Firewall Settings
Ensure that your firewall and security settings allow websocket connections. You may need to add a rule to allow connections on the port used by your websocket server.
Step 2: Test Network Connection
Test the network connection between the client and server using tools like ping or traceroute. This can help you identify any connectivity issues that may be causing the websocket failure.
Step 3: Monitor Network Traffic
Use network monitoring tools like Wireshark to inspect the network traffic between the client and server. This can help you identify any issues related to packet loss, latency, or other network problems.
FAQs
1. What is a websocket?
A websocket is a communication protocol that enables two-way communication between a client and a server over a single, long-lived connection. This allows for real-time updates and reduces the latency associated with traditional HTTP requests.
2. Why am I getting a ‘failed websocket’ error?
A ‘failed websocket’ error can be caused by a variety of issues, such as server misconfiguration, client-side problems, or network issues. You’ll need to troubleshoot the problem to identify the root cause and apply the appropriate fix.
3. How can I test my websocket connection?
You can use online tools like websocket.org Echo Test or browser developer tools to test your websocket connection and identify any issues.
4. Can I use websockets with a load balancer?
Yes, you can use websockets with a load balancer. However, you’ll need to ensure that your load balancer supports websocket connections and is properly configured to handle them.
5. Are there any alternatives to websockets for real-time communication?
Yes, there are several alternatives to websockets for real-time communication, such as Server-Sent Events (SSE), long polling, and WebRTC. Each of these technologies has its own advantages and disadvantages, depending on your specific use case.
- MDN Web Docs: Writing WebSocket client applications
- WebSocket.org: WebSocket API Documentation
- Stack Overflow: How do I troubleshoot WebSocket issues?
Websockets are a powerful tool that can make your site or project truly dynamic. With websockets, you can directly influence the visible frontend for a particular user from the backend. It’s like magic! ✨️
However, setting up websockets can be a pain, especially if you want to go with a native solution without a third-party provider like Pusher. There’s nothing wrong with using Pusher, but if you prefer to keep the number of dependencies low and have more direct control over your project, a native solution might be a better choice. For my new SEO-project, RankLetter, I decided to set up native websockets.
Here is a list of issues I faced while setting up Laravel Websockets using beyondcode/laravel-websockets, and how I solved them:
«Channels current state is unavailable» #
-
Is the WebSockets server running? You can check this by running the command
php artisan websockets:serve. If the command fails because the port is in use, it means that the server is already running. In that case, you can try to restart it using the commandphp artisan websockets:restart. -
Have you configured the SSL-related settings? You can configure these settings by setting the following variables as needed:
LARAVEL_WEBSOCKETS_SSL_LOCAL_CERT
LARAVEL_WEBSOCKETS_SSL_LOCAL_PK
LARAVEL_WEBSOCKETS_SSL_PASSPHRASEMake sure to set these variables with the correct SSL certificate and key paths, as well as the correct passphrase if necessary.
WebSocket is closed before the connection is established. #
Occasionally, the WebSocket connection may drop before it starts working properly. If this happens, you may see an error message that looks similar to this:
New connection opened for app key app.
Connection id 576531883.144427763 sending message {"event":"pusher:connection_established","data":"{"socket_id":"576957883.192427708","activity_timeout":30}"}
Connection id 576531883.144427763 closed.If you’re experiencing this issue, there are a couple of possible solutions you can try:
- Add
wssto your Echo configuration to enable secure WebSocket connections:
enabledTransports: ['ws', 'wss']- Another possible solution is to downgrade to Pusher JS version 4.4.0 by running the following command:
npm install pusher-js@4.4.0.
Firefox can’t establish a connection to the server at wss://domain.com:6001/app/abc123?protocol=7&client=js&version=7.0.0&flash=false. #
This means your WebSocket server might not be running. To check if your WebSocket server is running, follow the steps described in the first issue.
«Failed to connect to Pusher.» #
This issue may occur if you’re using TLS without setting https as the scheme in your config/broadcast.php file, or if the curl process is unable to verify the host for some reason. To fix this issue, try the following steps:
- If you’re using
useTLSin your configuration file, addhttpsasschemein yourconfig/broadcast.php. - Add the following curl options to your configuration file:
'curl_options' => [
CURLOPT_SSL_VERIFYHOST => 0,
CURLOPT_SSL_VERIFYPEER => 0,
],Context: By setting CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER to 0, you are telling cURL to skip the SSL host verification and certificate verification steps, which may be necessary if the WebSocket server is using a self-signed or invalid SSL certificate.
Here’s an example of what your config/broadcast.php file might look like after making these changes:
'pusher' => [
'driver' => 'pusher',
'key' => env('PUSHER_APP_KEY'),
'secret' => env('PUSHER_APP_SECRET'),
'app_id' => env('PUSHER_APP_ID'),
'options' => [
'cluster' => env('PUSHER_APP_CLUSTER'),
'useTLS' => true,
'encrypted' => true,
'host' => '127.0.0.1',
'port' => env('LARAVEL_WEBSOCKETS_PORT', 6001),
'scheme' => 'https',
'curl_options' => [
CURLOPT_SSL_VERIFYHOST => 0,
CURLOPT_SSL_VERIFYPEER => 0,
],
],
],Still Fighting With Websockets? #
I hope these solutions help you get your project up and running. If you’re still having issues, don’t hesitate to seek further help in the issues section of the beyondcode/laravel-websockets repository. Before posting a new issue, be sure to search through the existing ones to save time for both yourself and others. Good luck!
🙏🙏🙏
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Published 24 Oct 2020