Tested solutions to solve error 503 first byte timeout right now
by Megan Moore
Megan is a Windows enthusiast and an avid writer. With an interest and fascination in all things tech, she enjoys staying up to date on exciting new developments… read more
Published on September 15, 2022
Reviewed by
Alex Serban
After moving away from the corporate work-style, Alex has found rewards in a lifestyle of constant analysis, team coordination and pestering his colleagues. Holding an MCSA Windows Server… read more
- Error 503 first byte timeout occurs when an origin does not send a response in the timeframe set for the first byte timeout.
- By default, the first byte timeout is automatically set to 15 seconds but this can be adjusted.
- This error occurs on websites that use Fastly content delivery network (CDN) services.
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There are many variations of the dreaded error 503 that can appear while accessing websites. Users report receiving error 503 first byte timeout when using Fastly websites. Keep reading for 5 quick and easy ways to fix this issue.
Fastly is a content delivery network (CDN) service that provides edge computing services, security, cloud storage, and more for big-name companies. The service is designed to make viewing popular websites and businesses online run seamlessly and quickly.
Read on to find out how to solve error 503 first byte timeout. If you’re receiving HTTP Error 503: service is unavailable, we offer solutions for that as well.
What is error 503 first byte timeout?
Error 503 first byte timeout errors when a server or origin does not respond in time for the first byte timeout. The first byte timeout is set to 15 seconds by default, so if the server does not send a response in that time, then the error will occur.
Users mostly encounter this error on websites powered by Fastly, a cloud service platform for many eCommerce sites and companies. Some of these websites include Ticketmaster, PayPal, Github, and more.
How do I fix error 503 first byte timeout?
1. Use a different browser
Not every browser may be compatible with a Fastly site and as a result, may cause the error 503 first byte timeout. Fastly recommends using the latest versions of Google Chrome, Mozilla Firefox, and Apple Safari.
We suggest using Opera Browser, which also operates with Fastly. Opera can cache large files for more demanding downloads and for optimized speed and performance. The browser also has a built-in VPN and ad-blocker for top-notch security while browsing.
Opera
Try using Opera Browser for a fast and secure browsing experience.
2. Update your browser
- Open your browser and access the menu in the top right or left corner then select Settings.
- Click on About.
- Select Check for updates if your browser does not automatically check.
- Update browser if available.
An outdated browser can lead to a number of issues and errors with any site, including error 503. Ensure that you’re using the latest version of your default browser by checking for any updates.
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3. Clear browser data
- Open your browser and access the menu in the top right or left corner then select Settings.
- Select Privacy & security.
- Click Clear browsing data.
- Ensure all data elements are checked then select Clear data.
If you haven’t cleared your browser data like its cache or history in a while then it may lead to issues. Clear the cache to get rid of any corrupted files and fix error 503 first byte timeout.
4. Extend the first byte timeout
- Login to Fastly and go to the Home page.
- Search for your service using ID, name, or configuration then click Edit configuration.
- On the Domains page, click on the Origins link.
- Locate the host then select Advanced options.
- Change the value next to First byte timeout in milliseconds then click Update.
Changing the first byte timeout to a longer value will allow the origin or server more time for a response and thus fix error 503 first byte timeout. If using a shield configuration, then the first byte timeout should be set to at least 60 seconds.
5. Restart your network
If error 503 persists after trying all of the above solutions, the problem may lie in your network connection. Try switching off all of your network devices and equipment and wait a few minutes, then turn it back on.
Doing this will help reconfigure the network and will communicate with your devices properly. If you’re having issues with your Windows 10 or 11 being unable to find a network, we offer a guide for that as well.
Hopefully, one of the above solutions helped you fix error 503 first byte timeout. Let us know in the comments which solution worked for you or if you have a suggestion for a different fix.
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Если вам срочно понадобилось скачать снимки со стока, а Unsplash не работает, не отчаивайтесь! Как правило, большую часть ошибок исправляют за 30-40 минут, реже — за 2-3 часа.
Вам не обязательно следить за статусом сайта с помощью сторонних решений. О состоянии фотостока можно узнать на странице Unsplash Status, отображающей данные в режиме реального времени.
Чтобы исправить сбой Unsplash, сначала нужно определить, где возникла ошибка — на стороне клиента или сервера. В первом случае баги можно исправить, во втором остаётся только ждать, сообщать о возникшей проблеме или пытаться её обойти.
Например, ошибки «на стороне клиента» может вызывать переполненный кэш браузера. Чем чаще вы смотрите видео и чем больше вкладок используете, тем быстрее происходит его заполнение, что может привести к подтормаживанию страниц или возникновению неприятных багов.
Чтобы избавиться от них, достаточно очистить кэш и снова зайти на сток.
Что делать, если на Unsplash возникла ошибка Error 503 first byte timeout?
Ошибка 503 (Error 503 first byte timeout) означает, что сервер кэширования Varnish, используемый Unsplash, не получил ожидаемого ответа (как из-за перегруженности, так и из-за ошибки) от бэкенда в течение указанного лимита времени.
Первый способ решения проблемы — подождать от получаса до нескольких часов. Ошибки такого плана хорошо заметны как пользователям, так и программистам, поэтому их быстро устраняют.
Второй способ решения проблемы - запустить приватное окно и зайти на сайт без регистрации. Третий вариант - удалить куки сайта. Последний способ используйте только в том случае, если точно помните пароль, личные данные и знаете, что делаете!
Если сбой возник из-за ошибки кэширования учётных записей, после этого вы сможете зайти на главную страницу и спокойно скачивать фотографии.
Однако вы не сможете войти в свою учётную запись до тех пор, пока работа сервера кэширования не нормализуется.
Понравилась статья? Делитесь публикацией с друзьями, пишите комментарии, подписывайтесь на Telegram, Boosty и другие страницы, чтобы первыми видеть всё самое интересное!
Stuck with Varnish Cache Server: Error 503 Service Unavailable? We can help you fix it.
The varnish cache server 503 service unavailable error occurs when the webserver is overloaded or down for maintenance.
At Bobcares, we often get requests to fix varnish cache service unavailable error, as a part of our Server Management Services.
Today, let’s see how our Support Engineers fix Error 503 Service Unavailable for our customers.
What is Varnish Cache?
Varnish cache is a program that reduces the load on the Web server by increasing the speed of a Website.
Varnish cache is written in the C program and stores content in the modules called storage backends.
By installing a varnish cache server, it connects to the HTTP and configures it to cache the contents. It acts as a mediator between the client and the webserver.
Instead of listening to all the requests by the web server, the varnish listens to all the requests.
How to fix Error 503 Service Unavailable in Varnish Cache Server?
Recently one of our customers contacted us with the 503 services unavailable error. The 503 error, regularly occurs if the back end is down or unhealthy.
Let’s discuss how our Support Engineers resolve the Varnish Cache Server error for our customers.
The error 503 means that the Varnish Cache is unable to reach the back end server. The Guru meditation error occurs when the varnish cache made too many requests and not getting any response from the server.
Initially, to fix the 503 error we check the varnish log. We use the below command to get a varnish log of 503 errors.
varnishlog -q 'RespStatus == 503' -g requestIf the varnish log shows something like, “Fetch Error no backend connection”. We check the following points.
- Check the port of the varnish cache is trying to connect
- Make sure that the HTTP service such as Apache or Nginx is working fine.
If the backend is working fine but still the Varnish Cache 503 error is there, we need to check the timeout.
This confirms that there is something wrong with the web server’s connection or some error in the Varnish Cache configuration. We fix it by the below steps.
1. We Increase the connect_timeout, first_byte_timeout and between_bytes_timeout in the backend setting.
backend default {
.host = "www.abc.com";
.connect_timeout = 5s;
.first_byte_timeout = 10s;
.between_bytes_timeout = 10s;
}The change in the connect_timeout, first_byte_timeout and between_bytes_timeout in the backend from the default VCL section to another timeout length helps to fix the 503 Service Unavailable varnish error.
2. The another reason for the 503 Service Unavailable can be due to the insufficient length of the cache tags. The default cache length size are 8192 bytes. So we set the parameter to 8192 when varnish starts.
varnishd [options] http_resp_hdr_len=8192Similarly, disabling KeepAlive in order to drop the connections will also resolve the error.
"origin": {
"address": "www.abc.com",
"disable_keepalive": true
}If the above methods don’t work, then we check the network connection and backend server’s availability.
[Need assistance in Varnish Cache Server Error – We can help you]
Conclusion
In short, The varnish cache server 503 service unavailable error occurs when the webserver is overloaded or down for maintenance. Also, we’ve discussed how our Support Engineers fix the 503 Service Unavailable error for our customers.
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Our server experts will monitor & maintain your server 24/7 so that it remains lightning fast and secure.
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var google_conversion_label = «owonCMyG5nEQ0aD71QM»;
Getting this error when i’m update product from product grid using update attributes.
Error Page:
Vivek Kumar
4,7502 gold badges21 silver badges46 bronze badges
asked Aug 22, 2018 at 13:00
Jimit BhavsarJimit Bhavsar
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1
Same error had happened to me , it is happening because of execution time out , you can increase it for magento by using ini_set() in app/bootstrap.php.
Update attributes also consumes a lot of memory depending on the number of products selected so you may also want to increase memory limit.
So, finally paste following code at the top of app/bootstrap.php
ini_set('memory_limit' , -1);
ini_set ( 'max_execution_time', 18000);
answered Aug 22, 2018 at 14:44
It’s caused by Varnish limits. Try to increase your memory_limit and max_execution_time in your php.ini and pub/.user.ini files.
If you use Fastly, navigate to admin -> stores -> configuration -> Advance -> System -> Full Page Cache, set Admin path timeout to 600, and click on «Upload VCL to Fastly», this will increase the first-byte timeout in Fastly (600 is the max).
answered Sep 28, 2022 at 15:41
