Internet error messages are very confusing, and ordinary users cannot understand strange codes.
But please don't panic, we will explain exactly what the 502 error is and what you can do if you see an error.
Every time a URL is inserted, the request passes through the gateway.
If a 502 bad gateway error occurs, the server acting as a gateway or proxy receives an invalid response from the upstream master server.
In other words, a communication failure has occurred. Although the problem cannot be solved most of the time, there are some methods you can try to solve the problem.
502 bad gateway error is not as serious as it sounds
The 502 error is one of many HTTP status codes, and it is also very common. You may also see it appear as:
- Error 502
- 502 error
- HTTP 502
- 502 service temporarily overloaded
- 502 Bad Gateway NGINX
Why do I see a 502 error?
It is very unlikely that the 502 error message appears on the website you are trying to visit.
1. DNS changes
During server migration, domains sometimes need to change the Domain Name System (DNS), which is the communication link between domain names and IP addresses. It may take several hours to fully activate.
2. The original server is not working
The server may be down, there may be a connection problem or just too much traffic.
3. The server fails
This can happen whether due to a crash or routine maintenance.
4. The firewall blocked the server transmission
A firewall is set up to prevent transmission between servers, and its main purpose is to provide protection. Sometimes, firewalls mistake secure content for malicious content and prevent it from functioning properly.
Eliminate 502 error messages
Generally, the 502 bad gateway error has nothing to do with you as a visitor to the site. However, you can try some methods to make sure that it won't help you. Try these troubleshooting tips in order, as you may solve the problem faster than expected.
1. Refresh the page
Just click the refresh button in the browser window or press F5 on the keyboard. If you are lucky, this will solve the problem, so you can return to the task at hand.
2. Start a new browser session or load the website on another browser
When starting a new session, just close all open browser windows and open a new window.
3. Restart the computer and network equipment
Sometimes, restarting can bring everything back to normal. Make sure to include network equipment such as modems and routers.
4. Clear cache and cookies
If a 502 error occurs on a site you visited previously, and the file has been saved, then clearing the cache and cookies is a wise idea. Remember, cookies will keep track of the sites you have visited, the things you like on the site, etc. The cache is equivalent to speed, so when you clear it, the load time should be faster.
This is the way to clear cache and cookies on any browser. Before you begin, please check your browser settings to ensure that your password will not be cleared during this process.
5. Change your DNS server
You may have a default server assigned by your ISP. Try to use an open DNS server, such as Google's Public DNS.
6. Contact the webmaster or your internet service provider
Notifying the right people can make a difference, especially if they don’t know the problem.
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