Fix: Error 503 Backend Fetch Failed

Have you ever faced any Server error? Or maybe you know one or two? Well, If not then the”Error: 503 backend fetch failed” is your first encounter. The status code 503 basically means that you have an internal server error. And in a nutshell, your server is collapsed.

So, What exactly is this error? and How do you get rid of it? In today’s article, I will answer both of these questions and provide a lot of technical information to get rid of this issue.

What is Error 503 Backend fetch failed?

On a normal day, You get the Error 503 Backend fetch failed when your server is down. It typically means that any website related to this server will not show the given error. And no matter which browser you use to access it, you won’t get it. But that is on a normal day. If you are lucky enough, just refreshing your browser or Internet connection will fix this, which by my understanding you already tried.

The error 503 is an HTTP status code with status line 500. This group of HTTP codes is related to Internal Server Error. The given error code can appear in several different forms depending on your Website. Some of them are-

  • 503 Service Unavailable
  • 503 Service Temporarily Unavailable
  • HTTP Server error 503
  • HTTP Error 503
  • HTTP 503
  • Server Unavailable DNS Failure 503 Error
  • Error 503 Service Unavailable

Now, in the given scenario if you don’t own the website, worry not it will be fixed, eventually. If you do own the website, first check in with your Hosting provider. And if that end is clear as well, then you can try the given fixes below.

Why Backend Fetch Failed Error is caused?

One of the biggest reason for the error 503 Backend Fetch Failed to occur is your server not having enough memory. Other valid reasons could be the expiration of SSL certification, application pool crashing, server overload, etc. Butt in most of the cases you will get this error when the Server is either overloaded or under maintenance.

So, in a nutshell, the error 503 backend failed is related to a website’s backend. So as long as you have nothing to do with it, you can’t do much except trying a few fixes. In %80 of cases, these methods work, cause otherwise, you will have to wait!

How to fix Error 503 Backend Fetch Failed?

1. Refresh Browser

The very basic steps in these errors are to refresh your browser.  And most of the time it works as there could be a problem connecting to the server. If refreshing the browser did not help try Rebooting your PC. To cross-check whether the issue is with your PC or not, try accessing the same website on another device/network.

If you are able to access that side, then the problem is with your PC/network, and if not, then the problem is definitely with the website. At this point, all you can do is wait for the website owners to fix this issue.

2. Reboot Router

If you are using wifi to access the given website, then the problem could be related to the DNS server. And this could be fixed by rebooting your router. Simply turn off your router, wait for 30 sec and turn it on.

If none of this resolves your problem then, you can try emailing the website admin. This will get the problem into their attention and if they already knew, then they should fix it.

3. Backend Fixes

If you own a website or somehow related to the website’s backend, then you can try these two fixes.

Allocate Memory

A server with tons of request queuing up needs a lot to fulfill each request.  It is kind of same as the ROM inside our computers. Without adequate memory, the website will go down due to overload.

So if you are having 503 Backed Fetch Failed Error due to lack of memory, then allocating enough memory including varnish cache is the ideal/obvious solution.

Check Plugins

One of the most common reasons for the backend failure is Varnish Plugin.  It is one of the essential plugins used by hosting providers to increase the Website’s Speed. And whether you enabled or not it can definitely cause an error. If it’s not enabled, then enable it and if it is enabled, then contacting your Hosting firm is the solution.

4. 503 DNS failure Error

Well, DNS is something that lets you access a website via the internet by connecting your IP address to the website. And in some cases, it does fail to do so, which is why you get an error like “Website cannot Load” or “503 Backed Fetch Failure” etc.

As complex as it sounds, DNS failure can simply be restored by restarting your router. This will refresh your internet connection and DNS service will be available again. Honestly, it is not the ideal solution but if DNS failure is the case, it will definitely fix this error.

5. Try Again Later

I know this sounds weird as a fix, but trust me, most of the time this will solve your problem. As I mentioned before, the chance of getting a 503 error is highly likely when the site is overloaded. By overloaded, means too much traffic for the site to handle.

Today, any typical site has fixed traffic, if the traffic increased above the threshold, the server won’t be able to handle it, and it will collapse. So trying again later, when the crowd is gone is a better option.

Bottom Line

The Error: 503 backend Fetch Failed is a really common HTTP error, that you will often see if you spend time browsing. This error can be caused or solved in really simple ways. And if you are having this error, try these fixes to solve it. But only if you are sure that the server is not on maintenance.

Well, that concludes my article on How to Fix Error:503 Backend Fetch Failure. I hope the given information was helpful. In case of any queries feel free to comment down below.

Thanks for reading this article, God bless.

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