What is 503 Service Unavailable Error?

A 503 Service Unavailable Error is an HTTP response status code that indicates that a server is temporarily unable to handle the request. A couple of reasons for the problem is that either the server is down for maintenance or the server might be overloaded. It’s quite a broad error message so it is difficult to zero in on the exact cause right away. This issue could lose a website a lot of clicks and revenue so it is important to sort it out as soon as possible. Read on to learn about some of the possible solutions for the problem.

How to Fix 503 Service Unavailable?

503 Service Unavailable is an error message that could be due to a variety of issues. But the basic problem is that the server is not processing the request or letting a person access the webpage. Listed below are some of the solutions that you can try out to fix the issue,

  • Reboot the server.

  • Check if the webserver is under maintenance.

  • Fix faulty firewall configurations.

  • Sift through the server-side logs.

  • Check the website’s code to fix bugs.

These are some of the possible solutions to the problem. You can try them out in the given order to fix the issue. Scroll down to get a brief on how to bring about these measures.

Reboot The Server

503 Service Unavailable error could sometimes occur due to congestion in the server chain that hosts the website. One easy way to fix the issue is by refreshing it. This can be done by restarting the webserver. If the website is hosted on multiple servers. Then you will have to restart all of them to get the server up and running again.

Check if the Web Server is Under Maintenance

Sometimes the servers are shut down when they are under maintenance. You can check if the server is down by accessing the administration settings. Under settings check the configuration options to see when automatic maintenance sessions are scheduled. You can disable this and take over control to avoid automatic updates. You can then choose when you want to update the server or when it is suitable

Fix Faulty Firewall Configurations

A firewall is essential for any website since it protects the site from hackers or DDoS attacks. Sometimes 503 Service Unavailable error can be caused by the website firewall. This could happen due to faulty firewall configurations which can block requests from a content delivery network by mistaking it for an attack. This will result in a rejection of the request and cause a 503 Service unavailable error. So it is important to make sure that your firewall configurations are in order.

Sift through the Server-Side Logs

There are two types of server-side logs, they are, application logs and server logs. Application logs recount the website’s entire history and give all the web pages requested by visitors and the servers it connected to. Server logs provide information regarding the hardware running the server and reveals details about its health and status. You need to go through both logs to check for discrepancies and sort them out to fix the error.

Check the website’s code to find bugs

Sometimes there might be faults in the website’s codes. This could result in the server incorrectly answering queries from a content delivery network. The only way to fix this issue is by going through the entire code line by line and look for bugs. This can also be done by entering the code into a development machine. The machine can go through the code and perform a debug process that will simulate the exact situation that led to the 503 Service Unavailable Error. So now that you have the cause for the problem it is easier to solve the issue.

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