The ‘http/1.1 service unavailable’ error occurs when your computer is not connecting to the backend of the website. This error prevents you from accessing the website entirely. It can be because your computer’s or the website’s network settings are not configured properly.
In some cases, simply giving it some time can be an effective solution. However, there are some solutions you can try from your end to verify the error is not related to your PC. Stick with us to know more about how you can fix this issue.
Possible Causes of the Error
The ‘service unavailable’ error is usually server related and appears when there are more traffic requests than the server can handle. Apart from this, there are also other probable causes for this issue.
How to Fix the “http/1.1 Service Unavailable” Error?
If it is a server-side issue, it’ll probably get resolved on its own after some time. When all the traffic is dealt with and the server load decreases, the web page will be back to normal. As such, the first few fixes detail what you can do to fix it on the backend, whereas the rest detail what you can do as a normal user.
Fix WordPress Service Unavailable Error
The issue usually automatically resolves with time after the website traffic becomes normal. This may also occur if your web server can’t communicate with the PHP scripts properly.
Try disabling the scripts one at a time until you find the unresponsive script. You can use the FTP client to change the settings. Here’s another solution you can try to solve the issue :
Deactivate Conflicting WordPress Plugins
Some plugins can cause conflict with the website. You can disable them by following these steps.
This will cause the server to not recognize the plugin at all. Try renaming them to something easily recognizable.
Check Application Crash Logs
The HTTP error may happen if the server itself has crashed and cannot take any requests. You can check your application and system’s logs in the Event Viewer program to check the cause of that crash.
Normally, the most probable cause is a highly busy website. The default maximum requests queue is 1000. If the server reaches this capacity, it will show users a ‘service unavailable’ error.
Troubleshoot Netscaler Reachability
If you’re facing this error when accessing the Unified Gateway, the following steps will be helpful:
Run Windows Troubleshooter
Thewindows troubleshootercan pinpoint a problem and fix the issue automatically. It is divided into specific categories of the computer so you can easily figure out the issue.
Reset Network Stack
You can also try resetting your computer network stack to overcome this issue. The network stack includes your computer system’s DNS cache, IP subnet mask, and IP protocol settings. You can clear your computer’s network stack by following these steps:
Clear Browser Cache
Your internet browser saves cache files of websites so it can load that website faster in the future. If any browser has made changes, the old cache files cause conflict, resulting in a dysfunctioning website.Clearing cachesare generally a good idea as the browser will generate caches again when necessary. Clearing caches are different for every browser, but the general way is very similar.
Clear SSL Cache
The SSL certificates are responsible for protecting any data that is being exchanged in a network. It prevents data theft and prying from an unauthorized party. Incorrect SSL certificates can also cause issues with connecting to the internet. you may try clearing SSL caches to fix any possibilities.
Change DNS settings
Changing your default DNS settings can also solve this error. These steps will guide you on how to clear your default DNS settings.
Scan for Viruses and Malware
Windows has a built-in antivirus software calledWindow defenderto tackle viruses and malware. Here’s how you scan for threats on your computer using Windows defender:
you may also choose the ‘Full scan’ to do a complete scan of your system. It takes some time to complete and may even extend depending on your hard drive’s size.
Change Date and Time
A mismatched or incorrect date and time is one of the most common causes of internet connectivity issues.
You canchange your computer’s date and timeby following these steps:
You can also auto-set the date and time of your computer by turning on the ‘Set time automatically.’ However, if your date and time settings are reset every time you restart your PC, you need toreplace your CMOS battery.
