How to Fix “http/1.1 Service Unavailable” Error

Fix “http/1.1 Service Unavailable” Error:

You encounter "http/1.1 service unavailable" error that appears when your PC is not able to connect to the backend of the website. This error will stop you from having direct access to the website. This issue arises because your website's or computer's network settings aren't configured properly.

In a few cases, giving it some time can turn out to be really effective. However, there are some solutions that you can apply to ensure that this problem is not related to your computer. 

Problems that Lead to This Error

The problem of service unavailable is server related and shows up when traffic requests are more than a server can handle. Other than that, there are other possible causes of this problem. 

• Conflicting web browser cache
• Wrong time and date
• Poor network connection 
• Malware and virus
• Bad DNS configuration

How to Resolve "http/1.1 Service Unavailable" Error?

If this is a server problem, then it will get resolved in some time. Once you are done dealing with all the traffic and the server load is reduced, then the web page will go back to normal. So, let's read out the solutions mentioned below to fix the backend issues. 

1) Resolve WordPress Server Unavailable Problem

This issue gets resolved with time when the traffic becomes normal. This problem may also appear if your web server is not able to communicate with the PHP scripts properly. Try to disable the scripts one at a time until you find the one which is unresponsive. You can also change the settings by using the FTP client. Below is the solution that you need to apply to resolve your problem. 

Deactivate WordPress Plugins

Some plugins can create problems with the website. You can easily turn off WordPress Plugins by applying the different steps mentioned below. 

Step 1: First of all, launch the WordPress root folder and search for the public directory. 

Step 2: Search and then select the wp-content directory. 

Step 3: You will see a folder named Plugins there. 

Step 4: You can either disable the plugins or change the name of the folder. Alternatively, you can go to the folder and change the name of individual plugins.  

This may cause the server to not recognize the plugin. If you rename it to something else, it will become recognizable. 

2) Troubleshoot Netscaler Reachability 

If you are facing this issue at the time of accessing the Unified Gateway, below are the steps that you need to follow. 

Step 1: In the first step, you need to include a service. After that, Add storefront server to it. 

Step 2: Use many monitors such as the tcp-default for testing possible connection and port issues. 

Step 3: Enable Storefront IP through the firewall for port 443. 

Step 4: After that, go to the storefront settings and match the protocol and port with the configuration of the Unified Gateway if you find that it is missing. 

HTTP.REQ.URL.PATH.SET_TEXT_MODE(IGNORECASE).STARTSWITH("/Citrix/STORE_NAME")

3) Run Windows Troubleshooter 

Windows troubleshooter can diagnose the problem and resolve the issue automatically. It is divided into different categories of your PC so you can figure out the problem. 

Step 1: Press the Windows and I simultaneously to launch settings. 

Step 2: Select the option of "Update and Security". 

Step 3: Select troubleshoot given at the left panel and then select "Additional Troubleshooters". 

Step 4: Go to Internet Connections and then select Run the troubleshooter. 

Step 5: It will begin detecting issues and ask you to fix the problems if there are any. 

4) Clear Browser Cache

Your web browser has cache files saved on the website, so it can load faster in the future. If new changes have been introduced in a browser, then old cache files can cause problems, which leads to a dysfunctioning website.

It is good to clear the cache as the browser will generate cache again whenever required. Clearing cache is different in case of every browser. However, the general method is similar. 

Step 1: First of all, launch your web browser and then navigate to Settings. 

Step 2: After that, you need to go to the Privacy section. 

Step 3: Search fr the Browsing data section and then select Clear browsing data. 

Step 4: Select Cached files and then select Clear now. 

5) Clear SSL Cache

SSL cache is responsible for protecting the data that is being exchanged on the network. This can stop data theft and prying from unauthorized party. Incorrect SSL certificates can also lead to problems with connecting to the internet. You can also try clearing the cache to fix any possibility.

Below are the steps that you need to follow to clear the SSL cache. 

Step 1: Go to the Search area of Windows and then start looking for internet Options. 

Step 2: After that, go to Content. 

Step 3: Select Clear SSL state.