Error 503 Prestashop: how and to whom should you entrust the correction of the bug problem ?

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What is behind HTTP 503 Prestashop error code?

A server can use the 503 error code to respond to HTTP requests from clients, such as web browsers. It notifies the customer if the request was successfully processed or if it requires further steps. 503 is an HTTP code that informs the client of the server failure. This message is delivered as "Service unavailable" and informs the client that the server has been temporarily unavailable. The "Retry after" field of the HTTP response can be used to specify the time and duration of service unavailability. You may find the following examples of error messages: Status Code HTTP Error 503, HTTP 503, HTTP Error 503, HTTP Ereurr 503 This Service is Unavailable 503 Error, HTTP Server Error 503, Error 503 Service Unavailable HTTP /1.1 Service unavailable, 503 Service unavailable 503 Service unavailable error, 503 Service temporarily unavailable Service unavailable - DNS failure Error 503 Maximum number of threads allowed for service reached.
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Error 503 Backend fetch failed Prestashop: cases encountered.

Please help me, I am encountering a 503 error which is difficult to understand. I tried clearing the CDN cache, but that didn't work. My host told me: To avoid this 503 error I invite you to reduce the simultaneous requests on the accommodation. They told me to look at the logs. It is possible that this is due to shared hosting. Is a VPS the solution? It was actually a CDN issue, so I disabled it. The error then turned into a 500 error. I checked the log files. It could be a slow database issue (in which case which cluster should you be running?). There are several reasons why this happens. I think it's the max_execution_time, which is currently 165. Database, Prestashop plugins going offline but I disabled one after another but nothing changes. Prestashop shared hosting couple not working. I suggested that maybe I need a virtual private server. A shared hosting account allows you to run a Prestashop. How many items are there in Prestashop? There are only 190 articles. What database size? What filling percentage? Current size 40MB. % filling. SQL database: 3 databases 800 MB, 1 database 4 GB. The site can be installed by normal FTP. It will remain online for 2 years.
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What to do if you get the error message "HTTP Error 503: temporarily overloaded" ?

The error "HTTP Error 503. Temporarily overloaded" means that your site's server is currently overloaded. Prestashop 1.x can still give you this error if there are no server overload conditions. Prestashop will use the IPs to determine if a country is blocked from accessing your site. This will redirect users to a page that returns a server load error message. This could have many consequences, including a W3C validation issue for your site or your RSS feed. Prestashop will redirect the W3C from the message that incriminates the server load to the message that blocks access to this region. However, the W3C has its IPs based primarily in the United States. It can be fixed by disabling blocking module via Prestashop IP location, or allowing additional countries for your tests. Otherwise, modify the _PS_GEOLOCATION_NO_CATALOG_ parameter in your defines.inc.php file and set it to 1. This will disable the country blocking function on the CMS catalog.
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How to fix HTTP 503 Service Unavailable error in Prestashop ?

Module compatibility is one of the most common causes of Prestashop 503 errors. You will need to disable all modules on your site to determine if this is the case. You will need an FTP client to access the Prestashop admin area, as the 503 error prevents you from accessing it. FileZilla is a good choice if you don't have one. Once your FTP client has been installed, connect to your site. Then go to the root directory of your Prestashop. If you don't know where it is, it's usually called public_html. Open this folder and navigate to the wp-content directory. There you will find a folder called plugins. It contains subdirectories for each module installed on your site (both inactive and active). Now right click on the folder containing the plugins and rename it. So that you can recognize it later, we recommend plugins.old and plugins.desactives. Prestashop will no longer be able to find your modules. These modules will be automatically disabled when this happens.
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Why Prestashop makes 503 errors: cases encountered.

I am the system administrator of a PrestaShop site. My site is now throwing 503 errors randomly after trying to migrate our database to a new MariaDB server. I would appreciate any info from anyone who knows of a monitoring service or command that can help me with this 503 error. If your web server does not receive a response from a PHPscript, the 503 error occurs. If the problem persists after restarting the web server, it could be caused by a script/AJAX call or a page blocking PHP process over time. Mod_php / mod_cgi manages PHP. You should enable mod_status to be able to see active and waiting processes (to keep track of them after an Apache restart). If your PHP is managed by php-fpm, you can use the strace command to attach the php_fpm pool to see active workers and processes.
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