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What is the solution to the 502 Bad Gateway problem? nginx


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The first step would be to find out error details in server error logs. Once you have details about the error, the solution would to resolve something that causes this error.

Sometimes when nginx shows 502 error it may mean that your Apache is not running, sometimes it may mean that PHP script is not working and producing some error, then you need to find details of this error to know how to fix it.

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You have probably found the solution. Generally, a 502 Bad Gateway error with nginx in the context of KVS would likely mean that nginx is unable to access php-fpm. This could be temporary if the server lacks PHP workers or permanent if php-fpm is misconfigured in the web server configuration.

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