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litespeed_wiki:config:understanding_500 [2018/09/12 19:43] Jackson Zhang [Different level of Rewrite rules misplaced to the wrong level] |
litespeed_wiki:config:understanding_500 [2019/01/11 18:43] Jackson Zhang [CloudLinux LVE Limit Reached] |
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| It will bring the website to 500 immediately. | It will bring the website to 500 immediately. | ||
| This is only one example. Many times, wrong PHP syntax will lead to a 500 error. | This is only one example. Many times, wrong PHP syntax will lead to a 500 error. | ||
| + | |||
| + | ===== PHP Code with wrong php configuration settings ===== | ||
| + | |||
| + | Sometimes, a 500 error may be not easy to locate. If you move ''.htaccess'' to ''.htaccess.bak'' and move ''php.ini'' to ''php.ini.bak'', and the 500 error still happens, it might mean there is something wrong in the PHP code. That can be hard to find. | ||
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| + | We experienced a case with WHMCS. Someone placed an incorrect setting in ''configuration.php'': | ||
| + | $display_errors = E_All; | ||
| + | |||
| + | ''E_All'' is an incorrect value for the PHP ''$display_errors'' setting. Rather, it is meant for the ''$error_reporting'' setting. ''$display_errors'' should be either ''true''/''false'', or ''on''/''off''. We changed it to ''true'', and that fixed the 500 error. | ||
| + | $display_errors = true; | ||
| ===== PHP Handler Not Set ===== | ===== PHP Handler Not Set ===== | ||
| Line 136: | Line 146: | ||
| ===== CloudLinux LVE Limit Reached ===== | ===== CloudLinux LVE Limit Reached ===== | ||
| When using CloudLinux, If the site is limited by memory or process limits, then the user may receive 500 errors because the server cannot execute the script. [[https://docs.cloudlinux.com/index.html?lve.html| Learn more.]] | When using CloudLinux, If the site is limited by memory or process limits, then the user may receive 500 errors because the server cannot execute the script. [[https://docs.cloudlinux.com/index.html?lve.html| Learn more.]] | ||
| + | |||
| + | For example, you might see some error like the following: | ||
| + | |||
| + | 2019-01-11 00:14:23.330946 [ERROR] [APVH_xsrvnecw_Sulsphp56:]: Failed to start one instance. Resource limit reached! | ||
| + | |||
| + | The above indicates an Error by Cloudlinux. Increasing the LVE for that user may fix the issue. | ||
| + | |||
| ===== PHP Upgrade ===== | ===== PHP Upgrade ===== | ||