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--- litespeed_wiki:php:503-errors [2019/01/25 17:09]
Lisa Clarke [LSWS ''Auto Fix 503 Error'' feature] Proofreading
+++ litespeed_wiki:php:503-errors [2020/02/11 14:26] (current)
Jackson Zhang [Magento 503 error]
@@ Line 344: / Line 344: @@
   - Comment out the ''extension_dir'' line to let PHP pick a default.
+==== ''Too many open files'' error may cause 503 error ====
+If you found there are a lot of ''Too many open files!'' errors, which cause 503 errors.
+<code>
+  grep "Too many open files" error_log
+-08-01 21:58:03.511076 [INFO] [319934] [157.33.150.151:49873-1#APVH_pcrm.lidopiegade.lv:lsapi] connection to [uds://tmp/lshttpd/APVH_lidopiegade_Suea-php56.sock] on request #0, confirmed, 0, associated process: 0, running: 0, error: Too many open files!
+-08-01 21:58:03.511078 [INFO] [319934] [uds://tmp/lshttpd/APVH_lidopiegade_Suea-php56.sock] Connection error: Too many open files, adjust maximum connections to 4!
+-08-01 21:58:03.511085 [NOTICE] [319934] [APVH_lidopiegade_Sulsphp56:]: Failed to open pid file [/tmp/lshttpd/APVH_lidopiegade_Suea-php56.sock.pid]: Too many open files
+-08-01 21:58:03.511087 [ERROR] [319934] [APVH_lidopiegade_Sulsphp56:]: Failed to lock pid file for [/tmp/lshttpd/APVH_lidopiegade_Suea-php56.sock]: Too many open files
+-08-01 21:58:03.809177 [ERROR] [319934] [HTAccess] Failed to open [/home/zazzybab/public_html/girls/shannon-stewart/.htaccess]: Too many open files
+-08-01 21:58:03.810914 [ERROR] [319934] [46.51.216.186:63901] /home/zazzybab/public_html/girls/shannon-stewart/shannon-stewart-playboy-33645.jpg: open() failed, 24:Too many open files
+-08-01 21:58:05.072915 [NOTICE] [319934] [APVH_lidopiegade_Sulsphp56:]: Failed to open pid file [/tmp/lshttpd/APVH_lidopiegade_Suea-php56.sock.pid]: Too many open files
+-08-01 21:58:05.072918 [ERROR] [319934] [APVH_lidopiegade_Sulsphp56:]: Failed to lock pid file for [/tmp/lshttpd/APVH_lidopiegade_Suea-php56.sock]: Too many open files
+-08-01 21:58:05.072932 [NOTICE] [319934] [APVH_birkenfelds_Sulsphp56:]: Failed to open pid file [/tmp/lshttpd/APVH_birkenfelds_Suea-php56.sock.pid]: Too many open files
+-08-01 21:58:05.072934 [ERROR] [319934] [APVH_birkenfelds_Sulsphp56:]: Failed to lock pid file for [/tmp/lshttpd/APVH_birkenfelds_Suea-php56.sock]: Too many open files
+-08-01 21:58:05.072949 [NOTICE] [319934] [APVH_vairaksaules_Sulsphp56:]: Failed to open pid file [/tmp/lshttpd/APVH_vairaksaules_Suea-php56.sock.pid]: Too many open files
+-08-01 21:58:05.072951 [ERROR] [319934] [APVH_vairaksaules_Sulsphp56:]: Failed to lock pid file for [/tmp/lshttpd/APVH_vairaksaules_Suea-php56.sock]: Too many open files
+</code>
+You may want to check the current ulimit:
+  ulimit -n
+you may consider to increase to a much higher value like:
+  ulimit -n 3276800
+Check [[litespeed_wiki:config:increasing-os-file-descriptor-limit|this wiki]] for details.
 ==== Magento 503 error ====
 After (re)installation of LiteMage Cache extension in Magento Connect manager or enable other modules in Magento 2, Magento site may be placed in maintenancence mode and couldn't be accessed and may give 503 errors.  Please refer [[litespeed_wiki:cache:litemage:troubleshooting:connect-cache-session-cleaning-error|this]] for details.
+==== Some buggy application plugin may cause 503 error ====
+Some buggy application plugin, such as WordPress sportspress plugin used to cause 503 errors. Uninstall all or most of WordPress or other applications' plugins, then installing them back one by one may be a good approach to locate the problematic plugin.
 ==== CloudLinux Imunify360 error ====
@@ Line 376: / Line 406: @@
 The issue is fixed by disabling CloudLinux's ''i360.so''. This is a CloudLinux bug. Please be aware that it may have been fixed by the CloudLinux team by the time you read this wiki, but it was a cause of 503 errors at one time.
+==== Plesk 503 error ====
+Some versions of Plesk PHP, such as php71 and php56, have a buggy APCu module that may cause a 503 error on LSWS. Generally, only one object cache or value cache should be enabled. Enabling two or more may cause conflicts between modules.  Disabling the APCu module should fix the problem.
+Navigate to **Plesk Admin > Tools and configuration > PHP configuration > 7.1.x FastCGI application**. Unselect ''apcu'' and press the **TO ACCEPT** button.
+{{ :litespeed_wiki:php:plesk-503-disable-apcu.png?800 |}}
+==== CPanel WebDisk 503 Errors ====
+You might see some errors like the following:
+-03-12 12:14:00.324041 [INFO] [51.68.79.11:54920:proxy] connection to [127.0.0.1:2077] on request #1, confirmed, 0, associated process: 0, running: 0, error: Connection refused!
+-03-12 12:14:00.324165 [INFO] [51.68.79.11:54920:proxy] connection to [127.0.0.1:2077] on request #1, confirmed, 0, associated process: 0, running: 0, error: Connection refused!
+-03-12 12:14:00.324194 [NOTICE] [51.68.79.11:54920:proxy] Max retries has been reached, 503!
+-03-12 12:14:00.324206 [INFO] [http://127.0.0.1:2077] request force stop: too many 503 errors
+Check ''/etc/apache2/conf/httpd.conf'':
+   ProxyPass "/___proxy_subdomain_webdisk" "http://127.0.0.1:2077" max=1 retry=0
+The errors are coming from cPanel WebDisk service. If this service generates too many 503 errors, you might consider disabling it. To disable cPanel WebDisk, you can log into WHM and disable **cPanel DAV Daemon** in the **Service Manager**.
+==== chroot is Enabled in LSWS =====
+It is not recommended to use ''chroot'' at all. If enabled, it may lead to a 503 error. To fix the problem, in the LiteSpeed Web Server WebAdmin Console, navigate to **Server > General** and set **Enable chroot** to ''No''.
 ===== Advanced Troubleshooting Guide =====