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--- litespeed_wiki:php:503-errors [2019/03/19 20:30]
Jackson Zhang [Plesk 503 error]
+++ 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 383: / Line 413: @@
 {{ :litespeed_wiki:php:plesk-503-disable-apcu.png?800 |}}
-==== CPanel webdisk 503 errors ====
+==== 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!
@@ Line 390: / Line 420: @@
 -03-12 12:14:00.324206 [INFO] [http://127.0.0.1:2077] request force stop: too many 503 errors
-when checking /etc/apache2/conf/httpd.conf
+Check ''/etc/apache2/conf/httpd.conf'':
    ProxyPass "/___proxy_subdomain_webdisk" "http://127.0.0.1:2077" max=1 retry=0
-It is cpanel webdisk service. If this webdisk service generated too many 503 errors, you might consider to disable it. To disable cpanel WebDisk, you can login WHM and disable ''cPanel DAV Daemon'' in Service Manager.
+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 =====