Failed to prepare the stderr pipe error

Nirjonadda

Well-Known Member
May 8, 2013
752
28
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cPanel Access Level
Root Administrator
Some day ago we get site down but WHM/Server are online and site back to online after 45 minute. Today I get my site down for 16m but WHM loading working. Please let me know this issue.

/opt/cpanel/ea-php72/root/usr/var/log/php-fpm/error.log

Code:
[12-Dec-2017 02:06:05] ERROR: failed to prepare the stderr pipe: Too many open files (24)
/var/log/apache2/error_log

Code:
[Tue Dec 12 02:14:55.261958 2017] [proxy_fcgi:error] [pid 12779:tid 140574623467264] (70007)The timeout specified has expired: [client 162.158.165.80:32443] AH01075: Error dispatching request to : (polling), referer:
[Tue Dec 12 02:04:22.752973 2017] [access_compat:error] [pid 12780:tid 140574715787008] [client 37.1.205.15:60856] AH01797: client denied by server configuration: /home/nadda/public_html/forums
[Tue Dec 12 02:04:18.695083 2017] [proxy_fcgi:error] [pid 11036:tid 140044035610368] (9)Bad file descriptor: [client 172.69.62.8:31273] AH01075: Error dispatching request to : (reading input brigade), referer: 
[Tue Dec 12 02:04:20.332204 2017] [ssl:warn] [pid 12772:tid 140575455950976] AH01909: proxy-subdomains-ssl-default-vhost.localhost:443:0 server certificate does NOT include an ID which matches the server name
[Tue Dec 12 02:04:20.334699 2017] [:notice] [pid 12772:tid 140575455950976] ModSecurity for Apache/2.9.2 (http://www.modsecurity.org/) configured.
[Tue Dec 12 02:04:20.334722 2017] [:notice] [pid 12772:tid 140575455950976] ModSecurity: APR compiled version="1.5.2"; loaded version="1.5.2"
[Tue Dec 12 02:04:20.334729 2017] [:notice] [pid 12772:tid 140575455950976] ModSecurity: PCRE compiled version="8.32 "; loaded version="8.32 2012-11-30"
[Tue Dec 12 02:04:20.334732 2017] [:notice] [pid 12772:tid 140575455950976] ModSecurity: LUA compiled version="Lua 5.1"
[Tue Dec 12 02:04:20.334735 2017] [:notice] [pid 12772:tid 140575455950976] ModSecurity: LIBXML compiled version="2.9.1"
[Tue Dec 12 02:04:20.334738 2017] [:notice] [pid 12772:tid 140575455950976] ModSecurity: Status engine is currently disabled, enable it by set SecStatusEngine to On.
[Tue Dec 12 02:04:20.335435 2017] [suexec:notice] [pid 12772:tid 140575455950976] AH01232: suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Tue Dec 12 02:04:20.383093 2017] [ssl:warn] [pid 12773:tid 140575455950976] AH01909: proxy-subdomains-ssl-default-vhost.localhost:443:0 server certificate does NOT include an ID which matches the server name
[Tue Dec 12 02:04:20.389935 2017] [http2:info] [pid 12773:tid 140575455950976] AH03090: mod_http2 (v1.10.12, feats=CHPRIO+SHA256+INVHD+DWINS, nghttp2 1.20.0), initializing...
[Tue Dec 12 02:04:20.434537 2017] [mpm_worker:notice] [pid 12773:tid 140575455950976] AH00292: Apache/2.4.29 (cPanel) OpenSSL/1.0.2m mod_bwlimited/1.4 configured -- resuming normal operations
[Tue Dec 12 02:04:20.434600 2017] [core:notice] [pid 12773:tid 140575455950976] AH00094: Command line: '/usr/sbin/httpd'
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,884
2,254
463
Hello,

Could you review this post and let us know if it's the issue you are facing?

Thank you.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,884
2,254
463
ERROR: failed to prepare the stderr pipe: Too many open files (24)
Hello,

It's possible this relates to internal case EA-6628, where the open files limit for Apache PHP-FPM is too low on CentOS 7 servers with a high number of domains. You can use following commands as a workaround to remove the open files limit for Apache PHP-FPM:

Code:
for drop in /etc/systemd/system/ea-php{54,55,56,70,71,72}-php-fpm.service.d; do mkdir -p $drop; printf '[Service]\nLimitNOFILE=infinity\n' > $drop/open_file_limit.conf; done
systemctl daemon-reload
/scripts/restartsrv_apache_php_fpm
Let us know if this helps.

Thank you.