Unable to create the pid file (/run/php-fpm/php-fpm pid no such file or directory)

I installed php8.1 on ubuntu 18.04 but getting problems. I am getting 502 Bad Gateway error. The error.log is giving following error:

2022/06/30 17:48:38 [crit] 2224#2224: *1 connect() to unix:/var/run/php/php8.1-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: 127.0.0.1, server: _, request: "GET /w3_scalar.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php8.1-fpm.sock:", host: "localhost

Other details are:

$ sudo nginx -t [sudo] password for zulfi: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok nginx: configuration file /etc/nginx/nginx.conf test is successful

and

$ sudo systemctl restart php8.1-fpm ~$ sudo systemctl status nginx.service ● nginx.service - A high performance web server and a reverse proxy server Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: en Active: active (running) since Wed 2022-06-29 15:49:48 CDT; 1 day 2h ago Docs: man:nginx(8) Process: 2220 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code Process: 2010 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process Main PID: 2221 (nginx) Tasks: 13 (limit: 4915) CGroup: /system.slice/nginx.service ├─2221 nginx: master process /usr/sbin/nginx -g daemon on; master_pro ├─2224 nginx: worker process ├─2226 nginx: worker process ~$ journalctl -xe -- Unit systemd-hostnamed.service has finished starting up. -- -- The start-up result is RESULT. Jun 30 17:58:08 lc2530hz audit[20050]: AVC apparmor="ALLOWED" operation="connect Jun 30 17:58:08 lc2530hz audit[20050]: AVC apparmor="ALLOWED" operation="file_pe Jun 30 17:58:08 lc2530hz audit[20050]: AVC apparmor="ALLOWED" operation="file_pe Jun 30 17:58:08 lc2530hz audit[20050]: AVC apparmor="ALLOWED" operation="file_pe Jun 30 17:58:08 lc2530hz audit[20050]: AVC apparmor="ALLOWED" operation="file_pe Jun 30 17:58:08 lc2530hz kernel: audit: type=1400 audit(1656629888.891:266): app Jun 30 17:58:08 lc2530hz kernel: audit: type=1400 audit(1656629888.891:267): app Jun 30 17:58:08 lc2530hz kernel: audit: type=1400 audit(1656629888.891:268): app Jun 30 17:58:08 lc2530hz kernel: audit: type=1400 audit(1656629888.891:269): app Jun 30 17:58:08 lc2530hz kernel: audit: type=1400 audit(1656629888.891:270): app Jun 30 17:58:09 lc2530hz org.gnome.Nautilus[4167]: func=xmlSecCheckVersionExt:fi Jun 30 17:58:09 lc2530hz kernel: CPU4: Core temperature above threshold, cpu clo Jun 30 17:58:09 lc2530hz kernel: CPU10: Core temperature above threshold, cpu cl Jun 30 17:58:09 lc2530hz kernel: CPU4: Core temperature/speed normal Jun 30 17:58:09 lc2530hz kernel: CPU10: Core temperature/speed normal

Files information is:

/etc/php/8.1/fpm/php-fpm.conf pid = /run/php/php8.1-fpm.pid error_log = /var/log/php8.1-fpm.log include=/etc/php/8.1/fpm/pool.d/*.conf /etc/php/8.1/fpm/pool.d/www.conf: user = www-data group = www-data listen = /run/php/php8.1-fpm.sock listen.group = www-data listen = 127.0.0.1:9000

Some body please guide me how to solve this bad Gateway 502 error when I execute my php file on browser using : //localhost/w3_scalar.php

Note the above file was running on php 7.4 Zulfi.

==Jul 3 2022 @Tom Yan :First command

$ systemctl status php8.1-fpm ● php8.1-fpm.service - The PHP 8.1 FastCGI Process Manager Loaded: loaded (/lib/systemd/system/php8.1-fpm.service; enabled; vendor prese Active: active (running) since Sun 2022-07-03 16:58:24 CDT; 42min ago Docs: man:php-fpm8.1(8) Process: 2087 ExecStartPost=/usr/lib/php/php-fpm-socket-helper install /run/ph Main PID: 1921 (php-fpm8.1) Status: "Processes active: 0, idle: 2, Requests: 0, slow: 0, Traffic: 0req/se Tasks: 3 (limit: 4915) CGroup: /system.slice/php8.1-fpm.service ├─1921 php-fpm: master process (/etc/php/8.1/fpm/php-fpm.conf) ├─2079 php-fpm: pool www └─2085 php-fpm: pool www Jul 03 16:58:24 lc2530hz systemd[1]: Starting The PHP 8.1 FastCGI Process Manage Jul 03 16:58:24 lc2530hz systemd[1]: Started The PHP 8.1 FastCGI Process Manager

Second Command:

$ journalctl -bu php8.1-fpm Failed to parse boot descriptor 'u'

I found the following link: //stackoverflow.com/questions/51158830/nginx-connect-to-unix-var-run-php7-2-fpm-sock-failed-2-no-such-file-or-dir,

but it is not related to php8.1-fpm, somebody please guide me.

$ sudo ps aux | grep 'php' [sudo] password for zulfi: root 1921 0.0 0.1 454156 27524 ? Ss 16:58 0:00 php-fpm: master process (/etc/php/8.1/fpm/php-fpm.conf) www-data 2079 0.0 0.0 456452 13896 ? S 16:58 0:00 php-fpm: pool www www-data 2085 0.0 0.0 456452 13896 ? S 16:58 0:00 php-fpm: pool www zulfi 13627 0.0 0.0 210984 6284 ? Sl 17:39 0:00 /usr/lib/libreoffice/program/oosplash --writer file:///home/zulfi/Linux_Forum_SC%20Tools/nginx/nginx%20for%20php8/502%20bad%20gateway%20connect%20problem8p1.odt zulfi 13646 99.7 2.7 2006652 443460 ? Rl 17:39 25:54 /usr/lib/libreoffice/program/soffice.bin --writer file:///home/zulfi/Linux_Forum_SC%20Tools/nginx/nginx%20for%20php8/502%20bad%20gateway%20connect%20problem8p1.odt --splash-pipe=5 zulfi 15893 0.0 0.0 14432 1116 pts/0 S+ 18:05 0:00 grep --color=auto php

Also: ~$ sudo systemctl is-active php8.1-fpm.service active

@Tom Yan

$ ls -l /var/ total 52 drwxr-xr-x 2 root root 4096 Jul 3 17:03 backups drwxr-xr-x 18 root root 4096 May 27 17:18 cache drwxrwsrwt 2 root whoopsie 4096 Jun 22 16:44 crash drwxr-xr-x 86 root root 4096 Feb 18 23:31 lib drwxrwsr-x 2 root staff 4096 Apr 24 2018 local lrwxrwxrwx 1 root root 9 Feb 8 2019 lock -> /run/lock drwxrwxr-x 18 root syslog 4096 Jul 3 17:03 log drwxrwsr-x 2 root mail 4096 Jul 24 2018 mail drwxrwsrwt 2 root whoopsie 4096 Jul 24 2018 metrics drwxr-xr-x 2 root root 4096 Jul 24 2018 opt lrwxrwxrwx 1 root root 4 Feb 8 2019 run -> /run drwxr-xr-x 21 root root 4096 Apr 12 23:08 snap drwxr-xr-x 7 root root 4096 Jul 24 2018 spool drwxrwxrwt 9 root root 4096 Jul 3 18:09 tmp drwxrwxrwx 3 root root 4096 May 23 2019 w

@Tom Yan

still getting: 2022/07/03 18:48:19 [crit] 2108#2108: *6 connect() to unix:/var/run/php/php8.1-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: 127.0.0.1, server: _, request: "GET /w3_static.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php8.1-fpm.sock:", host: "localhost"

status:

$ sudo systemctl status /var/run/php/php8.1-fpm.sock [sudo] password for zulfi: Unit var-run-php-php8.1\x2dfpm.sock.mount could not be found.

My listen=listen = /run/php/php8.1-fpm.sock, should I change it to /var/run/php8.1-fpm.sock?

@Tom Yan,stat gives me error:

$stat /var/run/php/php8.1-fpm.sock stat: cannot stat '/var/run/php/php8.1-fpm.sock': No such file or directory

I have other versions also:

$ ls /etc/php 7.2 8.0 8.1

Are they creating problem? @Tom Yan ==July 4, 2022

~$ ls /var/run/ acpid.pid initctl snap.docker acpid.socket initramfs snapd-snap.socket alsa libvirt snapd.socket apache2 libvirtd.pid spice-vdagentd avahi-daemon lock sshd boltd log sshd.pid console-setup lvm sudo containerd lvmetad.pid systemd crond.pid mlocate.daily.lock teamviewerd.ipc crond.reboot mount teamviewerd.pid cups mysqld thermald dbus netns tmpfiles.d dhclient6-wlp2s0.pid network udev dhclient-wlp2s0.pid NetworkManager udisks2 dmeventd-client nginx.pid unattended-upgrades.lock dmeventd-server php user docker plymouth utmp docker.pid pppconfig uuidd docker.sock rsyslogd.pid wpa_supplicant ebtables.lock sendsigs.omit.d xtables.lock gdm3 shm gdm3.pid snapd

and

@lc2530hz:

~$ ls /var/run/php php8.1-fpm.pid

@lc2530hz:~$ Also www.conf has following addition:

listen.user = www-data

and listen = 127.0.0.1:9000 changed to:

listen = 127.0.0.1

Do I still need:

listen.owner = www-data

@Tom Yan, I am getting failed message:

$ sudo systemctl restart php8.1-fpm Job for php8.1-fpm.service failed because the control process exited with error code. See "systemctl status php8.1-fpm.service" and "journalctl -xe" for details. zulfi@lc2530hz:/etc/php/8.1/fpm/pool.d$ systemctl status php8.1-fpm.service ● php8.1-fpm.service - The PHP 8.1 FastCGI Process Manager Loaded: loaded (/lib/systemd/system/php8.1-fpm.service; enabled; vendor prese Active: failed (Result: exit-code) since Mon 2022-07-04 18:26:53 CDT; 1min 54 Docs: man:php-fpm8.1(8)

and $ journalctl -xe Jul 04 18:28:48 lc2530hz kernel: CPU6: Package temperature above threshold, cpu Jul 04 18:28:48 lc2530hz kernel: CPU1: Package temperature above threshold, cpu Jul 04 18:28:48 lc2530hz kernel: CPU7: Pack

ag

Zulfi.

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