[MacPorts] #54193: squid3+launchd causes multiple runaway processes when run in daemon mode

[MacPorts]

#54193: squid3+launchd causes multiple runaway processes when run in daemon mode
------------------------+----------------------
  Reporter:  essandess  |      Owner:  jmroot
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.4.1
Resolution:             |   Keywords:
      Port:  squid3     |
------------------------+----------------------

Comment (by essandess):

 I believe I have an instance running now that exhibits the underlying
 issue.

 I have set the {{{-N}}} flag in {{{Squid.wrapper}}} and do not see the
 runaway squid processes issue this is intended to fix; however, there are
 other problems exist that I believe are related.

 '''Problem 1:''' The {{{squid.pid}}} file doesn't match the squid pid.

 '''Problem 2:''' The squid process is not responding to {{{-k}}} signals.

 '''Good thing:''' The running squid process is working fine as a proxy.

 Here's what I see:

 {{{
 $ ps -el | grep squid | grep -v grep
     0  3621     1     4004   0  20  0  2506820    912 -      Ss
 0 ??         0:00.02 /opt/local/bin/daemondo --label=Squid --start-cmd
 /opt/local/etc/LaunchDaemons/org.macports.Squid/Squid.wrapper start ;
 --stop-cmd /opt/local/etc/LaunchDaemons/org.macports.Squid/Squid.wrapper
 stop ; --restart-cmd
 /opt/local/etc/LaunchDaemons/org.macports.Squid/Squid.wrapper restart ;
 --restart-netchange --pid=fileauto --pidfile
 /opt/local/var/run/squid/squid.pid
   504  3626  3622     4104   0  20  0  2970120 473076 -      S
 0 ??        10:58.75 /opt/local/sbin/squid -s -N
   504  3639  3626     4004   0  20  0  2432784    212 -      Ss
 0 ??         0:05.76 (logfile-daemon) /opt/local/var/squid/logs/access.log
 }}}

 {{{
 $ cat /opt/local/var/run/squid/squid.pid
 74809
 }}}

 Error sending a signal to squid:

 {{{
 $ sudo squid -k rotate
 squid: ERROR: Could not send signal 30 to process 74809: (3) No such
 process
 }}}

 Permissions check:

 {{{
 $ ls -l /opt/local/var/run/squid/squid.pid
 -rw-r--r--  1 root  squid  6 May 20 21:21
 /opt/local/var/run/squid/squid.pid
 }}}

 {{{
 $ ls -ld /opt/local/var/run/squid
 drwxr-xr-x  4 squid  squid  136 May 19 06:48 /opt/local/var/run/squid
 }}}

 (Is this correct? There's a difference between the permissions on
 {{{squid.pid}}} file and the directory in which it resides.)

 '''Background info:"

 * Squid is loaded using the command {{{sudo port load squid}}}
 * I have verified that the launchd plist is loaded:

 {{{
 $ sudo launchctl list | grep -i squid
 -       0       org.squid-cache.squid-rotate.plist
 3621    0       org.macports.Squid
 }}}

 * The state of the current problem arose some time after a fresh reboot
 several days ago. The launchd plist was loaded at boot time.

 Because this issue is running in a stable state (and I have a working
 proxy), I would be able to query any additional logs that you might need.

 I've also launched squid without the {{{-N}}} flag on a separate box and
 am waiting for it to fail out with a bunch of runaway processes.

--
Ticket URL: <https://trac.macports.org/ticket/54193#comment:8>
MacPorts <https://www.macports.org/>
Ports system for macOS