[squid-users] squid stops replying

[Amos Jeffries]

On 23/08/17 20:15, Vieri wrote:
> Hi,
> 
> After a long time working correctly, Squid stops working all of a sudden.
> 
> No new requests/replies show up in the logs. Complete silence.
> 
> If I issue "squid -k reconfigure" I get this message in cache.log:
> Set Current Directory to /var/cache/squid
> 
> If I set "debug_options rotate=1 ALL,9" and run "squid -k reconfigure" twice then I get this in cache.log:
> 
> 2017/08/23 07:54:32.676| 21,3| tools.cc(610) enter_suid: enter_suid: PID 17797 taking root privileges
> 2017/08/23 07:54:32.676| 13,3| mem.cc(473) Report: Memory pools are 'on'; limit: 5.000 MB
> 2017/08/23 07:54:32.676| Set Current Directory to /var/cache/squid
> 2017/08/23 07:54:32.676| 21,3| tools.cc(543) leave_suid: leave_suid: PID 17797 called
> 2017/08/23 07:54:32.676| 21,3| tools.cc(565) leave_suid: leave_suid: PID 17797 giving up root, becoming 'squid'
> 2017/08/23 07:55:01.605| 21,3| tools.cc(610) enter_suid: enter_suid: PID 17927 taking root privileges
> 2017/08/23 07:55:01.605| 13,3| mem.cc(473) Report: Memory pools are 'on'; limit: 5.000 MB
> 2017/08/23 07:55:01.605| Set Current Directory to /var/cache/squid
> 2017/08/23 07:55:01.605| 21,3| tools.cc(543) leave_suid: leave_suid: PID 17927 called
> 2017/08/23 07:55:01.605| 21,3| tools.cc(565) leave_suid: leave_suid: PID 17927 giving up root, becoming 'squid'
> 
> However, any attempt to browse the web leads to nothing new in the logs.

At ALL,9 that is a sign of major trouble. The log data is not going 
where it should be. Please check your squid.conf that it is not sending 
cache_log directive to /dev/null, a pipe or something.


> 
> Finally, stopping the squid service fails. I can list the squid processes:
> 
> # ps -ae | grep squid
> 4439 ?        05:29:57 squid
> 9059 ?        00:00:00 squid
> 9160 ?        00:00:00 squid
> 9162 ?        00:11:42 squid
> 9206 ?        00:00:00 squid
> 9208 ?        00:02:04 squid
> 9254 ?        00:00:00 squid
> 9257 ?        00:00:28 squid
> 9313 ?        00:00:00 squid
> 9315 ?        00:00:55 squid
> 

That seems a lot. What exactly are those processes each doing?
  "ps aux | grep squid" should show the process roles.

If you run "squid -k shutdown ; squid -k shutdown" do they all fully stop?
(exactly that command, shutdown twice in a row)

Once Squid is fully stopped, start it again. Is the problem resolved 
when it comes back up?

Amos