Re: Missing cache files

[Odhiambo Washington <odhiambo@xxxxxxxxx>]

On 17 December 2016 at 15:17, Garri Djavadyan <garryd@xxxxxxxxx> wrote:

On 2016-12-17 15:41, Odhiambo Washington wrote:

Hi,

I keep seeing something that I think is odd. Squid has been exiting on
signal 6, and I keep seeing this:

root@gw:/usr/local/openssl # tail -f /opt/squid-3.5/var/logs/cache.log
2016/12/17 13:38:32| DiskThreadsDiskFile::openDone: (2) No such file
or directory
2016/12/17 13:38:32|    /opt/squid-3.5/var/cache/00/26/0000264D
2016/12/17 13:40:24| DiskThreadsDiskFile::openDone: (2) No such file
or directory
2016/12/17 13:40:24|    /opt/squid-3.5/var/cache/00/3B/00003B56
2016/12/17 13:42:34| DiskThreadsDiskFile::openDone: (2) No such file
or directory
2016/12/17 13:42:34|    /opt/squid-3.5/var/cache/00/6B/00006B0D
2016/12/17 13:43:36| DiskThreadsDiskFile::openDone: (2) No such file
or directory
2016/12/17 13:43:36|    /opt/squid-3.5/var/cache/00/00/00000050
2016/12/17 13:44:25| DiskThreadsDiskFile::openDone: (2) No such file
or directory
2016/12/17 13:44:25|    /opt/squid-3.5/var/cache/00/AF/0000AFF1

So, what could be making the files disappear?

Hi,

(Reply from Amos Jeffries from http://bugs.squid-cache.org/show_bug.cgi?id=4367#c2)

This is Squid *detecting* complete absence of disk files. Not causing
corruption.

Please check if you have multiple Squid instances running and accessing the
same cache_dir. That includes multiple workers using the same ufs/aufs/diskd
cache_dir configuration line.

Also whether swap.state for that cache_dir is being correctly and completely
written out to disk on shutdown or restart. Using an outdated swap.state
file can also lead to these warnings.

The last paragraph explains your issue. The signal 6 (abort) forces Squid worker to terminate immediately (to avoid all required shutdown procedures) and leave core dump. You can find a reason for abort in cache.log.


Garri

Hi Garri,

So, checking, I don't see swap.state being written to disk and there is no core dump either.

There is no directive in my squid.conf to suppress the two.

--

Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223
"Oh, the cruft."

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