Thank you Alex for your prompt feedback! Cheers, Gaetano On Mon, Nov 18, 2024 at 3:21 AM Alex Rousskov <rousskov@xxxxxxxxxxxxxxxxxxxxxxx> wrote: > > On 2024-11-17 18:41, Gaetano wrote: > > > We are running three squid proxy 5.5, > > Please note that Squid Project does not support Squid v5. I recommend > upgrading to Squid v6+ (regardless of what your Linux distribution > currently ships). > > > > on three different VMs, same > > number of CPUs (4), same memory, and same FS type (xfs) on Alma Linux > > 9. > > All servers are staged with Ansible and they all have the same squid.conf. > > > > workers 4 > > ... > > cache_dir ufs /var/spool/squid 512 16 256 > > As you probably know from that earlier thread, this combination is not > supported and is likely to trigger HTTP violations and undefined > behavior. The only supported cache_dir type for SMP Squids is rock. > > > > One of those servers (always the same) crashes with this assert: > > kid1| assertion failed: Controller.cc:930: "EX" > > kid can be from 1 to 4 > > BTW, that bogus exception text "EX" is a bug. It was fixed in Squid v6. > Squid v5.10 has a backport of that fix. > > > > Everything works fine when we remove workers as explained in an old > > post about ufs and multithreading: > > https://lists.squid-cache.org/pipermail/squid-users/2021-November/024285.html > > > > However, why don't the other two proxies suffer from the same issue? > > > > Removing /var/spool/squid/* (+ squid -z) makes things work for a > > little while, then again Empty response from the server (=> assertion > > failed: Controller.cc:930: "EX"). > > So somehow it seems related to the cache and/or the response. > > > > Any ideas that could help to understand the problem? > > I cannot help with understanding why undefined Squid behavior in an > unsupported configuration manifests itself this particular way, but I > hope that switching to a supported version and configuration helps avoid > this problem. > > > Good luck, > > Alex. > _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx https://lists.squid-cache.org/listinfo/squid-users
