Nearly all crashes for omshell happen at an instruction pointer ending with ...6dc. Therefore I guess all crashes happen at the same source code location. Unfortunately with just the segfault line it is difficult to find out this source code line. Therefore the kernel emits one line below the segfault line a line showing the surrounding bytes of the crashing instruction (at amd64). Having this line too it is likely possible to find the exact source code line. [1] Example: [13092.694183] omshell[11741]: segfault at ... [13092.694202] Code: 64 ff ff ff c6 05 15 2f 00 ... So maybe you could at least retrieve from the log one "segfault" line with following "Code:" line? Even better would be to get a backtrace of the crash. If this system is systemd based, the simplest might be to install systemd-coredump. With this package such a backtrace is written directly to the journal. Otherwise there are other core-dump-handler available, but the core has to be analyzed separately. Kind regards, Bernhard
Thanks for the reply. The problem now is that those systems are not available anymore. I had this issue only on production. When I was testing Debian 11 with DHCPD on a small testing environment (with few dhcp clients) everything was fine. So to recreate the issue, I should clone one of our 2 DHCPDs (that now are running fine from ISC source), remove the source package and reconfigure the Debian package version... and then redeploy one of them on production. And then hope that the other server (the one running with the SRC-pkg version) will be able to do all the work, when the other dhcpd will crash because of omshell. I had a snapshot of the servers with the Debian-dhcpd-pkg, kept for testing purposes, but I had to delete them for disk space management (I kept them for a while, but 6 monts has passed from the issue's opening). I'll try to recreate a similar environment, but I don't know when I will be able to. Thanks for your support. Regards -- __________________________ Andrea Turbiglio Università degli Studi dell’Insubria Centro Sistemi Informativi e Comunicazione Servizio Telecomunicazioni - Gestione Rete Dati di Ateneo Via Valleggio, 11 22100 - COMO tel. +39 031 238 9784 fax +39 031 238 9709 webwww.uninsubria.it mailandrea.turbig...@uninsubria.it mailnetw...@uninsubria.it
