On 11 Dec 2014 14:27, "David Adams" <[email protected]> wrote: > > We are running 1.5.9 on Centos 6.5. It crashes 10 seconds (give or take a few seconds) after 1am, 5am, 9am, 1pm, 5pm and 9pm, like clockwork; let's call that CRASHTIME. Previously we'd been using 1.5.3 on the same hardware for some months without crashes. Once the crashes started we moved to 1.5.9 but they continue. If we manually restart it a minute or two before CRASHTIME it stills crashes when CRASHTIME arrives a minute or two later. > > We've looked at all cron jobs that run on the server for anything that could be causing the problem but found nothing. We've even dumped a process list every 1 second in the minutes before and after CRASHTIME and there is nothing untoward. Traffic levels don't change and besides, that it happens every 4 hours at exactly the same time suggests it's not traffic related. Presumably that also rules out any kind of malformed request or similar causing it.
I would check my ssh logs. In the absence of an on-system cron/at process doing this, I'd be looking /really/ externally :-) Perhaps disable sshd a few minutes before the "crash" and enable it a few minutes afterwards. I bet something like that (or a zabbix agent's cmd.run; or something else originating on another system) is screwing with you ... HTH, Jonathan
