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. When it crashes the haproxy process just disappears. Nothing in the haproxy log, or system log. I do realise that it's probably something else on the server that is causing it, but I guess that haproxy shouldn't die regardless. 1.5.9 was compiled from source. We're using OpenVZ, which we've been using reliably for years:
vzctl-core-4.6.1-1.x86_64vzkernel-2.6.32-042stab083.2.x86_64 OpenVZ is not anywhere close to any limits and shows no failures. Happy to provide any further information to help diagnose the problem.
