My CentOS 5.7 server randomly restarts. I've found the following in /var/log/messages:

Jan 24 01:54:53 m38501 dhcpd: DHCPINFORM from 80.xxx.xxx.xxx via eth0
Jan 24 01:54:53 m38501 dhcpd: DHCPACK to 80.xxx.xxx.xxx (00:13:3e:4c:56:87) via eth0
Jan 24 01:54:53 m38501 kernel: r8169: peth0: link up
Jan 24 01:55:24 m38501 last message repeated 53 times
Jan 24 01:56:59 m38501 syslogd 1.4.1: restart.

And then it just reboots the server. It's running Xen (2.6.18-274.12.1.el5xen). Anyone knows what can cause this?


Check your hardware; random restarts could be cause by motherboard (there can be destended capacitor), RAM modules (often it cause a kernel panic) or by power supply.

  • Thanks, I have informed my hosting provider and they agree it could be a hardware failure. They will put my drives into another server tomorrow. Let's see if that solves the problem. – Devator Jan 24 '12 at 20:44
  • It did solve the problem. It was a hardware failure. – Devator Mar 9 '12 at 8:18

Maybe that's time to upgrade to something new. 2.6.18 is very old. Why don't you upgrade to Xen 4.x, and the Debian backported kernel 3.1?

  • It's a kernel from 2010. I won't call it very old. Xen 3.4.3 is also a very stable release. – Devator Jan 24 '12 at 19:45
  • kernel 2.6.18 is stable kernel from RHEL, it shoudln't be a problem – stderr Jan 24 '12 at 20:07

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