APIC error on CPU0

My server suddenly went down. Looking in /var/log/messages after it rebooted, I saw:

Apr 21 20:29:05 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:30:36 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:30:52 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:34:53 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:30:36 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:30:52 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:34:53 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:35:06 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:41:33 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:51:28 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:51:39 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:53:39 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 20:55:14 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:07:54 localhost -- MARK --
Apr 21 21:10:57 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:18:38 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:23:50 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:25:20 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:31:37 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:33:32 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:35:19 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:41:34 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:43:17 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:45:20 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:47:45 localhost kernel: APIC error on CPU0: 40(40)
Apr 21 21:56:29 localhost kernel: APIC error on CPU0: 40(40)
Any idea what this is?

 

 

 

 

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