/etc/acpi/events/power.conf in CentOS6 is generally the portion responsible for 
responding to softoff in a server scenario (unless logged into a desktop 
environment..).  I'd check for any custom files under /etc/acpi.  I might also:
]# fuser /proc/acpi/event
/proc/acpi/event:     1451
[root@odin firmware]# ps 1451
  PID TTY      STAT   TIME COMMAND
 1451 ?        Ss     0:00 /usr/sbin/acpid

Verify that acpid is the thing paying attention to /proc/acpi/event

-----Original Message-----
From: Christopher J. Walker [mailto:[email protected]] 
Sent: Wednesday, June 24, 2015 10:12 AM
To: [email protected]
Subject: Re: [xcat-user] rpower softoff causing reboot

On 23/06/15 16:51, Ling Gao wrote:
> What hardware is it?
>

IBM idataplex (Model 6391 - dual Xeon(R) CPU E5645 - with two machines in a 2U 
case) running Scientific Linux 6.2 (A RHEL 6.2 clone with security updates).

I think we also had the same issue with a couple of quad socket AMD machines - 
Model 7164 as well.

Chris
>
>
>
> From: "Christopher J. Walker" <[email protected]>
> To: "[email protected]" 
> <[email protected]>
> Date: 06/23/2015 11:46 AM
> Subject: [xcat-user] rpower softoff causing reboot
> ----------------------------------------------------------------------
> --
>
>
>
> On some of our machines,
>
> rpower softoff
>
> causes the machine to reboot, not power down.
>
> Needless to say, this came as something of a surprise to me.
>
> Has anyone any ideas what caused this?
>
> Chris
>
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> network devices and physical & virtual servers, alerts via email & sms 
> for fault. Monitor 25 devices for free with no restriction. Download 
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OpManager is web-based network management software that monitors network 
devices and physical & virtual servers, alerts via email & sms for fault. 
Monitor 25 devices for free with no restriction. Download now 
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------------------------------------------------------------------------------
Monitor 25 network devices or servers for free with OpManager!
OpManager is web-based network management software that monitors 
network devices and physical & virtual servers, alerts via email & sms 
for fault. Monitor 25 devices for free with no restriction. Download now
http://ad.doubleclick.net/ddm/clk/292181274;119417398;o
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