It's HP iLo related, programs are allowed to open a channel to query the iLo management processor, that error message shows that ilo is having 'issues' handling the request. What that may be, I've no idea. Why it's showing up in your /messages, I've no idea. Are you using the HP embedded flavour of ESXi? Maybe it's related to their SIM agents they embed in the rom.
If I was looking to troubleshoot this, the first thing I'd do is look at iLo, check your firmware is upto date.
http://www.hp.com/support/ilo2
Can you iLo into the server? Has it even been set up? If you're not using iLo then I wouldn't sweat too much.