Hello,
I know I am replying to this post very late, these messages indicate an issue with hardware, it would be great that in future to run an intensive memory test over a min 24hr, most server manufacturers have a boot CD for that, or use Memtest86+
Please contact Server hardware vendor to further analyze this information and you can forward Server logs so they have where to start looking.
I hope this helps.
Regards
Vishwajit