This looks like a memory error of some kind. Do you have physical access to the server? If so you can try removing memory sticks to find the culprit. Can you provide some more info?
Is this a new error on a server that has been running for a while?
Is the system able to boot?
Check out this tool for debugging memory:
Memtest86+ - Advanced Memory Diagnostic Tool
If you can describe the actions that led to this, it would be helpful in diagnosing.