I once saw a postmortem where a server process mysteriously tried to delete whole data (fortunately no actual data was lost). After much confusion, the conclus

I once saw a postmortem where a server process mysteriously tried to delete whole data (fortunately no actual data was lost). After much confusion, the conclusion was that a cosmic ray flipped a single bit in a register, making it point to 8 bytes past the correct address in C++ virtual function table. As a result, instead of calling UpdateRow(), the process executed DeleteTable(). Of course cosmic rays don't exactly leave a trace, so we will never know.