Monday, April 21, 2008

Night of the Living ROOT

This is the awesome error ROOT gave me today:

Error in : Cannot open file: recHits/hRHSumQ22_Summary, TGraph is Zombie

Appearently the "child" and "parent" processes lost connection, and the child is left running when the parent leaves. There is no one to clean up after the child. I thought this should probably be called an "Orphan process" instead of a "Zombie process" but an Orphan is a process that is adopted by another process and cleans up after it, maybe I should call this clean-up process the "Grandparent"?

Sunday, April 13, 2008

Random Segfaults Quake Me

Why do I hate CMSSW today?
I'm on event number 46,616 out of 50,000. This generation and reconstruction code for halo muons has been running for 2 days. And it randomly crashes!
You would think during the first 46,615 events the computer would realize it was accessing bad memory, and seg fault earlier, but NOOOOOOOOO.
Matt and I were talking about this. We tell computers what to do. We know what we want. Why don't computers know what we want?