Root region location changed. Sleeping.

[Justin Cohen]

 This morning my development hbase cluster stopped working.  I was 
seeing this in the logs:

http://pastebin.com/b1YT5Rwb
A restart fixed it.  As this is my dev cluster used with minimal load 
the hardware isn't the most ideal, but I haven't had any problems with 
it in the past few months.  I'm running 0.20.5

What should I look for to see what really failed?

Thanks,
-justin