When using the shutdown command with redis-cli the server saves the database and, if successful, silently closes the connection. The redis-cli tool did not correcty handle this EOF case in its readLine loop and was therefore infinitely looping - and eating 100% of the CPU - while waiting for some data which would never come.
Check the 'doc' directory. doc/README.html is a good starting point :)
Description
Languages
C
73.9%
Tcl
24.6%
Python
0.6%
Ruby
0.3%
Makefile
0.3%
Other
0.2%