commit d72894e09d7e58bc2cd3766c500a66e7aa0c3d0f Author: Arun C Murthy <acmurthy@apache.org> Date: Tue Mar 1 16:36:55 2011 -0800 Tuning out-of-band heartbeats, introduced a new config: mapreduce.tasktracker.outofband.heartbeat.damper.