Minor Description
When a task fails to ping within the hardcoded ping timeout of 5 minutes, TaskHeartbeatHandler logs a message reporting the wrong timeout value. It reports a timeout of mapreduce.task.timeout seconds rather than the 5 minute ping timeout.
This can lead to user confusion if they try increasing mapreduce.task.timeout and see the log message showing the larger value but the task continues to timeout after only 5 minutes.