Change default value of mapreduce.jobtracker.staging.root.dir to /user?

[ghost]

The Hadoop official document recommends to set mapreduce.jobtracker.staging.root.dir to /user.
"The root of the staging area for users' job files. In practice, this should be the directory where users' home directories are located (usually /user)"

I wonder if the default need to be changed. Thanks.