*mapred.jobtracker.restart.recover *is the old API, while the other one is
for new. It is used to specify whether the job should try to resume at
recovering time and when restarting. If you don't want to use it then the
default value of false is used (specified in the already packaged/bundled
config file in the distribution jars.)
On Mon, Sep 23, 2013 at 10:31 PM, Viswanathan J
> I'm using the version Hadoop 1.2.1 in production hdfs, i can see the the
> following properties with the value in jobtracker job.xml,
> *mapreduce.job.restart.recover - true*
> *mapred.jobtracker.restart.recover - false**
> What is the difference and which property will taken by the jobtracker? Do
> we need really need these properties?
> Also I didn't set the value to those properties in any of the
> configurations(eg., mapred-site.xml).
> Please help on this.