Enabling MapReduce to write to timeline service v.2

To write MapReduce framework data to timeline service v.2, enable the following configuration in mapred-site.xml:

<property>
  <name>mapreduce.job.emit-timeline-data</name>
  <value>true</value>
</property>

The timeline service is still evolving so you should try it out only to test out the features and not in production, and wait for the more widely adopted version, which should be available sometime soon.