YARN Log Aggregation
The YARN Log Aggregation option aggregates and moves log files for completed applications
from the local file system to the MapR Data Platform
MapR File System. This allows users to view the
entire set of logs for a particular application using the HistoryServer UI or by running
the yarn logs
command.
By default, YARN container logs are not aggregated on the MapR Data Platform
MapR File System. Instead, the logs are retained for
3 hours on the local file system before they are deleted. To enable YARN log aggregation or
to edit the configuration of YARN log aggregation, you must edit the
yarn-site.xml
file in the following directory:
/opt/mapr/hadoop/hadoop-2.x.x/etc/hadoop/