Different locations of map reduce logs

HDP:

sudo -u hdfs hadoop fs -ls /app-logs/hdfs/logs

(7 days)

CDH5:

sudo -u hdfs hadoop fs -ls /tmp/logs/hdfs/logs/

(7 days)

EMR (AWS):

sudo -u hdfs hadoop fs -ls /var/logs/hdfs/logs/

(? days)

Default value for "yarn.log-aggregation.retain-seconds" is 7 days. 

If log aggregation is not enabled, the logs are in local file system.  For example, MapR put logs into following places:

/opt/mapr/hadoop/hadoop-2.7.0/logs/userlogs/