在yarn-site.xml配置文件中添加如下内容：

##开启日志聚集功能

        <property>

                <name>yarn.log-aggregation-enable</name>

                <value>true</value>

        </property>

##日志保存7天（单位秒）

        <property>

                <name>yarn.log-aggregation.retain-seconds</name>

                <value>600000</value>

        </property>

重启resourcemanager、nodemanager和historyserver守护进程：

            sbin/yarn-daemon.sh start|stop resourcemanager

            sbin/yarn-daemon.sh start|stop nodemanager

            或者

            sbin/start-yarn.sh

            sbin/stop-yarn.sh

           

            sbin/mr-jobhistory-daemon.sh start|stop historyserver