diff --git a/readMe.txt b/readMe.txt
index 72c4597..4d8cbdb 100644
--- a/readMe.txt
+++ b/readMe.txt
@@ -9,3 +9,21 @@ clean package -Dmaven.test.skip=true -U
 3.set SPARK_HOME in Configurations
   Edit Configurations --> Application(HttpService) --> Configurations --> Environment Variable
 
+4. yarn log aggregation
+  Edit yarn-site.xml, add the following content
+     <property>
+      <name>yarn.log-aggregation-enable</name>
+      <value>true</value>
+     </property>
+
+     <property>
+      <name>yarn.nodemanager.log-aggregation.debug-enabled</name>
+      <value>true</value>
+     </property>
+
+     <property>
+      <name>yarn.nodemanager.log-aggregation.roll-monitoring-interval-seconds</name>
+      <value>3600</value>
+     </property>
+
+