Merge pull request #109846 from dagiro/hadoop2

hadoop2

Author: PRMerger9

articles/hdinsight/hdinsight-hadoop-customize-cluster-bootstrap.md

@@ -1,13 +1,13 @@
 ---
 title: Customize Azure HDInsight cluster configurations using bootstrap
-description: Learn how to customize HDInsight cluster configuration programmatically using .Net, PowerShell, and Resource Manager templates.
+description: Learn how to customize HDInsight cluster configuration programmatically using .NET, PowerShell, and Resource Manager templates.
 author: hrasheed-msft
 ms.author: hrasheed
 ms.reviewer: jasonh
 ms.service: hdinsight
 ms.topic: conceptual
 ms.custom: hdinsightactive
-ms.date: 11/21/2019
+ms.date: 04/01/2020
 ---
 
 # Customize HDInsight clusters using Bootstrap
@@ -121,6 +121,18 @@ You can use bootstrap in Resource Manager template:
 
 ![Hadoop customizes cluster bootstrap Azure Resource Manager template](./media/hdinsight-hadoop-customize-cluster-bootstrap/hdinsight-customize-cluster-bootstrap-arm.png)
 
+Sample Resource Manager template snippet to switch configuration in spark2-defaults to periodically clean up event logs from storage.  
+
+```json
+"configurations": {
+    "spark2-defaults": {
+        "spark.history.fs.cleaner.enabled": "true",
+        "spark.history.fs.cleaner.interval": "7d",
+        "spark.history.fs.cleaner.maxAge": "90d"
+    }
+}
+```
+
 ## See also
 
 * [Create Apache Hadoop clusters in HDInsight](hdinsight-hadoop-provision-linux-clusters.md) provides instructions on how to create an HDInsight cluster by using other custom options.