How to upgrade Spark from 2.3.2 to Spark 2.4.6 (or later)

[#1]

Current Ambari Version: 2.7.3.0

Current HDP Version: 3.1.0.0-78

Is there any official guide for upgrade spark2 in HDP 3.1.0.0?

[#2]

@fengsh This might help you: https://docs.cloudera.com/HDPDocuments/Ambari-2.1.2.1/bk_upgrading_Ambari/content/_Upgrade_Spark_mam...