This topic describes the release notes of E-MapReduce (EMR) V4.4.1, including the release date and updates.

Release date

September 15, 2020 for EMR V4.4.1

Updates

Service Description
YARN
  • The hadoop/tools/lib directory is deleted from the value of the yarn.application.classpath parameter.
  • Default parameter settings for MapReduce jobs are optimized.
Hive Default parameter settings are optimized.
Tez
Ranger
  • Impala-based access control is supported.
  • The jackson-databind version is updated.
Impala
  • Integration with Ranger is supported.
  • Shiro is updated to 1.6.0.
SmartData SmartData is updated to 2.7.301.
Bigboot
Knox
  • The web UI of Tez can be independently viewed. Knox is compatible with Tez on the web UI of YARN.
  • Shiro is updated to 1.6.0.
EMRDOCTOR The following issue is fixed: Job information is not collected if a time-based configuration file is empty.
Ganglia The detection feature of the service RPC port for Hadoop Distributed File System (HDFS) is enabled.
Oozie
  • The issue that the web UI cannot be accessed is fixed.
  • The jackson-databind version is updated.
Zookeeper Internal IP addresses can be bound to Elastic Compute Service (ECS) instances to start service ports.
Superset The startup script is repaired.
Livy The versions of jackson-databind and Fastjson are updated.
Zepplin The versions of jackson-databind and Shiro are updated.
HAS The versions of jackson-databind and Fastjson are updated.
Flume The Fastjson version is updated.