The Zookeeper optional component is available in 3.0 images. You specify optional components that you want to install when you create a cluster (see Add optional components).
yarn.nodemanager.recovery.enabled and HDFS Audit Logging are enabled by default in 3.0 images.
micromamba is installed as part of the Python installation.
The default resource calculator for YARN has been changed from DefaultResourceCalculator to DominantResourceCalculator, which uses the dominant-resource concept to determine resource allocation, such as Memory and CPU allocation. This change impacts Autoscaler, which scales based on the dominant resource usage of the cluster.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-10-24 UTC."],[],[]]