EMR Console Access to Persistent YARN Timeline Server and Tez UI
Amazon EMR now persists the YARN timeline server and Tez user interface (UI) along with the event and container logs outside the cluster. You can now debug and monitor your YARN applications independent of the cluster’s life cycle by logging directly into the web interfaces using the EMR console. The YARN timeline server and Tez UI are open-source applications that provide metrics and visual tools for active and terminated clusters.
Source:: Amazon AWS