YARN Timeline server in Hadoop 3.x

The job history server in MapReduce provides the information about all the current and historical MapReduce. jobs details. The job history server was only able to capture the information about MapReduce jobs and it was not able to capture YARN level events and metrics. As we know, YARN has a capability to run applications other than MapReduce and thus, there was a need to have a YARN-specific application that can capture information about all the applications. The YARN Timeline server is responsible for retrieving current as well as historic information about applications. The metrics and information collected through a YARN Timeline server are generic in nature and hence have a common structure that helps in debugging the logs and capturing other metrics for any specific use. The Timeline server captures two types of information, which...