YARN is used to manage resources and execute different applications over a multi-node cluster. It allows users to submit any type of application to the cluster. It solves scalability and MapReduce framework-related issues by providing a generic implementation of application execution.
This chapter targets the YARN users and developers to develop their understanding of the application execution flow. With the help of flow diagrams and snapshots, it explains how the YARN components communicate with each other during application execution.
In this chapter, we'll cover:
Understanding application execution flow
Submitting a sample MapReduce application
Handling failures in YARN
Exploring container and application logs