Application lifecycle in YARN in Hadoop - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the first step in the Application lifecycle in YARN?

The first step is Application Submission, where the client submits the application to the ResourceManager.

beginner

What role does the ResourceManager play in YARN's Application lifecycle?

The ResourceManager manages resources and allocates containers to applications based on their needs.

beginner

What is the purpose of the ApplicationMaster in YARN?

The ApplicationMaster coordinates the execution of the application, requesting resources and monitoring progress.

intermediate

What happens during the Container Allocation phase in YARN?

The ResourceManager allocates containers on NodeManagers where the application tasks will run.

beginner

How does YARN handle application completion?

Once the application finishes, the ApplicationMaster notifies the ResourceManager, which then releases resources and cleans up.

What component in YARN is responsible for managing cluster resources?

A ResourceManager

B NodeManager

C ApplicationMaster

D Client

The ResourceManager manages cluster resources and allocates them to applications.

Who submits the application to YARN?

A ResourceManager

B NodeManager

C Client

D ApplicationMaster

The client submits the application to the ResourceManager to start the lifecycle.

What does the ApplicationMaster do?

A Coordinates application execution and resource requests

B Runs the entire cluster

C Allocates containers to other applications

D Submits applications

The ApplicationMaster coordinates the execution of its application and requests resources.

Where do application tasks actually run in YARN?

A ResourceManager

B NodeManager containers

C Client machine

D ApplicationMaster

Application tasks run inside containers managed by NodeManagers.

What happens after an application finishes in YARN?

A Resources are held for reuse

B Client restarts the application automatically

C NodeManager deletes the application

D ApplicationMaster notifies ResourceManager to release resources

The ApplicationMaster informs the ResourceManager to release resources and clean up.

Describe the main steps in the Application lifecycle in YARN from submission to completion.

Think about who does what and when during the lifecycle.

Explain the roles of ResourceManager, ApplicationMaster, and NodeManager in YARN's Application lifecycle.

Focus on each component's responsibility.