Application lifecycle in YARN in Hadoop - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start the YARN application by requesting a container from the ResourceManager.

Hadoop

container_request = [1]()

Drag options to blanks, or click blank then click option'

AResourceRequest

BContainerLaunchContext

CApplicationSubmissionContext

DContainerRequest

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing ContainerLaunchContext with ResourceRequest.

Using ApplicationSubmissionContext instead of ResourceRequest.

The ResourceRequest object is used to request containers from the ResourceManager in YARN.

2fill in blank

medium

Complete the code to create the ApplicationSubmissionContext for submitting the application.

Hadoop

app_context = client.[1]()

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AsubmitApplication

BcreateApplication

CgetApplicationReport

DkillApplication

Attempts:

3 left

💡 Hint

Common Mistakes

Using submitApplication() instead of createApplication().

Confusing getApplicationReport() with application creation.

The createApplication() method initializes the ApplicationSubmissionContext needed to submit an application.

3fill in blank

hard

Fix the error in the code to correctly launch the ApplicationMaster container.

Hadoop

am_container = ContainerLaunchContext()
am_container.setCommands([[1]])

Drag options to blanks, or click blank then click option'

A"/bin/bash -c 'start-am.sh'"

B"start-am.sh"

C"/bin/bash start-am.sh"

D"start-am.sh &"

Attempts:

3 left

💡 Hint

Common Mistakes

Not wrapping the command in a shell call.

Adding unnecessary background operator &.

The command must be a shell command string wrapped properly to launch the ApplicationMaster.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps container IDs to their statuses if the status is RUNNING.

Hadoop

running_containers = {container.[1]: container.[2] for container in containers if container.status == 'RUNNING'}

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AgetId

BgetStatus

Cid

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using method calls instead of attributes.

Mixing up keys and values in the dictionary comprehension.

Use the attributes 'id' and 'status' to access container properties in the comprehension.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps application IDs to their final statuses if the status is FINISHED.

Hadoop

finished_apps = {app.[1]: app.[2] for app in apps if app.[3] == 'FINISHED'}

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AapplicationId

BfinalStatus

Cstate

DappId

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect attribute names like 'appId'.

Filtering by 'finalStatus' instead of 'state'.

Use 'applicationId' for the key, 'finalStatus' for the value, and filter by 'state' equal to 'FINISHED'.