Container allocation in Hadoop - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to allocate a container in Hadoop YARN.

Hadoop

container = nmClient.allocateContainer([1])

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AnodeManager

Bcontainer

CcontainerRequest

Dresource

Attempts:

3 left

💡 Hint

Common Mistakes

Using the container object instead of the request.

Passing the node manager instead of the request.

The allocateContainer method requires a containerRequest object to specify resource needs.

2fill in blank

medium

Complete the code to specify the memory size for the container request.

Hadoop

resource.setMemory([1])

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Amemory

B1024

CcontainerMemory

D2048

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a variable name instead of a number.

Using too large or too small values without context.

The setMemory method expects an integer value representing memory in MB, such as 1024.

3fill in blank

hard

Fix the error in the code to request a container with the correct resource capability.

Hadoop

containerRequest = new ContainerRequest([1], null, null, 1)

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Amemory

Bcontainer

CnodeManager

Dresource

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the container object instead of resource.

Using node manager or memory variable incorrectly.

The ContainerRequest constructor requires a resource object describing the container's capabilities.

4fill in blank

hard

Fill both blanks to create a resource with 2048 MB memory and 2 virtual cores.

Hadoop

resource = Resource.newInstance([1], [2])

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A2048

B2

C1024

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping memory and cores values.

Using incorrect units for memory.

The newInstance method takes memory in MB and number of virtual CPU cores as arguments.

5fill in blank

hard

Fill all three blanks to create a container request with resource, null nodes, and priority 5.

Hadoop

containerRequest = new ContainerRequest([1], [2], null, [3])

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Aresource

Bnull

C5

Dpriority

Attempts:

3 left

💡 Hint

Common Mistakes

Passing priority as a variable instead of a number.

Using non-null nodes when any node is acceptable.

The ContainerRequest constructor needs resource, nodes (null for any), racks (null), and priority.