[Solved] Find the bug in this Kafka controller election monitoring ... Find the bug in this Kafka controller election monitoring code snippet:var controllerFuture = adminClient.describeCluster().controller(); | Kafka

Kafka - Cluster Architecture

Find the bug in this Kafka controller election monitoring code snippet:

var controllerFuture = adminClient.describeCluster().controller();
var controllerId = controllerFuture.id().get();
System.out.println("Controller ID: " + controllerId);

AcontrollerFuture is a KafkaFuture<Node>, id() must be called after get()

Bid() returns a Future, so get() is called twice incorrectly

CMissing call to get() on controllerFuture before id()

DNo bug; code works as expected

Step-by-Step Solution

Solution:

Step 1: Understand KafkaFuture chaining
describeCluster().controller() returns KafkaFuture<Node> which must be resolved first.
Step 2: Identify correct method call order
Must call get() on controllerFuture to get Node, then call id() on Node.
Final Answer:
Missing call to get() on controllerFuture before id() -> Option C
Quick Check:
Call get() on future before accessing id() [OK]

Quick Trick: Call get() on KafkaFuture before accessing Node methods [OK]

Common Mistakes:

Calling id() before get() on KafkaFuture
Assuming id() returns a Future
Not resolving futures properly

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More Kafka Quizzes

Find the bug in this Kafka controller election monitoring code snippet:

Step 1: Understand KafkaFuture chaining

Step 2: Identify correct method call order

Final Answer:

Quick Check:

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