Given this Java Kafka producer configuration connecting to Amazon MSK: Properties props = new Properties(); props.put("bootstrap.servers", "b-1.mskcluster:9092,b-2.mskcluster:9092"); props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer"); props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer"); What will happen if the bootstrap servers are unreachable?

medium📝 Predict Output Q4 of 15

Kafka - Kubernetes and Cloud Deployment

AProducer throws an exception immediately on creation

BProducer creation succeeds, but sending messages blocks or fails

CProducer silently drops messages without error

DProducer connects to a default local Kafka broker

Step-by-Step Solution

Solution:

Step 1: Understand Kafka producer bootstrap behavior
The producer tries to connect to bootstrap servers on sending messages, not on creation.
Step 2: Analyze unreachable bootstrap servers effect
Producer creation succeeds, but sending messages will block or fail due to no connection.
Final Answer:
Producer creation succeeds, but sending messages blocks or fails -> Option B
Quick Check:
Bootstrap unreachable = send blocks/fails [OK]

Quick Trick: Producer connects on send, not on creation [OK]

Common Mistakes:

Expecting exception on producer creation
Assuming silent message drops
Thinking it connects to local broker automatically

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Step 1: Understand Kafka producer bootstrap behavior

Step 2: Analyze unreachable bootstrap servers effect

Final Answer:

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