[Solved] What is wrong with this Kafka producer code snippet?ProducerRecord record = new ProducerRecord(null, "key1", "value1"); producer.send(record); | Kafka

Kafka - Producers

What is wrong with this Kafka producer code snippet?

ProducerRecord record = new ProducerRecord<>(null, "key1", "value1");
producer.send(record);

AValue cannot be null

BKey cannot be null

CTopic name cannot be null

DNo error, code is valid

Step-by-Step Solution

Solution:

Step 1: Check parameters passed to ProducerRecord
The topic name is null, which is invalid because Kafka requires a valid topic string.
Step 2: Validate key and value
Key and value can be null, but topic cannot.
Final Answer:
Topic name cannot be null -> Option C
Quick Check:
Topic must be non-null string [OK]

Quick Trick: Topic name must never be null [OK]

Common Mistakes:

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What is wrong with this Kafka producer code snippet?