[Solved] You wrote a Kafka consumer but it never receives any events. Which is the most likely mistake? — Ans: The consumer is subscribed to the wrong topic | Kafka

Kafka - Basics and Event Streaming

You wrote a Kafka consumer but it never receives any events. Which is the most likely mistake?

AThe consumer is subscribed to the wrong topic

BThe producer is sending events correctly

CThe topic has too many partitions

DThe consumer is reading from the correct topic

Step-by-Step Solution

Solution:

Step 1: Identify why consumer gets no events
If a consumer never receives events, a common cause is subscribing to the wrong topic.
Step 2: Evaluate options
The consumer is subscribed to the wrong topic points to wrong topic subscription, which explains no events. Other options do not explain lack of events.
Final Answer:
The consumer is subscribed to the wrong topic -> Option A
Quick Check:
No events = wrong topic subscription [OK]

Quick Trick: Check consumer topic subscription first [OK]

Common Mistakes:

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You wrote a Kafka consumer but it never receives any events. Which is the most likely mistake?