[Solved] What will happen when the following Python code using confluent-kafka producer is executed?... What will happen when the following Python code using confluent-kafka producer is executed? | Kafka

Kafka - with Java/Python

What will happen when the following Python code using confluent-kafka producer is executed?

from confluent_kafka import Producer

producer = Producer({'bootstrap.servers': 'localhost:9092'})
producer.produce('my_topic', value='hello')
producer.poll(0)
producer.flush()

AThe message is queued but not sent because <code>poll()</code> is called with 0 timeout.

BThe message 'hello' is sent to 'my_topic' and delivery is confirmed before program exits.

CAn error occurs because <code>flush()</code> must be called before <code>produce()</code>.

DThe producer raises an exception due to missing key parameter in <code>produce()</code>.

Step-by-Step Solution

Solution:

Step 1: Create Producer instance
The producer is configured with the Kafka broker address.
Step 2: Produce message
The produce() method queues the message to be sent asynchronously.
Step 3: Call poll(0)
This serves delivery callbacks without blocking; 0 means non-blocking call.
Step 4: Call flush()
This blocks until all messages are delivered or timeout occurs.
Final Answer:
The message 'hello' is sent and delivery is confirmed before exit. -> Option B
Quick Check:
Calling flush() ensures delivery [OK]

Quick Trick: Always call flush() to ensure message delivery [OK]

Common Mistakes:

MISTAKES

Assuming poll(0) sends messages immediately
Not calling flush() before program exit
Expecting produce() to block until delivery

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More Kafka Quizzes

What will happen when the following Python code using confluent-kafka producer is executed?

Step 1: Create Producer instance

Step 2: Produce message

Step 3: Call `poll(0)`

Step 4: Call `flush()`

Final Answer:

Quick Check:

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