Conquer Apache Kafka 2026 – Dive into Data Streaming Dominance!

Setting acks = 0 in Kafka indicates that the producer will not wait for any acknowledgment from the broker after sending a message. This means the producer sends messages without confirming whether they have been successfully received by the broker. As a result, while this setting allows for lower latency and higher throughput since the producer doesn’t wait for any feedback, it also introduces significant risk.

Since the producer does not receive any acknowledgment, there is a possibility of message loss, and those messages may not be stored in Kafka at all. This lack of acknowledgment signifies that messages can indeed be lost, making this mode of operation less safe for crucial data.

Thus, both the conditions that the message is sent without waiting for acknowledgment and that it is considered unsafe and can be lost are accurately represented by the choice. This highlights the trade-off between speed and reliability when configuring Kafka producer settings.