- Lab
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Libraries: If you want this lab, consider one of these libraries.
- Cloud

Tuning a Kafka Consumer
You can configure your Kafka consumers in a variety of ways in order to customize their behavior. In many production scenarios, ensuring your consumers perform well for your use case is a matter of tweaking consumer configurations. In this lab, we will work with this process hands-on. We will be provided with some consumer code and a list of issues that can be addressed by changing the consumer configuration. We will then need to identify what configuration changes should be made in order to address these issues, and we will need to implement those changes in the consumer.

Lab Info
Table of Contents
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Challenge
Clone the Starter Project from GitHub and Perform a Test Run
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Clone the starter project from GitHub:
cd ~/ git clone https://github.com/linuxacademy/content-ccdak-consumer-tuning-lab.git
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Perform a test run to make sure the code is able to compile:
cd content-ccdak-consumer-tuning-lab ./gradlew run
The code should compile, but the consumer will fail to run.
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Challenge
Implement Configuration Changes to Address the Issues
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Edit the Consumer class:
vi src/main/java/com/linuxacademy/ccdak/consumer/MemberSignupsConsumer.java
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Increase the minimum fetch size by setting
fetch.min.bytes=1024
:props.setProperty("fetch.min.bytes", "1024");
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Send heartbeats more frequently by setting
heartbeat.interval.ms=2000
:props.setProperty("heartbeat.interval.ms", "2000");
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Fix the issue with the offset reset behavior by setting
auto.offset.reset=earliest
:props.setProperty("auto.offset.reset", "earliest");
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Run your code to verify it still works:
./gradlew run
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About the author
Real skill practice before real-world application
Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.
Learn by doing
Engage hands-on with the tools and technologies you’re learning. You pick the skill, we provide the credentials and environment.
Follow your guide
All labs have detailed instructions and objectives, guiding you through the learning process and ensuring you understand every step.
Turn time into mastery
On average, you retain 75% more of your learning if you take time to practice. Hands-on labs set you up for success to make those skills stick.