Study Confluent CCDAK Consumer Groups: key concepts, common traps, and exam decision cues.
This chapter covers the part of CCDAK where many candidate mistakes become application bugs in real life. The exam is testing whether you understand what gets read, when progress is recorded, and how a group stays alive while doing actual work.
Commit: The act of recording consumer progress for a partition.
Rebalance: Redistribution of partition assignments across consumer-group members.
| Lesson | Focus |
|---|---|
| 3.1 Poll, Commits & Offset Reset | Understand consumer processing flow, commit timing, and where new groups start reading. |
| 3.2 Rebalances, Lag & Failures | Learn how rebalances happen, how lag develops, and how slow processing changes consumer behavior. |
| If the question is really about… | Go first to… |
|---|---|
| when to commit and what offset reset means | 3.1 Poll, Commits & Offset Reset |
| rebalances, group instability, or lag growth | 3.2 Rebalances, Lag & Failures |