Kafka - Monitoring and Operations
If a consumer group's lag suddenly increases to a very high number, what is the most likely cause?
If a consumer group's lag suddenly increases to a very high number, what is the most likely cause?
medium📝 Command Output Q5 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand what causes lag increase
Lag grows when consumers cannot keep up with incoming messages, often due to slow processing or errors.Step 2: Eliminate other options
Broker crash or partition decrease would cause other errors; producer stopping would reduce lag, not increase it.Final Answer:
Consumer is slower or stuck processing messages -> Option DQuick Check:
High lag = slow consumer processing [OK]
Quick Trick: High lag means consumer can't keep up [OK]
Common Mistakes:
MISTAKES- Assuming producer stopped causes high lag
- Thinking broker crash directly causes lag
- Confusing partition count with lag
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