Kafka - Monitoring and OperationsWhich Kafka metric is most useful to monitor consumer lag to prevent outages?ABroker CPU usageBUnder-replicated partitions countCConsumer lag in messagesDNumber of topicsCheck Answer
Step-by-Step SolutionSolution:Step 1: Identify key metrics related to consumer healthConsumer lag shows how far behind consumers are from the latest messages.Step 2: Understand why monitoring consumer lag prevents outagesHigh lag means consumers are slow or stuck, risking data loss or delays.Final Answer:Consumer lag in messages -> Option CQuick Check:Consumer lag metric = Prevent consumer outages [OK]Quick Trick: Monitor consumer lag to catch slow consumers early [OK]Common Mistakes:MISTAKESConfusing consumer lag with broker CPU usageMonitoring topic count instead of lagUsing under-replicated partitions metric for consumer lag
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