BackgroundWe have a few consumer that *used* to consume a particular topic. This topic still exist and the consumers still exist, however, these consumer no longer subscribe to the topic. When we check the offset for the Consumer Group, kafka.tools.ConsumerOffsetChecker, ZK believes this tier is falling behind even though it's no longer attempting to consume this topic. Kafka StackKafka 0.8.1 with Zookeeper 3.3.4; Simple Consumer Question We keep track of the lag using the kafka.tools.ConsumerOffsetChecker to ensure we don't have a systematic issue we need to investigate. Is there any way to expire stale, or no longer consumed, topics per consumer group? Casey