Metrics are not flowing continously for consumer group lag.

[Guruhbk]

I'm trying this kafka exporter for our kafka broker. We have 3 brokers, 3k topics, 12k partitions and 2k consumergroups. I mainly need to exporter for consumer group lag. However, When I tried this, I'm seeing there are some gaps in the metrics. The chart is not complete. For example, metrics comes for 2 mins. Then for the next 5 mins or sometimes 60mins, there won't be any data even for active consumer group. Hence my alerts are failing. Is there any configuration changes I need to do?

Metric name : kafka_consumergroup_lag.

Args
- --kafka.server=kafka-1.kafka:9094
- --kafka.server=kafka-2.kafka:9094
- --kafka.server=kafka-3.kafka:9094
- --sasl.enabled
- --sasl.mechanism=PLAIN
- --sasl.username=
- --sasl.password=

These are the args I'm passing.