Hi, I'm trying to write an external tool to monitor consumer lag on Apache Kafka.
For this purpose, I'm using the kafka-consumer-groups tool to fetch the consumer offsets. When using this tool, partition assignments seem to be unavailable temporarily during the creation of a new topic even if the consumer group has no subscription on this new topic. This seems to match the documentation <https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Client-side+Assignment+Proposal> saying *"Topic metadata changes which have no impact on subscriptions cause resync"*. However, when this occurs I'd expect the state of the consumer to be "PreparingRebalance" or "AwaitingSync" but it is simply "Stable". Is this a bug in the tooling or is there a different way to obtain the correct offsets for a consumer group during a rebalance? I'm using Kafka 10.2.1 but I haven't found any related issues in recent changelogs. Best regards, Wouter
