Resetting consumer group offsets

[kudryk-enverus]

Is it possible to reset a consumer group's offsets using the AdminClient?

I've been trying to experiment to figure if this is possible. I've instantiated an AdminClient and I can successfully retrieve the topics by calling list_topics(), and list my group admin.list_groups(group="mark.test3.all.sa.derive", timeout=30) successfully, but when I try to get the configs for the group:

sa_derive_config = ConfigResource(ResourceType.GROUP, "mark.test3.all.sa.derive") configs = admin.describe_configs(resources=[sa_derive_config]) 

And subsequently invoke result() on the group's future I get the following error:

cimpl.KafkaException: KafkaError{code=INVALID_REQUEST,val=42,str="This most likely occurs because of a request being malformed by the client library or the message was sent to an incompatible broker. See the broker logs for more details."} 

It's unlikely to be an incompatible broker issue, otherwise the first 2 calls would not have succeeded. As far I my understanding of the documentation and looking at the tests that also invoke describe_configs() I'm doing everything correctly.

1. Any thoughts as to why I'm getting this error?
2. And can one using AdminClient actually reset the offsets for a consumer group?

I'm using version 1.9.2 of the library.

When I've looked at the broker logs in AWS Cloudwatch, I see the following error:

org.apache.kafka.common.errors.InvalidRequestException: Unexpected resource type UNKNOWN for resource mark.test3.all.sa.derive 

It would appear whether I pass ResourceType.GROUP or 3 (GROUP) as the first argument to ConfigResource, the broker is receiving UNKNOWN for that group. The group does exist.