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From "Vahid S Hashemian" <vahidhashem...@us.ibm.com>
Subject Re: Delete Consumer Group Information
Date Tue, 04 Oct 2016 19:56:31 GMT
Please take a look at this answer to a similar recent question:

The config parameter mentioned in the post for expiration of committed 
offsets is "offsets.retention.minutes". (see also here: 


From:   "Cuneo, Nicholas" <ncuneo@tycoint.com>
To:     "users@kafka.apache.org" <users@kafka.apache.org>
Date:   10/04/2016 12:04 PM
Subject:        Delete Consumer Group Information

We are using Kafka .9 and are playing around with the consumer group 
feature.  We have a lot of junk and stale consumer group information in 
the consumer groups and want to get rid of it.  What’s the best way to do 
Using Kafka Tool, I see that all the consumer groups are stored in ‘Kafka’ 
and not ‘Zookeeper’.  When I go to zookeeper the consumers node is empty.
I tried using the ConsumerGroupCommand to delete it but since zookeeper 
shows no consumers this does nothing.  If the consumer groups show only 
being stored in Kafka, are they considered in memory and completely 
restarting all Kafka nodes remove them?  If so – why aren’t they being 
replicated to zookeeper for persistence?

Nick Cuneo  /  Software Engineer, Cloud  /  Enterprise Software
Tel: +1 949 517 4802  /  Mobile: +1 949 243 4952
3 Ada  /  Irvine, CA 92618  /  USA
ncuneo@tycoint.com  /  www.tyco.com

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