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From "Vahid S Hashemian" <vahidhashem...@us.ibm.com>
Subject ConsumerGroupCommand tool improvement?
Date Thu, 02 Aug 2018 21:23:54 GMT
Hi all,

A requirement has been raised by a colleague and I wanted to see if there 
is any interest in the community in adding the functionality to Apache 
Kafka.

ConsumerGroupCommand tool in describe ('--describe' or '--describe 
--offsets') mode currently lists all topics the group has consumed from 
and all consumers with assigned partitions for a single group.
The idea is to allow filtering of topics, consumers (client ids), and even 
groups using regular expressions. This will allow the tool to handle use 
cases such as
What's the status of a particular consumer (or consumers) in all the 
groups they are consuming from? (for example to check if they are lagging 
behind in all groups)
What consumer groups are consuming from a topic (or topics) and what's the 
lag for each group?
Limit the existing result to the topics/consumers of interest (for groups 
with several topics/consumers)
...

This would potentially lead to enhancing the AdminClient API as well.

If the community also sees a value in this, I could start drafting a KIP.

Thanks for your feedback.
--Vahid


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