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Posted to users@kafka.apache.org by Scott Reynolds <sr...@twilio.com> on 2016/09/12 18:35:12 UTC

Struggling to understand Group Coordinator election (0.9)

List,

Documentation about Group Coordinator election seems to reference
zookeeper, but I am unable to find anything in zookeeper. Is it using kafka
to store this information like consumer offsets ?

Can someone explain how Group Coordinator election works ?

We had an incident during a reassignment of partitions. One consumer group,
for ~15 mins, was unable to discover their coordinator and kept retrying
the ConsumerMetadataRequest rpc.

Any pointers to code and accurate documentation would be welcome.

thanks!