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https://issues.apache.org/jira/browse/KAFKA-1426?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13984463#comment-13984463
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Jeremy A Laycock commented on KAFKA-1426:
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Ahh think I have the reason - it's the inter-play between specifying a groupId
and --from-beginning option on the console consumer. Setting that option
clears the /consumers zk directory. In turn that then affects re-balance and
all other connected consumers.
> Rebalance issue on 0.8.1
> ------------------------
>
> Key: KAFKA-1426
> URL: https://issues.apache.org/jira/browse/KAFKA-1426
> Project: Kafka
> Issue Type: Bug
> Components: consumer
> Affects Versions: 0.8.1
> Reporter: Jeremy A Laycock
> Assignee: Neha Narkhede
> Priority: Minor
>
> When running up 2 console consumers reading from the same group the zookeeper
> path /consumers/<my_group>/ids only contains the latest consumer id - then
> re-balance fails.
> Looking at the rebalance code the only deletion is the
> /consumers/<my_group>/owners/<topic>/<partitions> for each partition a
> consumer "owns"
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