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https://issues.apache.org/jira/browse/KAFKA-3834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16088866#comment-16088866
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Abhishek Agarwal commented on KAFKA-3834:
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[~hachikuji] If the ips are misconfigured or the broker is not available, then
group_coordinator_request will never be sent to that node. Isn't it? Won't the
lookupCoordinator() call itself fail, before the client blocks itself in
awaitMetadataUpdate()
> Consumer should not block in poll on coordinator discovery
> ----------------------------------------------------------
>
> Key: KAFKA-3834
> URL: https://issues.apache.org/jira/browse/KAFKA-3834
> Project: Kafka
> Issue Type: Improvement
> Components: consumer
> Reporter: Jason Gustafson
> Assignee: Jason Gustafson
>
> Currently we block indefinitely in poll() when discovering the coordinator
> for the group. Instead, we can return an empty record set when the passed
> timeout expires. The downside is that it may obscure the underlying problem
> (which is usually misconfiguration), but users typically have to look at the
> logs to figure out the problem anyway.
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