Jason Gustafson reopened KAFKA-4221:

> KafkaConsumer Fetcher can send ListOffsets requests in parallel when 
> initializing position
> ------------------------------------------------------------------------------------------
>                 Key: KAFKA-4221
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4221
>             Project: Kafka
>          Issue Type: Improvement
>          Components: consumer
>            Reporter: Jason Gustafson
>            Priority: Major
> With the changes in KIP-79, we've added basic support for sending ListOffsets 
> requests in parallel, however we do not yet utilize this capability when 
> resetting offsets internally. Instead we send a separate ListOffsets request 
> for each partition separately. Should be straightforward to refactor Fetcher 
> to make use of parallel requests.

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