GitHub user hachikuji opened a pull request:
https://github.com/apache/kafka/pull/180
KAFKA-2486; fix performance regression in new consumer
The sleep() in KafkaConsumer's poll blocked any pending IO from being
completed and created a performance bottleneck. It was intended to implement
the fetch backoff behavior, but that was a misunderstanding of the setting
"retry.backoff.ms" which should only affect failed fetches.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/hachikuji/kafka KAFKA-2486
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/180.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #180
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commit 8bec099900fdb511cf9f4b5a31c63d695e6a9c49
Author: Jason Gustafson <ja...@confluent.io>
Date: 2015-08-31T19:23:30Z
KAFKA-2486; fix performance regression in new consumer
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