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https://issues.apache.org/jira/browse/KAFKA-2008?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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TAO XIAO updated KAFKA-2008:
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Affects Version/s: 0.8.2.0
> Update num.consumer.fetchers description in Kafka documentation
> ---------------------------------------------------------------
>
> Key: KAFKA-2008
> URL: https://issues.apache.org/jira/browse/KAFKA-2008
> Project: Kafka
> Issue Type: Improvement
> Components: website
> Affects Versions: 0.8.2.0
> Reporter: TAO XIAO
>
> The description of num.consumer.fetchers currently shown in consumer config
> section of Kafka document is not accurate.
> num.consumer.fetchers actually controls the max number of fetcher threads
> that can be created in consumer. The actual number of fetcher threads is
> controlled by the combination of topic, partition and num.consumer.fetchers
> Reference source code in AbstractFetcherManager
> private def getFetcherId(topic: String, partitionId: Int) : Int = {
> Utils.abs(31 * topic.hashCode() + partitionId) % numFetchers
> }
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