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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:
----------------------------
Description:
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 per
broker. 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
}
was:
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
}
> 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 per
> broker. 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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