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https://issues.apache.org/jira/browse/KAFKA-1072?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jay Kreps resolved KAFKA-1072.
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Resolution: Fixed
I think this is solved with the partition.assignment.strategy option in 0.8.2
> Allow mulitple topics selected with a TopicFilter to be balanced among
> consumers
> --------------------------------------------------------------------------------
>
> Key: KAFKA-1072
> URL: https://issues.apache.org/jira/browse/KAFKA-1072
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.8.0
> Reporter: Jason Rosenberg
> Fix For: 0.9.0
>
>
> Currently, there is no parallelism used when consuming a set of topics
> selected by a white list topic filter, if those topics all have a partition
> count of 1. Currently, all topics that match the filter get assigned to the
> same thread on the same consumer, even though there may be plenty of
> different topics (and therefore many partitions to be consumed from).
> There are often good reasons to use a partition count of only 1 (e.g. to
> preserve message ordering). For arbitrary scalability, over a large number
> of topics, this would be a great benefit to be able to consume topics
> balanced over a set of available consumers.
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