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https://issues.apache.org/jira/browse/KAFKA-1553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14069141#comment-14069141
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Jay Kreps commented on KAFKA-1553:
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We have been working on rewriting the clients. We have completed a rewrite of
the producer and are in the middle or redoing the consumer.
https://cwiki.apache.org/confluence/display/KAFKA/Client+Rewrite
These are in a new top-level module clients/. The intention is that eventually
we will deprecate the existing scala clients in favor of these.
> TopicMetadataResponse.brokers not read in scala producer?
> ---------------------------------------------------------
>
> Key: KAFKA-1553
> URL: https://issues.apache.org/jira/browse/KAFKA-1553
> Project: Kafka
> Issue Type: Bug
> Components: producer
> Affects Versions: 0.8.2
> Reporter: Nicolae Marasoiu
> Assignee: Jun Rao
>
> I searched again and I do think that topicMetadataResponse.brokers is not
> read in Scala Producer, or I have not found where it is. (In the java
> producer it does seem used on the other hand).
> The producer seems to only parse its static configuration (properties file on
> key metadata.broker.list on disk stating initial broker list), and cache it
> in BrokerPartitionInfo. It never updates that broker list cache when it
> receives a metadata response!
> It really seems that only that statically configured metadata.broker.list is
> ever queried for metadata, not only initially but at any time e.g. this list
> is never refreshed with the brokers listed in the topic metadata response.
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