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https://issues.apache.org/jira/browse/KAFKA-1535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14065646#comment-14065646
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Jay Kreps commented on KAFKA-1535:
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Our current model of nodes is that they are permanent. That is if there is a
node 1, if it dies, it will come back or be replaced. It need not literally be
the same machine, just that if a node dies you will eventually add a new node
with id 1 which will take over the work 1 used to do.
The metadata response is read by the producer and consumer clients. For example
in the new java code it is in
clients/src/main/java/org/apache/kafka/common/requests/MetadataResponse.java.
> return all live brokers in TopicMetadataResponse
> ------------------------------------------------
>
> Key: KAFKA-1535
> URL: https://issues.apache.org/jira/browse/KAFKA-1535
> Project: Kafka
> Issue Type: Improvement
> Components: core
> Affects Versions: 0.8.2
> Reporter: Jun Rao
> Labels: newbie
> Attachments:
> KAFKA-1535__return_all_live_brokers_in_TopicMetadataResponse_.patch
>
>
> Currently, we only return the brokers that have assigned replicas for a topic
> in TopicMetadataResponse. The new producer will use those brokers for
> refreshing metadata. Now suppose that we stop all those brokers, copy all
> local data to some new hosts and then restart those hosts (with the original
> broker id). There is no way for the new producer to automatically get the
> information about the new brokers since all old brokers are gone.
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