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https://issues.apache.org/jira/browse/KAFKA-3068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15113009#comment-15113009
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ASF GitHub Bot commented on KAFKA-3068:
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GitHub user enothereska opened a pull request:
https://github.com/apache/kafka/pull/804
KAFKA-3068: Keep track of bootstrap nodes instead of all nodes ever seen
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/enothereska/kafka kafka-3068
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/804.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #804
----
commit 32f3bffb2281a03fa6449627c144478a0ce666ad
Author: Eno Thereska <eno.there...@gmail.com>
Date: 2016-01-22T20:36:27Z
Keep track of bootstrap nodes instead of all nodes ever seen
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> NetworkClient may connect to a different Kafka cluster than originally
> configured
> ---------------------------------------------------------------------------------
>
> Key: KAFKA-3068
> URL: https://issues.apache.org/jira/browse/KAFKA-3068
> Project: Kafka
> Issue Type: Bug
> Components: clients
> Affects Versions: 0.9.0.0
> Reporter: Jun Rao
> Assignee: Eno Thereska
>
> In https://github.com/apache/kafka/pull/290, we added the logic to cache all
> brokers (id and ip) that the client has ever seen. If we can't find an
> available broker from the current Metadata, we will pick a broker that we
> have ever seen (in NetworkClient.leastLoadedNode()).
> One potential problem this logic can introduce is the following. Suppose that
> we have a broker with id 1 in a Kafka cluster. A producer client remembers
> this broker in nodesEverSeen. At some point, we bring down this broker and
> use the host in a different Kafka cluster. Then, the producer client uses
> this broker from nodesEverSeen to refresh metadata. It will find the metadata
> in a different Kafka cluster and start producing data there.
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