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https://issues.apache.org/jira/browse/KAFKA-2149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14511790#comment-14511790
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Gwen Shapira commented on KAFKA-2149:
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Actually the decision to default to latest version for inter-broker protocol
was a design decision, not a bug.
The idea is that if the default is 0.8.2, we have the following problems:
1. New installations will not have new features out-of-the-box, they'll need to
change configuration. Making life easier for experienced admins upgrading vs
new users installing doesn't sound right.
2. We'll need to keep track of the default with every release
We do have the upgrade process in the docs:
https://kafka.apache.org/083/documentation.html#upgrade
> fix default InterBrokerProtocolVersion
> --------------------------------------
>
> Key: KAFKA-2149
> URL: https://issues.apache.org/jira/browse/KAFKA-2149
> Project: Kafka
> Issue Type: Bug
> Reporter: Onur Karaman
> Assignee: Onur Karaman
> Attachments: KAFKA-2149.patch
>
>
> Fix the default InterBrokerProtocolVersion to be KAFKA_082 as specified in
> KIP-2.
> We hit wire-protocol problems (BufferUnderflowException) with upgrading
> brokers to include KAFKA-1809. This specifically happened when an older
> broker receives a UpdateMetadataRequest from a controller with the patch and
> the controller didn't explicitly set their inter.broker.protocol.version to
> 0.8.2
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