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https://issues.apache.org/jira/browse/KAFKA-495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13448869#comment-13448869
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Jay Kreps commented on KAFKA-495:
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I don't think it does. It is like a filesystem--we should be able to document
what works and what doesn't. I don't see a lot of value to users to making it
configurable, and even if you try to configure '/' to work it won't. I think it
would be better to say in our documentation "the following unicode characters
are valid in a topic name" and just have that be definitive...
> Handle topic names with "/" on Kafka server
> -------------------------------------------
>
> Key: KAFKA-495
> URL: https://issues.apache.org/jira/browse/KAFKA-495
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 0.7, 0.8
> Reporter: Neha Narkhede
> Assignee: Swapnil Ghike
> Labels: bugs
> Fix For: 0.8, 0.7.1
>
> Attachments: kafka-495-v1.patch
>
>
> If a producer publishes data to topic "foo/foo", the Kafka server ends up
> creating an invalid directory structure on the server. This corrupts the
> zookeeper data structure for the topic - /brokers/topics/foo/foo. This leads
> to rebalancing failures on the consumer as well as errors on the zookeeper
> based producer.
> We need to harden the invalid topic handling on the Kafka server side to
> avoid this.
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