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https://issues.apache.org/jira/browse/KAFKA-2367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14697567#comment-14697567
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Ismael Juma commented on KAFKA-2367:
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I wasn't aware that it was so difficult to upgrade between Avro versions due to
binary classfile compatibility issues. That is a strong argument for not
depending on it.
> Add Copycat runtime data API
> ----------------------------
>
> Key: KAFKA-2367
> URL: https://issues.apache.org/jira/browse/KAFKA-2367
> Project: Kafka
> Issue Type: Sub-task
> Components: copycat
> Reporter: Ewen Cheslack-Postava
> Assignee: Ewen Cheslack-Postava
> Fix For: 0.8.3
>
>
> Design the API used for runtime data in Copycat. This API is used to
> construct schemas and records that Copycat processes. This needs to be a
> fairly general data model (think Avro, JSON, Protobufs, Thrift) in order to
> support complex, varied data types that may be input from/output to many data
> systems.
> This should issue should also address the serialization interfaces used
> within Copycat, which translate the runtime data into serialized byte[] form.
> It is important that these be considered together because the data format can
> be used in multiple ways (records, partition IDs, partition offsets), so it
> and the corresponding serializers must be sufficient for all these use cases.
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