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https://issues.apache.org/jira/browse/KAFKA-3745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15812244#comment-15812244
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Matthias J. Sax edited comment on KAFKA-3745 at 1/13/17 6:06 PM:
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[~sree2k] thanks for picking this up. Just wanted to point out, as this JIRA
contains a public API change, you will need to write a KIP:
https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals
It should not be a big deal to write the KIP -- if you need any help, just let
me know (matth...@confluent.io) and I can guide you through the process.
was (Author: mjsax):
[~sree2k] thanks for picking this up. Just wanted to point out, as this JIRA
contains a public API change, you will need to write a KIP:
https://cwiki.apache.org/confluence/display/KAFKA/Kafka+Improvement+Proposals
It should not be a big dead to write the KIP -- if you need any help, just let
me know (matth...@confluent.io) and I can guide you through the process.
> Consider adding join key to ValueJoiner interface
> -------------------------------------------------
>
> Key: KAFKA-3745
> URL: https://issues.apache.org/jira/browse/KAFKA-3745
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Affects Versions: 0.10.0.0
> Reporter: Greg Fodor
> Assignee: Sreepathi Prasanna
> Priority: Minor
> Labels: api, needs-kip, newbie
>
> In working with Kafka Stream joining, it's sometimes the case that a join key
> is not actually present in the values of the joins themselves (if, for
> example, a previous transform generated an ephemeral join key.) In such
> cases, the actual key of the join is not available in the ValueJoiner
> implementation to be used to construct the final joined value. This can be
> worked around by explicitly threading the join key into the value if needed,
> but it seems like extending the interface to pass the join key along as well
> would be helpful.
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