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https://issues.apache.org/jira/browse/KAFKA-496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13537231#comment-13537231
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Jay Kreps commented on KAFKA-496:
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I found this helpful in thinking about futures:
http://docs.scala-lang.org/overviews/core/futures.html
> high level producer send should return a response
> -------------------------------------------------
>
> Key: KAFKA-496
> URL: https://issues.apache.org/jira/browse/KAFKA-496
> Project: Kafka
> Issue Type: Bug
> Components: core
> Reporter: Jun Rao
> Assignee: Jay Kreps
> Priority: Blocker
> Labels: features
> Fix For: 0.8.1
>
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> Currently, Producer.send() doesn't return any value. In 0.8, since each
> produce request will be acked, we should pass the response back. What we can
> do is that if the producer is in sync mode, we can return a map of
> (topic,partitionId) -> (errorcode, offset). If the producer is in async mode,
> we can just return a null.
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