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https://issues.apache.org/jira/browse/KAFKA-48?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13178466#comment-13178466
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Jun Rao commented on KAFKA-48:
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Taylor,
Sorry for the late response. I am not sure that I understand your proposal.
a. Why do we need a local socket? It seems that the same thing can be achieved
by just turning on the write_interesting bit in the socket key corresponding to
a client request.
b. It's not clear to me how you correlate a queued client request with the
corresponding client socket.
> Implement optional "long poll" support in fetch request
> -------------------------------------------------------
>
> Key: KAFKA-48
> URL: https://issues.apache.org/jira/browse/KAFKA-48
> Project: Kafka
> Issue Type: Bug
> Reporter: Alan Cabrera
> Assignee: Jay Kreps
>
> Currently, the fetch request is non-blocking. If there is nothing on the
> broker for the consumer to retrieve, the broker simply returns an empty set
> to the consumer. This can be inefficient, if you want to ensure low-latency
> because you keep polling over and over. We should make a blocking version of
> the fetch request so that the fetch request is not returned until the broker
> has at least one message for the fetcher or some timeout passes.
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