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https://issues.apache.org/jira/browse/KAFKA-49?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13156494#comment-13156494
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Prashanth Menon commented on KAFKA-49:
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Agreed, we need to change the wire protocol to include protocol version, it'll
save future effort and solve backwards/forward compatibility issues. Though I
really like Taylor's idea of reusing the first byte of the requestId for
version, it does limit us to 256 versions and 256 possible request types; not a
drastic limitation, but still. Add on to the fact that we're changing
requestId's by collapsing the multi-fetch to just fetch and multi-produce to
just produce and the other large changes happening with replication,
maintaining backwards compatibility with < 0.7 seems like an unnecessarily
significant effort. My two cents is just to introduce a new format going
forward, and leave room for enhancements.
Did a quick look through the wiki, looks good at a glance. I wasn't aware of
all the other protocol changes!
> Add acknowledgement to the produce request.
> -------------------------------------------
>
> Key: KAFKA-49
> URL: https://issues.apache.org/jira/browse/KAFKA-49
> Project: Kafka
> Issue Type: Bug
> Reporter: Jun Rao
>
> Currently, the produce request doesn't get acknowledged. We need to have a
> broker send a response to the producer and have the producer wait for the
> response before sending the next request.
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