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https://issues.apache.org/jira/browse/KAFKA-724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14311008#comment-14311008
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Jay Kreps commented on KAFKA-724:
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This is fixed on the old scala clients, but not on the new producer and
consumer. It would be good to add the -1 means use OS default setting.
> Allow automatic socket.send.buffer from operating system
> --------------------------------------------------------
>
> Key: KAFKA-724
> URL: https://issues.apache.org/jira/browse/KAFKA-724
> Project: Kafka
> Issue Type: Improvement
> Reporter: Pablo Barrera
> Labels: newbie
>
> To do this, don't call to socket().setXXXXXXXBufferSize. This can be
> controlled by the configuration parameter: if the value socket.send.buffer or
> others are set to -1, don't call to socket().setXXXXXXXBufferSize
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