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https://issues.apache.org/jira/browse/KAFKA-14658?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin McCabe updated KAFKA-14658:
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Summary: When listening on fixed ports, defer port opening until we're
ready (was: Do not open broker ports until we are ready to accept traffic)
> When listening on fixed ports, defer port opening until we're ready
> -------------------------------------------------------------------
>
> Key: KAFKA-14658
> URL: https://issues.apache.org/jira/browse/KAFKA-14658
> Project: Kafka
> Issue Type: Bug
> Reporter: Colin McCabe
> Assignee: Colin McCabe
> Priority: Major
>
> We should not open the ports on the broker until we are ready to accept
> traffic. This is a particular concern when in KRaft mode, since in that mode,
> we create the SocketServer object earlier in the startup process than when in
> ZK mode.
> The approach taken in this PR is to defer opening the acceptor port until
> Acceptor.start is called. There is one exception to this rule, however: when
> we are binding to a random port (that is, binding to "port 0"), we open the
> port
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