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Current state: Under Discussion

Discussion thread: here [Change the link from the KIP proposal email archive to your own email thread]

JIRA: here

Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).

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The existing configuration "num.network.threads" will be updated to also support being set on specific listener via the "listener.name.<NAME>" notation. Like this other per-listener configuration, the listener name must be provided in lower case.

For example, a valid configuration could be:

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./bin/kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers --entity-default --alter --add-config listener.name.internal.num.network.threads=3

The documentation will be adjusted to mention it can optionally be configured on a specific listener:
Listener-level limits may also be configured by prefixing the config name with the listener prefix, for example, listener.name.internal.num.network.threads

Proposed Changes

Most of the changes are in SocketServer where the logic creating Acceptors and Processors lives. To make this reconfigurable, the data plane acceptor will have to implement ListenerReconfigurable. Also the logic to create Processors will be moved directly inside Acceptor instead of being driven by SocketServer.

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