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1. sasl.mechanism (String) SASL mechanism used for client connections. This may be any mechanism for which a security provider is available in the JVM. Default value is GSSAPI.
2. sasl.enabled.mechanisms (List<String>) The list of SASL mechanisms enabled in the Kafka server. This may include any mechanism for which a security provider is available in the JVM. Default value is GSSAPI.
3. sasl.mechanism.inter.broker.protocol (String) SASL mechanism used for inter-broker connections. Default value is GSSAPI.

Protocol changes

A new Kafka SaslHandshakeRequest and response type will be defined to add a handshake request flow to enable clients to communicate their chosen SASL mechanism to the broker. The formats of the request and response are shown below:

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Client flow:

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Server flow:

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