[KAFKA-9257] Allow listeners to bind on same port but different interfaces

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.3.1
• Component/s: network
• Assignee: Unassigned
• Reporter: Gérald Quintana
• Created: 02/Dec/19 12:13
• Updated: 02/Dec/19 12:13

Description

It's not possible to bind two listeners to two distinct network interfaces using the same port

listeners=ONE://<ip1>:9092,TWO://<ip2>:9092
advertised.listeners=ONE://<hostname1>:9092,TWO://<hostname2>:9092
listener.security.protocol.map=ONE:PLAINTEXT,TWO:PLAINTEXT

Kafka server returns an error:

[2019-12-02 13:07:18,256] ERROR Exiting Kafka due to fatal exception (kafka.Kafka$)
 java.lang.IllegalArgumentException: requirement failed: Each listener must have a different port, listeners: ONE://<ip1>:9092,TWO://<ip2>:9092
 at scala.Predef$.require(Predef.scala:281)
 at kafka.utils.CoreUtils$.validate$1(CoreUtils.scala:305)
 at kafka.utils.CoreUtils$.listenerListToEndPoints(CoreUtils.scala:316)
 at kafka.server.KafkaConfig.advertisedListeners(KafkaConfig.scala:1407)
 at kafka.server.KafkaConfig.validateValues(KafkaConfig.scala:1482)
 at kafka.server.KafkaConfig.<init>(KafkaConfig.scala:1460)
 at kafka.server.KafkaConfig.<init>(KafkaConfig.scala:1114)
 at kafka.server.KafkaConfig$.fromProps(KafkaConfig.scala:1094)
 at kafka.server.KafkaServerStartable$.fromProps(KafkaServerStartable.scala:28)
 at kafka.Kafka$.main(Kafka.scala:68)
 at kafka.Kafka.main(Kafka.scala)