Rajini Sivaram created KAFKA-6546:
-------------------------------------

             Summary: Add ENDPOINT_NOT_FOUND_ON_LEADER error code for missing 
listener
                 Key: KAFKA-6546
                 URL: https://issues.apache.org/jira/browse/KAFKA-6546
             Project: Kafka
          Issue Type: Improvement
          Components: core
            Reporter: Rajini Sivaram
            Assignee: Rajini Sivaram
             Fix For: 1.2.0


In 1,1, if an endpoint is available on the broker processing a metadata 
request, but the corresponding listener is not available on the leader of a 
partition, LEADER_NOT_AVAILABLE is returned (earlier versions returned 
UNKNOWN_SERVER_ERROR). This could indicate broker misconfiguration where some 
brokers are not configured with all listeners or it could indicate a transient 
error when listeners are dynamically added, We want to treat the error as a 
transient error to process dynamic updates, but we should notify clients of the 
actual error. This change should be made when MetadataRequest version is 
updated so that LEADER_NOT_AVAILABLE is returned to older clients.

SeeĀ 
[https://cwiki.apache.org/confluence/display/KAFKA/KIP-226+-+Dynamic+Broker+Configuration]
 andĀ  [https://github.com/apache/kafka/pull/4539] for details.



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