[jira] [Created] (KAFKA-10399) Producer and consumer clients could log IP addresses for brokers to ease debugging

["Lucas Bradstreet (Jira)" <ji...@apache.org>]

Lucas Bradstreet created KAFKA-10399:
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             Summary: Producer and consumer clients could log IP addresses for brokers to ease debugging
                 Key: KAFKA-10399
                 URL: https://issues.apache.org/jira/browse/KAFKA-10399
             Project: Kafka
          Issue Type: Improvement
          Components: consumer, producer 
            Reporter: Lucas Bradstreet


Lag in DNS updates and resolution can cause connectivity problems in clients. 
client.dns.lookup = "use_all_dns_ips"
helps reduce the incidence of such issues, however it's still possible for DNS issues to cause real problems with clients.

The ZK client helpfully logs IP addresses with DNS addresses. We could do the same thing in the Kafka clients, e.g.
{noformat}
Group coordinator broker3.my.kafka.cluster.com/52.32.14.201:9092 (id: 3738382 rack: null) is unavailable or invalid{noformat}



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