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https://issues.apache.org/jira/browse/KAFKA-3352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16549153#comment-16549153
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Marco Brade commented on KAFKA-3352:
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I'm currently facing a super slow Kafka client since I'm using SASL (doesn't
matter if I use SASL_PLAINTEXT or SASL_SSL).
The problem is that again getInetAddress().getHostName() is being executed.
Any plan to fix that again also for the latest Kafka Clients 1.1.x 0.11.x?
> Avoid DNS reverse lookups
> -------------------------
>
> Key: KAFKA-3352
> URL: https://issues.apache.org/jira/browse/KAFKA-3352
> Project: Kafka
> Issue Type: Improvement
> Reporter: Ismael Juma
> Assignee: Ismael Juma
> Priority: Major
> Fix For: 0.10.0.0
>
>
> We use `InetSocketAddress.getHostName` in `Cluster.bootstrap` and
> `SocketServer` This call can cause a reverse DNS look-up if an IP address is
> used in the configuration. `getHostString` avoids the reverse DNS look-up.
> `InetAddress.getHostName` has the same issue and it's used in
> `SaslChannelBuilder`, `SslChannelBuilder` and `ZookeeperConsumerConnector`. I
> am not changing these because the the former two actually require the FQDN
> while the latter is on its way to deprecation.
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