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Posted to dev@kafka.apache.org by "Rajini Sivaram (JIRA)" <ji...@apache.org> on 2018/10/11 17:48:00 UTC

[jira] [Resolved] (KAFKA-6863) Kafka clients should try to use multiple DNS resolved IP addresses if the first one fails

     [ https://issues.apache.org/jira/browse/KAFKA-6863?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rajini Sivaram resolved KAFKA-6863.
-----------------------------------
    Resolution: Fixed
      Reviewer: Rajini Sivaram

> Kafka clients should try to use multiple DNS resolved IP addresses if the first one fails
> -----------------------------------------------------------------------------------------
>
>                 Key: KAFKA-6863
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6863
>             Project: Kafka
>          Issue Type: Improvement
>          Components: clients
>    Affects Versions: 1.0.0, 1.1.0
>            Reporter: Edoardo Comar
>            Assignee: Edoardo Comar
>            Priority: Major
>             Fix For: 2.1.0
>
>
> Currently Kafka clients resolve a symbolic hostname using
>   {{new InetSocketAddress(String hostname, int port)}}
> which only picks one IP address even if the DNS has multiple records for the hostname, as it calls
>  {{InetAddress.getAllByName(host)[0]}}
> For some environments where the hostnames are mapped by the DNS to multiple IPs, e.g. in clouds where the IPs point to the external load balancers, it would be preferable that the client, on failing to connect to one of the IPs, would try the other ones before giving up the connection.
>  
>  



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