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https://issues.apache.org/jira/browse/KAFKA-15817?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stanislav Kozlovski resolved KAFKA-15817.
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Resolution: Fixed
Resolving since this was merged. good job!
> Avoid reconnecting to the same IP address if multiple addresses are available
> -----------------------------------------------------------------------------
>
> Key: KAFKA-15817
> URL: https://issues.apache.org/jira/browse/KAFKA-15817
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 3.3.2, 3.4.1, 3.6.0, 3.5.1
> Reporter: Bob Barrett
> Assignee: Bob Barrett
> Priority: Major
> Fix For: 3.7.0
>
>
> In https://issues.apache.org/jira/browse/KAFKA-12193, we changed the DNS
> resolution behavior for clients to re-resolve DNS after disconnecting from a
> broker, rather than wait until we iterated over all addresses from a given
> resolution. This is useful when the IP addresses have changed between the
> connection and disconnection.
> However, with the behavior change, this does mean that clients could
> potentially reconnect immediately to the same IP they just disconnected from,
> if the IPs have not changed. In cases where the disconnection happened
> because that IP was unhealthy (such as a case where a load balancer has
> instances in multiple availability zones and one zone is unhealthy, or a case
> where an intermediate component in the network path is going through a
> rolling restart), this will delay the client successfully reconnecting. To
> address this, clients should remember the IP they just disconnected from and
> skip that IP when reconnecting, as long as the address resolved to multiple
> addresses.
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