[jira] [Commented] (ZOOKEEPER-4956) Provide a HostProvider that uses DNS SRV record for dynamic server discovery

["Li Wang (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-4956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18022978#comment-18022978 ] 

Li Wang commented on ZOOKEEPER-4956:
------------------------------------

Implementation Details:

* DnsSrvHostProvider: New HostProvider implementation that performs DNS SRV lookups to discover ZooKeeper servers
* HostConnectionManager: Extracted connection management and reconfiguration logic from StaticHostProvider into a reusable component
* StaticHostProvider Refactoring: Modified to use HostConnectionManager for consistent connection management and reconfiguration handling across different providers
* Configuration: Added zookeeper.hostProvider.dnsSrvRefreshIntervalMs client property for DNS refresh intervals


> Provide a HostProvider that uses DNS SRV record for dynamic server discovery
> ----------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-4956
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4956
>             Project: ZooKeeper
>          Issue Type: New Feature
>          Components: java client
>         Environment: * 
>            Reporter: Li Wang
>            Priority: Major
>
> Currently, ZooKeeper clients use static configuration of server endpoints through connection strings. This creates operational challenges in dynamic environments like cloud deployments, container orchestration platforms, and auto-scaling scenarios. 
> For example, server topology change requires updating all client configurations and potentially restarting al client applications.
> This ticket provides a `DnsSrvHostProvider` that leverages DNS SRV records for dynamic service discovery, allowing clients to automatically discover ZooKeeper servers without hardcoded configuration.



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