[jira] [Assigned] (KAFKA-7700) AbstractConfig does not honor Properties defaults

["Tommy Becker (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-7700?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tommy Becker reassigned KAFKA-7700:
-----------------------------------

    Assignee:     (was: Tommy Becker)

> AbstractConfig does not honor Properties defaults
> -------------------------------------------------
>
>                 Key: KAFKA-7700
>                 URL: https://issues.apache.org/jira/browse/KAFKA-7700
>             Project: Kafka
>          Issue Type: Bug
>          Components: config
>    Affects Versions: 2.1.0
>            Reporter: Tommy Becker
>            Priority: Minor
>
> Kafka clients such as the Consumer and Producer require various configuration parameters to work. In the case of the Consumer and Producer, these parameters are provided by passing either a {{Map<String, ?>}} or {{Properties}} instance to the respective constructor.
> {{Properties}} is a legacy class (akin to {{Vector)}} that adds no value above {{Map<String, ?>}} other than the ability to wrap another {{Properties}} instance that provides defaults. But Kafka negates this benefit by treating the {{Properties}} instance as a {{Map}}, which only works due to an unfortunate decision to have {{Properties}} extend {{Hashtable}}.  Such treatment bypasses the defaults because they are only consulted by {{Properties.getProperty()}}. The net result is that when creating Kafka clients via {{Properties}}, any configuration from its defaults is ignored.
> This has been reported several times over the years as KAFKA-1909, KAFKA-2184, KAFKA-3049, and KAFKA-5514. 



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