[GitHub] [kafka] rhauch opened a new pull request #10961: KAFKA-13028: Enable the AbstractConfig to resolve variables in ConfigProviders

[GitBox <gi...@apache.org>]

rhauch opened a new pull request #10961:
URL: https://github.com/apache/kafka/pull/10961


   **DO NOT MERGE UNTIL IT IS DETERMINED WHETHER THIS REQUIRED A KIP.**
   
   See [KAFKA-13028](https://issues.apache.org/jira/browse/KAFKA-13028)
   
   The AbstractConfig constructor is changed to instantiate and configure each ConfigProvider instance
   in the same order as defined by the 'config.providers' property. And when configuring a ConfigProvider,
   it uses any previously-configured ConfigProvider instances to potentially resolve any variables in
   that ConfigProvider's configuration.
   
   New unit tests are added to verify this change in behavior.
   
   ### Committer Checklist (excluded from commit message)
   - [ ] Verify design and implementation 
   - [ ] Verify test coverage and CI build status
   - [ ] Verify documentation (including upgrade notes)
   


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