## What is the purpose of the change The S3 connectors are based on a self-contained shaded Hadoop. By design, they should only use config value from the Flink configuration.
However, because Hadoop loads implicitly configs from the classpath, existing "core-site.xml" files can interfere with the configuration in ways in-transparent for the user. This PR ensure such configs are not loaded. ## Brief change log - The testing configs are renamed to "core-default-testing.xml" - The shaded adjusted config loading ignores "core-site.xml" files but loads "core-default-testing.xml" files ## Verifying this change - Includes a test by adding an improper "core-site.xml" to the test class path. If that file was loaded, the existing tests would fail. ## Does this pull request potentially affect one of the following parts: - Dependencies (does it add or upgrade a dependency): **no** - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: **no** - The serializers: **no** - The runtime per-record code paths (performance sensitive): **no** - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: **no** - The S3 file system connector: **yes** ## Documentation - Does this pull request introduce a new feature? **no** - If yes, how is the feature documented? **no** [ Full content available at: https://github.com/apache/flink/pull/6728 ] This message was relayed via gitbox.apache.org for [email protected]
