dongjoon-hyun edited a comment on issue #27281: [SPARK-30572][BUILD] Add a fallback Maven repository URL: https://github.com/apache/spark/pull/27281#issuecomment-576067171 Hi, @srowen and @maropu . I added the following comment to the `GitHub Action` script. As I wrote in the comment, this PR aims to fix the issue while keeping the existing Jenkins (and downstream) environment unaffected. ``` # `Maven Central` is too flaky in terms of downloading artifacts in `GitHub Action` environment. # `Google Maven Central Mirror` is too slow in terms of sycing upstream. To get the best combination, # 1) we set `Google Maven Central` as a mirror of `central` in `GitHub Action` environment only. # 2) we duplicates `Maven Central` in pom.xml with ID `central_without_mirror`. # In other words, in GitHub Action environment, `central` is mirrored by `Google Maven Central` first. # If `Google Maven Central` doesn't provide the artifact due to its slowness, `central_without_mirror` will be used. # Note that we aim to achieve the above while keeping the existing behavior of non-`GitHub Action` environment unchanged. ```
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