Github user srowen commented on the issue: https://github.com/apache/spark/pull/18805 It's dual-licensed (see bottom of https://github.com/facebook/zstd/blob/v1.3.1/README.md ) and one is 3-clause BSD. This is fine as it's a "Category A" license: https://www.apache.org/legal/resolved.html The zstd-jni binding itself is 2-clause BSD, also OK. https://github.com/luben/zstd-jni/blob/master/LICENSE Licenses check out and there's no extra dependencies it drags in. I think this will be OK but we do need to add these two licenses to `licenses/` (see the convention there) and also add a line for each in `LICENSE` here.
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