Bobby Wang b81ebbef62
[jvm-packages] Fix json4s binary compatibility issue (#7376)
Spark 3.2 depends on 3.7.0-M11 which has changed some implicited functions'
signatures. And it will result the xgboost4j built against spark 3.0/3.1
failed when saving the model.
2021-10-30 03:20:57 +08:00
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