[jvm-packages] fix "key not found: train" issue #6842
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to fix #6806 |
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@CodingCat Could you please help take a look? |
CodingCat
reviewed
Apr 18, 2021
| @@ -377,7 +377,7 @@ object XGBoost extends Serializable { | |||
| // to workaround the empty partitions in training dataset, | |||
| // this might not be the best efficient implementation, see | |||
| // (https://github.com/dmlc/xgboost/issues/1277) | |||
| if (watches.toMap("train").rowNum == 0) { | |||
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is it possible that there is "train' as the key but it is empty?
I think we'd better keep both
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toMap will filter out DMatrix with rowNum <= 0, https://github.com/dmlc/xgboost/blob/master/jvm-packages/xgboost4j-spark/src/main/scala/ml/dmlc/xgboost4j/scala/spark/XGBoost.scala#L762
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