caoli created SPARK-2152:
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Summary: the error of comput rightNodeAgg about Decision tree
algorithm in Spark MLlib
Key: SPARK-2152
URL: https://issues.apache.org/jira/browse/SPARK-2152
Project: Spark
Issue Type: Bug
Affects Versions: 1.0.0
Environment: windows7 ,32 operator,and 3G mem
Reporter: caoli
the error of comput rightNodeAgg about Decision tree algorithm in Spark
MLlib about the function extractLeftRightNodeAggregates() ,when compute
rightNodeAgg used bindata index is error. in the DecisionTree.scala file about
Line 980:
rightNodeAgg(featureIndex)(2 * (numBins - 2 - splitIndex)) =
binData(shift + (2 * (numBins - 2 - splitIndex))) +
rightNodeAgg(featureIndex)(2 * (numBins - 1 - splitIndex))
the binData(shift + (2 * (numBins - 2 - splitIndex))) index compute is
error, so the result of rightNodeAgg include repeated data about "bins"
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