[IGNITE-12274] [ML] DecisionTree works incorrectly if maxDeep > amount of features

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: ml
• Ignite Flags: Docs Required, Release Notes Required
• Assignee: Alexey Zinoviev
• Reporter: Alexey Zinoviev
• Created: 09/Oct/19 11:20
• Updated: 29/Dec/20 08:57

Description

We have a problem in two places: 

null nodes could be created here MeanDecisionTreeLeafBuilder.createLeafNode method in the row return aa != null ? new DecisionTreeLeafNode(aa[0]) : null;

Probably, this situation is arising then the amount of features is smaller than maxDeep

Issue Links

• is related to: IGNITE-12269 [ML] The method printTree is corrupted on the example