[MADLIB-1161] DT: Trees trained by MADlib < 1.12 fail when predicted on 1.12

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: v1.13
• Component/s: Module: Decision Tree
• Assignee: Unassigned
• Reporter: Rahul Iyer
• Created: 21/Sep/17 20:03
• Updated: 02/Oct/17 19:43
• Resolved: 02/Oct/17 19:43

Description

Report from Scott Gai

After upgrade madlib package from 1.11 to 1.12, the tree decision modles which were trained prior to upgrade started to fail with errors like below

ERROR: KeyError: 'null_proxy' (plpython.c:4656) CONTEXT: Traceback (most recent call last): PL/Python function "tree_predict", line 19, in <module> return decision_tree.tree_predict(**globals()) PL/Python function "tree_predict", line 1759, in tree_predict PL/Python function "tree_predict" ********** Error ********** ERROR: KeyError: 'null_proxy' (plpython.c:4656) SQL state: XX000 Context: Traceback (most recent call last): PL/Python function "tree_predict", line 19, in <module> return decision_tree.tree_predict(**globals()) PL/Python function "tree_predict", line 1759, in tree_predict PL/Python function "tree_predict"