[SPARK-19733] ALS performs unnecessary casting on item and user ids

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0, 2.0.1, 2.1.0
• Fix Version/s: 2.2.0
• Component/s: ML
• Assignee: Vasilis Vryniotis
• Reporter: Vasilis Vryniotis
• Created: 25/Feb/17 00:07
• Updated: 02/Mar/17 10:39
• Resolved: 02/Mar/17 10:38

Description

The ALS is performing unnecessary casting to the user and item ids (to double). I believe this is because the protected checkedCast() method requires a double input. This can be avoided by refactroing the code of checkedCast method.

Issue resolved by pull-request 17059:
https://github.com/apache/spark/pull/17059

Issue Links

• links to: [Github] Pull Request #17059 (datumbox)