[SPARK-39958] Add warning log when unable to load custom metric object

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.4.0
• Fix Version/s: 3.4.0
• Component/s: SQL
• Assignee: L. C. Hsieh
• Reporter: L. C. Hsieh
• Created: 03/Aug/22 02:15
• Updated: 03/Aug/22 07:07
• Resolved: 03/Aug/22 07:07

Description

Currently when SQLAppStatusListener cannot load custom metric object, it silently ignores the error. We better provide a warning log for users.

Issue Links

• links to: [Github] Pull Request #37386 (viirya)