[SPARK-28638] Task summary metrics are wrong when there are running tasks

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 2.4.4, 3.0.0
• Component/s: Web UI
• Assignee: Gengliang Wang
• Reporter: Gengliang Wang
• Created: 06/Aug/19 17:01
• Updated: 12/Aug/19 18:54
• Resolved: 12/Aug/19 18:54

Description

Currently, on requesting summary metrics, cached data are returned if the current number of successful tasks is the same as the cached data.
However, the number of successful tasks is wrong. In `AppStatusStore`, the KVStore is ElementTrackingStore, instead of InMemoryStore. This PR is to fix the class matching.

Issue Links

• links to: GitHub Pull Request #25369