[SPARK-1965] Spark UI throws NPE on trying to load the app page for non-existent app

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.0.0
• Fix Version/s: 1.4.0
• Component/s: Web UI
• Assignee: Sean R. Owen
• Reporter: Kay Ousterhout
• Created: 29/May/14 19:23
• Updated: 28/Feb/15 15:34
• Resolved: 28/Feb/15 15:34

Description

If you try to load the Spark UI for an application that doesn't exist:

sparkHost:8080/app/?appId=foobar

The UI throws a NPE. The problem is in ApplicationPage.scala – Spark proceeds even if the "app" variable is null. We should handle this more gracefully.

Issue Links

• links to: [Github] Pull Request #4777 (srowen)