[SPARK-31004] Show message for empty Streaming Queries instead of empty timelines and histograms.

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: Structured Streaming, Web UI
• Assignee: Kousuke Saruta
• Reporter: Kousuke Saruta
• Created: 02/Mar/20 02:54
• Updated: 13/Mar/20 19:59
• Resolved: 13/Mar/20 19:59

Description

If a Streaming Query has no batches, StreamingQueryStatisticsPage shows empty timelines and histograms.
It's ugly and better to show a message that clearly says "No visualization information available".

Issue Links

• links to: GitHub Pull Request #27755