[SPARK-18852] StreamingQuery.lastProgress should be null when recentProgress is empty

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.0
• Fix Version/s: 2.1.0
• Component/s: Structured Streaming
• Assignee: Shixiong Zhu
• Reporter: Shixiong Zhu
• Created: 13/Dec/16 22:34
• Updated: 14/Dec/16 21:37
• Resolved: 14/Dec/16 21:37

Description

Right now it throws NoSuchElementException and it's hard to be used in Python since Python user will just see Py4jError.

Issue Links

• links to: [Github] Pull Request #16273 (zsxwing)