[SPARK-18729] MemorySink should not call DataFrame.collect when holding a lock

• Type: Improvement
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.1.0
• Component/s: Structured Streaming
• Target Version/s: 2.1.0
• Assignee: Shixiong Zhu
• Reporter: Shixiong Zhu
• Created: 05/Dec/16 23:46
• Updated: 06/Dec/16 02:16
• Resolved: 06/Dec/16 02:16

Description

Otherwise, other threads cannot query the content in MemorySink when `DataFrame.collect` takes long time to finish.

Issue Links

• links to: [Github] Pull Request #16162 (zsxwing)