[FLINK-5681] Make ReaperThread for SafetyNetCloseableRegistry a singleton

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.2.1, 1.3.0
• Component/s: Core
• Assignee: Stefan Richter
• Reporter: Stefan Richter
• Created: 27/Jan/17 18:50
• Updated: 30/Jan/17 16:53
• Resolved: 30/Jan/17 16:53

Description

Currently, each SafetyNetCloseableRegistry spawns an own ReaperThread. However, this duty could also be fulfilled by a single ReaperThread that is shared by all registries to save unnecessary threads.

Issue Links

• links to: GitHub Pull Request #3230