[FLINK-8625] Move OutputFlusher thread to Netty scheduled executor

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Abandoned
• Component/s: Runtime / Network
• Labels: auto-unassigned stale-major
• Assignee: Unassigned
• Reporter: Piotr Nowojski
• Created: 09/Feb/18 13:09
• Updated: 23/Jun/21 07:37
• Resolved: 23/Jun/21 07:37

Description

This will allow us to trigger/schedule next flush only if we are not currently busy. 

PR: https://github.com/apache/flink/pull/6698