[FLINK-10239] Register eventtime timer only once in eventtrigger

• Type: Improvement
• Status: Reopened
• Priority: Not a Priority
• Resolution: Unresolved
• Affects Version/s: 1.5.3
• Component/s: API / DataStream
• Assignee: Unassigned
• Reporter: Jiayi Liao
• Created: 29/Aug/18 03:59
• Updated: 29/Jul/21 07:36

Description

I find that we call ctx.registerEventTimeTimer(window.maxTimestamp()) every time when an element is received in the window. Even though it doesn't affect the result because it uses a Set, but I think it can still be an improvement if we call it only once.