[YARN-4722] AsyncDispatcher logs redundant event queue sizes

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.8.0, 2.7.3, 2.6.5, 3.0.0-alpha1
• Target Version/s: 2.7.3
• Hadoop Flags: Reviewed
• Assignee: Jason Darrell Lowe
• Reporter: Jason Darrell Lowe
• Created: 23/Feb/16 15:18
• Updated: 06/Jan/17 08:03
• Resolved: 24/Feb/16 17:40

Description

A fairly common occurrence in RM logs is a string of redundant event-queue logs like the following which does little except bloat the logs:

2016-02-23 08:00:00,948 [IPC Server handler 36 on 8030] INFO event.AsyncDispatcher: Size of event-queue is 1000
2016-02-23 08:00:00,948 [IPC Server handler 36 on 8030] INFO event.AsyncDispatcher: Size of event-queue is 1000
2016-02-23 08:00:00,948 [IPC Server handler 36 on 8030] INFO event.AsyncDispatcher: Size of event-queue is 1000
2016-02-23 08:00:00,948 [IPC Server handler 36 on 8030] INFO event.AsyncDispatcher: Size of event-queue is 1000
2016-02-23 08:00:00,948 [IPC Server handler 36 on 8030] INFO event.AsyncDispatcher: Size of event-queue is 1000
[...]