[SLIDER-817] track unplaced outstanding requests

• Type: Sub-task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Slider 0.70
• Fix Version/s: Slider 0.91
• Component/s: appmaster
• Sprint: Slider Feb #1, Slider April #1
• Assignee: Steve Loughran
• Reporter: Steve Loughran
• Created: 16/Mar/15 20:12
• Updated: 13/Jun/16 21:31
• Resolved: 25/Mar/15 10:47

Description

Unplaced requests should be tracked too: time requested & number (simple solution: a list of OutstandingRequests without hosts in a separate data structure).

Lets REST/web views see more on the history of the cluster, such as when new containers were requested.

Because there's no way to match up allocations with these outstanding requests, they can just be deleted oldest-first in the list.