[MESOS-2808] Slave should call into resource estimator whenever it wants to forward oversubscribed resources

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.23.0
• Epic Link: Oversubscription
• Sprint: Twitter Q2 Sprint 3
• Story Points: 3
• Assignee: Vinod Kone
• Reporter: Vinod Kone
• Created: 03/Jun/15 20:59
• Updated: 04/Jun/15 00:45
• Resolved: 04/Jun/15 00:45

Description

Currently, the polling of resource estimator is decoupled from the loop in the slave that forwards oversubscribed resources.

Now that the slave only sends updates when there is a change from the previous estimate, it can just poll the resource estimator whenever it wants to send an estimate. One advantage with this is that if the estimator is slow to respond, the slave doesn't keep forwarding estimates with the stale 'oversubscribable' value causing more revocable tasks to be unintentionally launched.