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List:       mesos-issues
Subject:    [jira] [Commented] (MESOS-3202) Avoid role/framework offer starvation in DRF allocator.
From:       "Meng Zhu (JIRA)" <jira () apache ! org>
Date:       2018-06-27 22:49:00
Message-ID: JIRA.12851457.1438712330000.28397.1530139740417 () Atlassian ! JIRA
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    [ https://issues.apache.org/jira/browse/MESOS-3202?page=com.atlassian.jira.plugin. \
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Meng Zhu commented on MESOS-3202:
---------------------------------

We have landed 
MESOS-8936 Implement a Random Sorter for offer allocations. Closing this one.

> Avoid role/framework offer starvation in DRF allocator.
> -------------------------------------------------------
> 
> Key: MESOS-3202
> URL: https://issues.apache.org/jira/browse/MESOS-3202
> Project: Mesos
> Issue Type: Bug
> Reporter: Jörg Schad
> Priority: Major
> 
> We currently run into issues with the DRF scheduler that frameworks do not receive \
> offers (see https://github.com/mesosphere/marathon/issues/1931 for details).  \
> Imagine that we have 10 frameworks and unallocated resources from a single slave. \
> Allocation interval is 1 sec, and refuse_seconds (i.e. the time for which a \
> declined resource is filtered) is 3 sec across all frameworks.  Allocator offers \
> resources to framework 1 (according to DRF) which declines the offer immediately.  \
> In the next allocation interval framework 1 is skipped due to the declined offer \
> before. Hence the next framework 2 is offered the resources, which it also \
> declines. The same procedure in the next allocation interval (with framework 3). 
> In the next allocation interval the refuse_seconds for framework 1 are over, and as \
> it still has the lowest DRF share it gets the resource offered again, which it \
> again declines. And the cycle begins again.... Framework 4 (which is actually \
> waiting for this resource) is never offered this resource. 



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