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https://issues.apache.org/jira/browse/MESOS-3977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15021958#comment-15021958
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Neil Conway commented on MESOS-3977:
------------------------------------
I believe that logic is ensuring that, if an outstanding offer shares no
resources in common with the required resources, we don't try to rescind the
offer. i.e., doesn't seem related as far as I can tell.
> http::_operation() creates unnecessary filter, rescinds unnecessarily
> ---------------------------------------------------------------------
>
> Key: MESOS-3977
> URL: https://issues.apache.org/jira/browse/MESOS-3977
> Project: Mesos
> Issue Type: Bug
> Reporter: Neil Conway
> Priority: Minor
> Labels: mesosphere, reservations
>
> This function is used by the /reserve, /unreserve, /create-volume, and
> /destroy-volume endpoints. It has a few worts:
> 1. It installs a 5-second filter when rescinding an offer. However, the
> cluster state might change so that the filter is actually undesirable. For
> example, this scenario:
> * Create DR, make offer
> * Create PV => rescinds previous offer, sets filter, makes offer
> * Destroy PV => rescinds previous offer
> After the last step, we'll wait 5 seconds for the filter to expire before
> re-offering the DR.
> 2. If there are sufficient available resources at the target slave, we don't
> actually need to rescind any offers in the first place. However, _operation()
> rescinds offers unconditionally.
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