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https://issues.apache.org/jira/browse/MESOS-3977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15020360#comment-15020360
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Guangya Liu commented on MESOS-3977:
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[~neilc] I think that the {{http::_operation()}} already make some checking for
this in
https://github.com/apache/mesos/blob/master/src/master/http.cpp#L2128-L2133 ,
if there are enough resources on the slave, then the operation will not rescind
offers. Comments?
> 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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