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Posted to issues@mesos.apache.org by "Neil Conway (JIRA)" <ji...@apache.org> on 2015/12/02 21:54:11 UTC
[jira] [Updated] (MESOS-3977) http::_operation() creates
unnecessary filter, rescinds unnecessarily
[ https://issues.apache.org/jira/browse/MESOS-3977?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Neil Conway updated MESOS-3977:
-------------------------------
Description:
This function is used by the /reserve, /unreserve, /create-volumes, and /destroy-volumes 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.
was:
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.
> 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-volumes, and /destroy-volumes 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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