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https://issues.apache.org/jira/browse/MESOS-6940?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jay Guo reassigned MESOS-6940:
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Assignee: Jay Guo
> Do not send offers to MULTI_ROLE schedulers if agent does not have MULTI_ROLE
> capability.
> -----------------------------------------------------------------------------------------
>
> Key: MESOS-6940
> URL: https://issues.apache.org/jira/browse/MESOS-6940
> Project: Mesos
> Issue Type: Task
> Components: allocation, master
> Reporter: Benjamin Mahler
> Assignee: Jay Guo
>
> Old agents that do not have the MULTI_ROLE capability cannot correctly
> receive tasks from schedulers that have the MULTI_ROLE capability *and are
> using multiple roles*. In this case, we should not send the offer to the
> scheduler, rather than sending an offer but rejecting the scheduler's
> operations.
> Note also that since we allow a single role scheduler to upgrade into having
> the MULTI_ROLE capability (use of the {{FrameworkInfo.roles}} field) so long
> as they continue to use a single role (in phase 1 of multi-role support the
> roles cannot be changed), we could continue sending offers if the scheduler
> is MULTI_ROLE capable but only uses a single role.
> In phase 2 of multi-role support, we cannot safely allow a MULTI_ROLE
> scheduler to receive resources from a non-MULTI_ROLE agent, so it seems we
> should simply disallow MULTI_ROLE schedulers from receiving offers from
> non-MULTI_ROLE agents, regardless of how many roles the scheduler is using.
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