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https://issues.apache.org/jira/browse/YUNIKORN-1546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17685602#comment-17685602
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Wilfred Spiegelenburg commented on YUNIKORN-1546:
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{quote}This reminds me the recovery scenario in YARN/FS. I believe the solution
(which, I think was yours) is that running applications for which no queue can
be determined are moved to a queue named "root.recovery". Maybe we can do
something similar during leaf->parent conversion, like moving them under a
queue named "root.preserved". Question is, do we apply some resource limits to
this queue, and if so, what limits?
{quote}
That was my solution in YARN. Ii think we need a similar solution in YuniKorn.
Resource limits: setting an artificial limit is going to be tricky. The queue
should never get any new applications after the recovery. I think we need to
let it run without a limit. We even need to think about preemption of those
applications and allocations..
> [Umbrella] Allow changing queue type: parent to leaf and back
> -------------------------------------------------------------
>
> Key: YUNIKORN-1546
> URL: https://issues.apache.org/jira/browse/YUNIKORN-1546
> Project: Apache YuniKorn
> Issue Type: New Feature
> Components: core - common
> Reporter: Wilfred Spiegelenburg
> Assignee: Peter Bacsko
> Priority: Major
> Attachments: TestUpdateQueues2.patch
>
>
> In certain cases we would like to allow changing the queue type from a parent
> to a leaf or the other way around in one update.
> Currently there is no way to change the type and it will throw an error when
> tried. That means two updates need to be made to first remove and then add
> the same queue with a different type. This is only important for managed
> queues, i.e. queues in the config. Dynamic queues should not allow type
> changes as they are removed when empty.
> * parent to leaf: only if no children are registered for the parent
> * leaf to parent: only of no applications are running in the queue
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