chenya-zhang commented on a change in pull request #356:
URL:
https://github.com/apache/incubator-yunikorn-core/pull/356#discussion_r781384680
##########
File path: pkg/scheduler/objects/application.go
##########
@@ -827,13 +827,41 @@ func (sa *Application)
tryPlaceholderAllocate(nodeIterator func() NodeIterator,
if ph.released || request.taskGroupName !=
ph.taskGroupName {
continue
}
+ // before we check anything we need to check the
resources equality
+ delta := resources.Sub(ph.AllocatedResource,
request.AllocatedResource)
+ // Any negative value in the delta means that at least
one of the requested resource in the real
+ // allocation is larger than the placeholder. We need
to cancel the placeholder and check the next
+ // placeholder. This should trigger a cleanup of all
the placeholder as a task group is always one size.
+ if delta.HasNegativeValue() {
+ log.Logger().Warn("releasing placeholder: real
allocation is larger than placeholder",
+ zap.String("requested resource",
request.AllocatedResource.String()),
+ zap.String("placeholderID", ph.UUID),
+ zap.String("placeholder resource",
ph.AllocatedResource.String()))
+ // release the placeholder and tell the RM
+ ph.released = true
+ sa.notifyRMAllocationReleased(sa.rmID,
[]*Allocation{ph}, si.TerminationType_TIMEOUT, "cancel placeholder: resource
incompatible")
Review comment:
> cancel placeholder: resource incompatible
Will it be easier to understand if we say "requested resource larger than
placeholder" directly? "resource incompatible" may also refer to resource type,
unit, etc.
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