Weiwei Yang created YUNIKORN-677:
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Summary: Potential resource leak when complete and allocate pod
happens simultaneously
Key: YUNIKORN-677
URL: https://issues.apache.org/jira/browse/YUNIKORN-677
Project: Apache YuniKorn
Issue Type: Bug
Reporter: Weiwei Yang
Let's say we have an app that has 1 pod needs for scheduling. The shim submits
an app to the core, and start the schedule the pod. In the shim side, this is a
task in the Scheduling state. Then we have a race if the following things
happen simultaneously:
# User deletes the pod, this triggers a CompleteTask event in the shim side,
and the shim will send a ReleaseAllocationAskRequest to the core.
# Before handling the ReleaseAllocationAskRequest from the shim, the core made
an allocation for the given pod and send an Allocation to the shim
then the core generates an allocation on a node, core receives the release
request and deletes the pending ask; the shim side receives the new allocation,
but since the pod has already been deleted so the shim ignores this allocation.
In this case, the allocation will be left-over causing the resource leak.
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