Wilfred Spiegelenburg created YUNIKORN-481:
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Summary: deadlock when removing allocation ask
Key: YUNIKORN-481
URL: https://issues.apache.org/jira/browse/YUNIKORN-481
Project: Apache YuniKorn
Issue Type: Bug
Components: core - scheduler
Affects Versions: 0.10
Reporter: Wilfred Spiegelenburg
Assignee: Wilfred Spiegelenburg
A new deadlock was introduced in the scheduler as part of the refactor.
The deadlock can occur when an allocationAsk is removed from an application
while the application is scheduled at the same point in time.
The removeAllocationAsk() call in the partitionContext is a write locked call
taking the context lock it later tries to take the application write lock.
While scheduling to check the nodes we are retrieving the node iterator from
the partition. This retrieval is done by a write locked application which needs
a read lock on the partition.
The removal of the ask should not hold the write lock on the partition while
updating the application.
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