[jira] [Resolved] (YUNIKORN-481) deadlock when removing allocation ask

["Wilfred Spiegelenburg (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YUNIKORN-481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wilfred Spiegelenburg resolved YUNIKORN-481.
--------------------------------------------
    Fix Version/s: 0.10
       Resolution: Fixed

Change has been merged, waiting on YUNIKORN-480 to also merge to be able to progress that one

> 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
>            Priority: Blocker
>              Labels: pull-request-available
>             Fix For: 0.10
>
>
> 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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