[jira] [Commented] (HIVE-21689) Buddy Allocator memory accounting does not account for failed allocation attempts

["slim bouguerra (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-21689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16832949#comment-16832949 ] 

slim bouguerra commented on HIVE-21689:
---------------------------------------

UT can be found here.
https://gist.github.com/b-slim/f12aad2a2406d9ee15f338e0e760d3a5


> Buddy Allocator memory accounting does not account for failed allocation attempts
> ---------------------------------------------------------------------------------
>
>                 Key: HIVE-21689
>                 URL: https://issues.apache.org/jira/browse/HIVE-21689
>             Project: Hive
>          Issue Type: Bug
>          Components: llap
>            Reporter: slim bouguerra
>            Assignee: slim bouguerra
>            Priority: Major
>
> Allocation method on Buddy Allocator, does not release the reserved memory in case we failed to allocate the full sequence.
> Simple example:
> Assume We have an allocation request of 1kb.
> Will call reserver and reserve 1KB.
> Try to allocate will fail due to race condition.
> Try to discard will fail due to no space.
> At this point will exit without releasing the reserved memory.



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