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Posted to issues@flink.apache.org by "Samrat Deb (Jira)" <ji...@apache.org> on 2023/04/27 17:21:00 UTC
[jira] [Commented] (FLINK-31080) Idle slots are not released due to a mismatch in time between DeclarativeSlotPoolService and SlotSharingSlotAllocator
[ https://issues.apache.org/jira/browse/FLINK-31080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17717308#comment-17717308 ]
Samrat Deb commented on FLINK-31080:
------------------------------------
[~Weijie Guo] we have worked internally to fix this bug.
If you are fine , can i share the patch to flink ?
cc: [~prabhujoseph]
> Idle slots are not released due to a mismatch in time between DeclarativeSlotPoolService and SlotSharingSlotAllocator
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-31080
> URL: https://issues.apache.org/jira/browse/FLINK-31080
> Project: Flink
> Issue Type: Bug
> Affects Versions: 1.17.0, 1.16.1
> Reporter: Prabhu Joseph
> Assignee: Weijie Guo
> Priority: Major
>
> Due to a timing mismatch between {{DeclarativeSlotPoolService}} and {{{}SlotSharingSlotAllocator{}}}, idle slots are not released.
> {{DeclarativeSlotPoolService}} uses {{{}SystemClock#relativeTimeMillis{}}}, i.e., {{{}System.nanoTime{}}}() / 1_000_000, while offering a slot, whereas {{SlotSharingSlotAllocator}} uses {{{}System.currentTimeMillis{}}}() while freeing the reserved slot.
> The idle timeout check fails wrongly as "{{{}System.currentTimeMillis(){}}}" will have a very high value compared to "{{{}SystemClock#relativeTimeMillis{}}}".
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