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Posted to issues@flink.apache.org by "Andrey Zagrebin (Jira)" <ji...@apache.org> on 2020/07/28 11:19:00 UTC
[jira] [Closed] (FLINK-18646) Managed memory released check can
block RPC thread
[ https://issues.apache.org/jira/browse/FLINK-18646?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrey Zagrebin closed FLINK-18646.
-----------------------------------
Release Note:
merged into master by 3d056c8fea72ca40b663d12570913679be87c0a9
merged into 1.10 by bcc97082639280ab14f465463fb07b27167c37e3
Resolution: Fixed
> Managed memory released check can block RPC thread
> --------------------------------------------------
>
> Key: FLINK-18646
> URL: https://issues.apache.org/jira/browse/FLINK-18646
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Task
> Affects Versions: 1.11.0
> Reporter: Andrey Zagrebin
> Assignee: Andrey Zagrebin
> Priority: Critical
> Labels: pull-request-available
> Fix For: 1.11.2
>
> Attachments: log1.png, log2.png
>
>
> UnsafeMemoryBudget#verifyEmpty, called on slot freeing, needs time to wait on GC of all allocated/released managed memory. If there are a lot of segments to GC then it can take time to finish the check. If slot freeing happens in RPC thread, the GC waiting can block it and TM risks to miss its heartbeat.
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