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https://issues.apache.org/jira/browse/FLINK-37107?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17913536#comment-17913536
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Zakelly Lan commented on FLINK-37107:
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Merge into master via e3c28414...9da368d6
> Allow buffer overdraft in async state processing
> ------------------------------------------------
>
> Key: FLINK-37107
> URL: https://issues.apache.org/jira/browse/FLINK-37107
> Project: Flink
> Issue Type: Sub-task
> Reporter: Zakelly Lan
> Assignee: Zakelly Lan
> Priority: Major
>
> In FLINK-37089, we resolved the deadlock of derived requests waiting on
> draining current request, when user call `asyncProcessWithKey`. However, we
> also found the timer may also suffer from this problem. Thus I suggest a
> buffer overdraft for all those derived requests, to resolve the deadlock when
> there is a single hotspot key and all the requests queue in line while there
> comes a derived with same key, that cannot properly queue in a full buffer.
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