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https://issues.apache.org/jira/browse/HADOOP-18944?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-18944.
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Fix Version/s: 3.5.0
3.4.3
Assignee: Mehakmeet Singh
Resolution: Fixed
> S3A: openfile to set async drain threshold correctly
> ----------------------------------------------------
>
> Key: HADOOP-18944
> URL: https://issues.apache.org/jira/browse/HADOOP-18944
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs/s3
> Affects Versions: 3.3.6
> Reporter: Steve Loughran
> Assignee: Mehakmeet Singh
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.5.0, 3.4.3
>
>
> we are using the wrong default value for the async drain threshold in
> {{org.apache.hadoop.fs.s3a.impl.OpenFileSupport}}
> {code}
> builderSupport.getPositiveLong(ASYNC_DRAIN_THRESHOLD,
> defaultReadAhead))
> {code}
> this means the drain threshold isn't being taken up in random io unless you
> have a very small readahead
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