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https://issues.apache.org/jira/browse/HADOOP-17134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-17134.
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Resolution: Won't Fix
> S3AFileSystem.listLocatedStatu(file) does a LIST even with S3Guard
> ------------------------------------------------------------------
>
> Key: HADOOP-17134
> URL: https://issues.apache.org/jira/browse/HADOOP-17134
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.4.0
> Reporter: Steve Loughran
> Assignee: Mukund Thakur
> Priority: Minor
>
> This is minor and we may want to WONTFIX; noticed during work on directory
> markers.
> If you call listLocatedStatus(file) then a LIST call is always made to S3,
> even when S3Guard is present and has the record to say "this is a file"
> Does this matter enough to fix?
> # The HADOOP-16465 work moved the list before falling back to getFileStatus
> # that listing calls s3guard.listChildren(path) to list the children.
> # which only returns the chlldren of a path, not a record of the path itself.
> # so we get an empty list back, triggering the LIST
> # its only after that LIST fails that we fall back to getFileStatus and hence
> look for the actual file record.
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