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https://issues.apache.org/jira/browse/HADOOP-14499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16058397#comment-16058397
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Sean Mackrory commented on HADOOP-14499:
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That's from my comment on Jun 8th. Since we currently don't track the last time
at which a directory listing was modified and since it inherently impacts
entries other than itself, there's no way for an implementation to safely prune
directories without raising the concerns you had about doing it here, right?
> Findbugs warning in LocalMetadataStore
> --------------------------------------
>
> Key: HADOOP-14499
> URL: https://issues.apache.org/jira/browse/HADOOP-14499
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Reporter: Sean Mackrory
> Assignee: Sean Mackrory
> Attachments: HADOOP-14499-HADOOP-13345.001.patch,
> HADOOP-14499-HADOOP-13345.002.patch
>
>
> First saw this raised by Yetus on HADOOP-14433:
> {code}
> Bug type UC_USELESS_OBJECT (click for details)
> In class org.apache.hadoop.fs.s3a.s3guard.LocalMetadataStore
> In method org.apache.hadoop.fs.s3a.s3guard.LocalMetadataStore.prune(long)
> Value ancestors
> Type java.util.LinkedList
> At LocalMetadataStore.java:[line 300]
> {code}
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