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https://issues.apache.org/jira/browse/HDFS-11379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15872744#comment-15872744
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Xiao Chen commented on HDFS-11379:
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It seems from other jiras a backport doesn't need a +1, so with pre-commit not
complaining, I have committed this to branch-2.7.
> DFSInputStream may infinite loop requesting block locations
> -----------------------------------------------------------
>
> Key: HDFS-11379
> URL: https://issues.apache.org/jira/browse/HDFS-11379
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 2.7.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Critical
> Fix For: 2.8.0, 2.7.4, 3.0.0-alpha3
>
> Attachments: HDFS-11379.branch-2.7.patch, HDFS-11379.branch-2.patch,
> HDFS-11379.trunk.patch
>
>
> DFSInputStream creation caches file size and initial range of locations. If
> the file is truncated (or replaced) and the client attempts to read outside
> the initial range, the client goes into a tight infinite looping requesting
> locations for the nonexistent range.
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