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https://issues.apache.org/jira/browse/HDFS-12681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17424262#comment-17424262
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Wei-Chiu Chuang commented on HDFS-12681:
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For future reference, this change breaks source compatibility due to the
FileStatus.flags() and FileStatus.setSnapShotEnabledFlag () added by HDFS-12455.
Affected version: Hadoop 3.0.3.
> Make HdfsLocatedFileStatus a subtype of LocatedFileStatus
> ---------------------------------------------------------
>
> Key: HDFS-12681
> URL: https://issues.apache.org/jira/browse/HDFS-12681
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Christopher Douglas
> Assignee: Christopher Douglas
> Priority: Major
> Fix For: 3.1.0
>
> Attachments: HDFS-12681.00.patch, HDFS-12681.01.patch,
> HDFS-12681.02.patch, HDFS-12681.03.patch, HDFS-12681.04.patch,
> HDFS-12681.05.patch, HDFS-12681.06.patch, HDFS-12681.07.patch,
> HDFS-12681.08.patch, HDFS-12681.09.patch, HDFS-12681.10.patch,
> HDFS-12681.11.patch, HDFS-12681.12.patch, HDFS-12681.13.patch,
> HDFS-12681.14.patch, HDFS-12681.15.patch, HDFS-12681.16.patch
>
>
> {{HdfsLocatedFileStatus}} is a subtype of {{HdfsFileStatus}}, but not of
> {{LocatedFileStatus}}. Conversion requires copying common fields and shedding
> unknown data. It would be cleaner and sufficient for {{HdfsFileStatus}} to
> extend {{LocatedFileStatus}}.
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