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https://issues.apache.org/jira/browse/HDFS-7888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14388056#comment-14388056
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Li Bo commented on HDFS-7888:
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HDFS-7888-trunk-001.patch fixes the two problems.
> Change DataStreamer/DFSOutputStream/DFSPacket for convenience of subclassing
> ----------------------------------------------------------------------------
>
> Key: HDFS-7888
> URL: https://issues.apache.org/jira/browse/HDFS-7888
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Li Bo
> Assignee: Li Bo
> Attachments: HDFS-7888-001.patch, HDFS-7888-trunk-001.patch
>
>
> HDFS-7793 refactors class {{DFSOutputStream}} on trunk which makes
> {{DFSOutputStream}} a class without any inner classes. We want to subclass
> {{DFSOutputStream}} to support striping layout writing. This JIRA depends
> upon HDFS-7793 and tries to change DataStreamer/DFSOutputStream/DFSPacket for
> convenience of subclassing.
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