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https://issues.apache.org/jira/browse/HDFS-878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12835356#action_12835356
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Zheng Shao commented on HDFS-878:
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Hairong, I guess you mean DFSInputStream provides the visible length and "under
construction" information?
I will open a JIRA for the "under construction" information for HDFS and HFTP.
> FileStatus should have a field "isUnderConstruction"
> ----------------------------------------------------
>
> Key: HDFS-878
> URL: https://issues.apache.org/jira/browse/HDFS-878
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: Zheng Shao
> Assignee: Zheng Shao
>
> Currently DFSClient has no way to know whether a file is under construction
> or not, unless we open the file and get locatedBlocks (which is much more
> costly).
> However, the namenode knows whether each INode is under construction or not.
> We should expose that information from NameNode.getListing(), to
> DFSClient.listPaths(), to DistributedFileSystem.listStatus().
> We should also expose that information through DFSInputStream and
> DFSDataInputStream if not there yet.
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