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https://issues.apache.org/jira/browse/HDFS-878?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zheng Shao updated HDFS-878:
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Description:
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.
was:
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().
> 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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