[jira] Created: (HDFS-570) When opening a file for read, make the file length avaliable to client.

[Tsz Wo (Nicholas), SZE (JIRA)]

When opening a file for read, make the file length avaliable to client.
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                 Key: HDFS-570
                 URL: https://issues.apache.org/jira/browse/HDFS-570
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: hdfs client
    Affects Versions: Append Branch
            Reporter: Tsz Wo (Nicholas), SZE
            Assignee: Tsz Wo (Nicholas), SZE
             Fix For: Append Branch


In order to support read consistency, DFSClient needs the file length at the 
file opening time.

For more details, see Section 4 in the [append design 
doc|https://issues.apache.org/jira/secure/attachment/12415768/appendDesign2.pdf].

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