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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-6307) Support reading on un-closed SequenceFile
Date Tue, 01 Dec 2009 22:47:20 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-6307?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo (Nicholas), SZE updated HADOOP-6307:
-------------------------------------------

    Attachment: c6307_20091201.patch

Thanks, Arun!

c6307_20091201.patch: updated with the review comment.

> Support reading on un-closed SequenceFile
> -----------------------------------------
>
>                 Key: HADOOP-6307
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6307
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: io
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>         Attachments: c6307_20091124.patch, c6307_20091130.patch, c6307_20091201.patch
>
>
> When a SequenceFile.Reader is constructed, it calls fs.getFileStatus(file).getLen().
 However, fs.getFileStatus(file).getLen() does not return the hflushed length for un-closed
file since the Namenode does not know the hflushed length.  DFSClient have to ask a datanode
for the length last block which is being written; see also HDFS-570.

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