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https://issues.apache.org/jira/browse/HADOOP-89?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12539814
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dhruba borthakur commented on HADOOP-89:
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That was what was decided in the last group meeting between you, me, Owen,
Sameer, etc. That's why I introduced the changes to FsShell.java.






> files are not visible until they are closed
> -------------------------------------------
>
>                 Key: HADOOP-89
>                 URL: https://issues.apache.org/jira/browse/HADOOP-89
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.1.0
>            Reporter: Yoram Arnon
>            Assignee: dhruba borthakur
>            Priority: Critical
>             Fix For: 0.15.0
>
>         Attachments: tail.patch, tail3.patch, tail4.patch
>
>
> the current behaviour, whereby a file is not visible until it is closed has 
> several flaws,including:
> 1. no practical way to know if a file/job is progressing
> 2. no way to implement files that never close, such as log files
> 3. failure to close a file results in loss of the file
> The part of the file that's written should be visible.

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