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From "Nicolas Spiegelberg (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-1060) Append/flush should support concurrent "tailer" use case
Date Wed, 02 Jun 2010 21:43:57 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1060?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nicolas Spiegelberg updated HDFS-1060:
--------------------------------------

    Affects Version/s: 0.20-append

This should be pulled into the branch-0.20-append branch. 

> Append/flush should support concurrent "tailer" use case
> --------------------------------------------------------
>
>                 Key: HDFS-1060
>                 URL: https://issues.apache.org/jira/browse/HDFS-1060
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node, hdfs client
>    Affects Versions: 0.21.0, 0.22.0, 0.20-append
>            Reporter: Todd Lipcon
>         Attachments: hdfs-1060-tests.txt
>
>
> Several people have a usecase for a writer logging edits and using hflush() while one
or more readers "tails" the file by periodically reopening and seeking to get the latest bytes.
Currently there are several bugs. Using this ticket as a supertask for those bugs (and to
add test cases for this use case)

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