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Date: Mon, 10 Nov 2014 23:35:34 +0000 (UTC)
From: "Brandon Li (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: <JIRA.12754274.1415659407000.464606.1415662534486@Atlassian.JIRA>
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 <JIRA.12754274.1415659407052@arcas>
Subject: [jira] [Updated] (HDFS-7387) NFS may only do partial commit due to
 a race between COMMIT and write
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     [ https://issues.apache.org/jira/browse/HDFS-7387?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brandon Li updated HDFS-7387:
-----------------------------
    Attachment: HDFS-7387.001.patch

> NFS may only do partial commit due to a race between COMMIT and write
> ---------------------------------------------------------------------
>
>                 Key: HDFS-7387
>                 URL: https://issues.apache.org/jira/browse/HDFS-7387
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: nfs
>    Affects Versions: 2.6.0
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>            Priority: Critical
>         Attachments: HDFS-7387.001.patch
>
>
> The requested range may not be committed when the following happens:
> 1. the last pending write is removed from the queue to write to hdfs
> 2. a commit request arrives, NFS sees there is not pending write, and it will do a sync
> 3. this sync request could flush only part of the last write to hdfs
> 4. if a file read happens immediately after the above steps, the user may not see all the data.


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