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From "Tanping Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-1881) After taking snapshot (upgrade) on Federation, the current directory of data node is emtpy.
Date Mon, 09 May 2011 22:57:03 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1881?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tanping Wang updated HDFS-1881:
-------------------------------

    Attachment: HDFS-1881.patch

The problem was that when doing upgrade for BlockPoolSliceStorage we were hard linking between
incorrect directories.

> After taking snapshot (upgrade) on Federation,  the current directory of data node is
emtpy.
> --------------------------------------------------------------------------------------------
>
>                 Key: HDFS-1881
>                 URL: https://issues.apache.org/jira/browse/HDFS-1881
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Tanping Wang
>            Assignee: Tanping Wang
>         Attachments: HDFS-1881.patch
>
>
> After taking a snapshot in Federation (by starting up namenode with option -upgrade),
it appears that the current directory of data node does not contain the block files.  We have
also verified that upgrading from 20 to Federation does not have this problem.

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