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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2797) Withdraw CRC upgrade from HDFS
Date Thu, 21 Feb 2008 20:29:19 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Raghu Angadi updated HADOOP-2797:
---------------------------------

    Attachment: HADOOP-2797.patch


Suggested patch is attached. Note that that this is the first time Hadoop has a notion of
versions that are not supported for upgraded. So there are a few non-trivial changes in "version
upgrade" layer..

This does everything except changing {{hadoop-12-dfs-dir.tgz}}. This image will be upgraded
to {{hadoop-14-dfs-dir.tgz}}. So TestDFSUpgradeFromImage fails.

> Withdraw CRC upgrade from HDFS
> ------------------------------
>
>                 Key: HADOOP-2797
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2797
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>    Affects Versions: 0.13.0
>            Reporter: Robert Chansler
>            Assignee: Raghu Angadi
>            Priority: Critical
>             Fix For: 0.17.0
>
>         Attachments: HADOOP-2797.patch
>
>
> HDFS will no longer support upgrades from versions without CRCs for block data. Users
upgrading from version 0.13 or earlier must first upgrade to an intermediate (0.14, 0.15,
0.16) version before upgrade to 0.17 or later.

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