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From "Kihwal Lee (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8060) Add a capability to use of consistent checksums for append and copy
Date Thu, 22 Mar 2012 20:02:22 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13235960#comment-13235960
] 

Kihwal Lee commented on HADOOP-8060:
------------------------------------

> so the changes are contained in common

Maybe this is confusing. The changes pertaining to the addition of checksum types to CreateFlag
does not necessitate new dependencies that are external to Common. I.e. can be done in a separate
jira and won't break anything alone.
                
> Add a capability to use of consistent checksums for append and copy
> -------------------------------------------------------------------
>
>                 Key: HADOOP-8060
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8060
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs, util
>    Affects Versions: 0.23.0, 0.24.0, 0.23.1
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>             Fix For: 0.24.0, 0.23.2
>
>
> After the improved CRC32C checksum feature became default, some of use cases involving
data movement are no longer supported.  For example, when running DistCp to copy from a file
stored with the CRC32 checksum to a new cluster with the CRC32C set to default checksum, the
final data integrity check fails because of mismatch in checksums.

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