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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8703) distcpV2: turn CRC checking off for 0 byte size
Date Wed, 15 Aug 2012 20:22:38 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13435485#comment-13435485

Alejandro Abdelnur commented on HADOOP-8703:

Bobby, no worries, not at all. If we'd happen to keep tabs I'd be far in the lead :)
> distcpV2: turn CRC checking off for 0 byte size
> -----------------------------------------------
>                 Key: HADOOP-8703
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8703
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 0.23.3
>            Reporter: Dave Thompson
>            Assignee: Dave Thompson
>             Fix For: 0.23.3, 2.1.0-alpha, 3.0.0
>         Attachments: HADOOP-8703-branch-0.23.patch, HADOOP-8703-branch-0.23.patch
> DistcpV2 (hadoop-tools/hadoop-distcp/..) can fail from checksum failure, sometimes when
copying a 0 byte file. Root cause of this may have to do with an inconsistent nature of HDFS
when creating 0 byte files, however distcp can avoid this issue by not checking CRC when size
is zero.
> This issue was reported as part of HADOOP-8233, though it seems like a better idea to
treat this particular aspect on it's own.

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