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Posted to common-issues@hadoop.apache.org by "Arun C Murthy (JIRA)" <ji...@apache.org> on 2012/10/11 19:45:34 UTC

[jira] [Closed] (HADOOP-8703) distcpV2: turn CRC checking off for 0 byte size

     [ https://issues.apache.org/jira/browse/HADOOP-8703?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy closed HADOOP-8703.
---------------------------------

    
> 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, 2.0.2-alpha
>
>         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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