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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-972) distcp can timeout during rename operation to s3
Date Tue, 20 Oct 2009 20:20:59 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12767927#action_12767927

Chris Douglas commented on MAPREDUCE-972:

bq. Should we associate this Jira issue with the short or long-term fix? If long, then we
might make it depend on a FileSystem API change, to support progress callbacks.

It's more of a use case/motivation for the FileSystem API changes. If DistCp were ported to
use new APIs supporting progress updates, then this would be resolved as a side effect, right?

Can this be resolved as a documentation issue? A patch to the DistCp guide can go into 0.21.

> distcp can timeout during rename operation to s3
> ------------------------------------------------
>                 Key: MAPREDUCE-972
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-972
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: distcp
>    Affects Versions: 0.20.1
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>         Attachments: MAPREDUCE-972.2.patch, MAPREDUCE-972.3.patch, MAPREDUCE-972.4.patch,
MAPREDUCE-972.5.patch, MAPREDUCE-972.patch
> rename() in S3 is implemented as copy + delete. The S3 copy operation can perform very
slowly, which may cause task timeout.

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