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https://issues.apache.org/jira/browse/MAPREDUCE-649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12755643#action_12755643
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Chris Douglas commented on MAPREDUCE-649:
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I understand that it counts as a failure after distcp.file.retries attempts.
What's odd is that this retry mechanism only works for mismatched checksums and
not other errors. If there are no empirical data showing that mismatched
checksums are either more common or more likely to succeed with more than one
attempt, why include a separate retry mechanism covering that particular case?
> distcp should validate the data copied
> --------------------------------------
>
> Key: MAPREDUCE-649
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-649
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: distcp
> Reporter: Ravi Gummadi
> Assignee: Ravi Gummadi
> Attachments: d_verify.patch, d_verify649.patch
>
>
> distcp should validate the files copied by checking the checksums, if the
> filesystem supports checksums.
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