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https://issues.apache.org/jira/browse/HADOOP-4769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12653978#action_12653978
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Tsz Wo (Nicholas), SZE commented on HADOOP-4769:
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> Could you please elaborate more details. What Data integrity validation?
Check block data and meta data, i.e. verifying checksums.
> DataNode should validate the data integrity of a block before updating it
> -------------------------------------------------------------------------
>
> Key: HADOOP-4769
> URL: https://issues.apache.org/jira/browse/HADOOP-4769
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: 4769_20081203.patch
>
>
> DataNode currently only validate the existence of the block and meta files
> before update. The data integrity of a block should also be validated.
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