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https://issues.apache.org/jira/browse/HDFS-3521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13293229#comment-13293229
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Suresh Srinivas commented on HDFS-3521:
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+1 for the patch. Thanks for fixing the secondary namenode issue.
> Allow namenode to tolerate edit log corruption
> ----------------------------------------------
>
> Key: HDFS-3521
> URL: https://issues.apache.org/jira/browse/HDFS-3521
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: h3521_20120610_b-1.patch, h3521_20120611_b-1.patch
>
>
> HDFS-3479 adds checking for edit log corruption. It uses a fixed
> UNCHECKED_REGION_LENGTH (=PREALLOCATION_LENGTH) so that the bytes at the end
> within the length is not checked. Instead of not checking the bytes, we
> should check everything and allow toleration.
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