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https://issues.apache.org/jira/browse/HDFS-3859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13456233#comment-13456233
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Aaron T. Myers commented on HDFS-3859:
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+1, the patch looks good to me. Good work, Todd.
> QJM: implement md5sum verification
> ----------------------------------
>
> Key: HDFS-3859
> URL: https://issues.apache.org/jira/browse/HDFS-3859
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: QuorumJournalManager (HDFS-3077)
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: hdfs-3859-sha1.txt, hdfs-3859.txt
>
>
> When the QJM passes journal segments between nodes, it should use an md5sum
> field to make sure the data doesn't get corrupted during transit. This also
> serves as an extra safe-guard to make sure that the data is consistent across
> all nodes when finalizing a segment.
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