[
https://issues.apache.org/jira/browse/HDFS-2872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13215663#comment-13215663
]
Aaron T. Myers commented on HDFS-2872:
--------------------------------------
Hey Colin, it looks like the patch you posted is against trunk, and not
branch-1.
> Add sanity checks during edits loading that generation stamps are
> non-decreasing
> --------------------------------------------------------------------------------
>
> Key: HDFS-2872
> URL: https://issues.apache.org/jira/browse/HDFS-2872
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 1.0.0
> Reporter: Todd Lipcon
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-2872.patch
>
>
> In 0.23 and later versions, we have a txid per edit, and the loading process
> verifies that there are no gaps. Lacking this in 1.0, we can use generation
> stamps as a proxy - the OP_SET_GENERATION_STAMP opcode should never result in
> a decreased genstamp. If it does, that would indicate that the edits are
> corrupt, or older edits are being applied to a newer checkpoint, for example.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
