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https://issues.apache.org/jira/browse/HDFS-1029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved HDFS-1029.
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Resolution: Fixed
This is likely a stale issue. Closing. Reopen if you feel otherwise.
> Image corrupt with number of files = 1
> --------------------------------------
>
> Key: HDFS-1029
> URL: https://issues.apache.org/jira/browse/HDFS-1029
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 0.20.1
> Reporter: Todd Lipcon
>
> Last week I recovered a corrupt namenode image that was completely sane
> except that the "number of files" in the header was set to 1, rather than the
> correct number (many million). The NN in question had been running for some
> time, so I believe the 2NN uploaded this broken image as a checkpoint. After
> this point, of course, no further checkpoints occurred, and the NN failed to
> load its image upon restart.
> Not sure how this happens - my only thought is that we may need to add
> synchronization on the nsCount field in INodeDirectoryWithQuota, but that's a
> long shot.
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