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https://issues.apache.org/jira/browse/HDFS-5988?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-5988 started by Andrew Wang.
> Bad fsimage generated after upgrade
> -----------------------------------
>
> Key: HDFS-5988
> URL: https://issues.apache.org/jira/browse/HDFS-5988
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.4.0
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Priority: Blocker
> Attachments: hdfs-5988-1.patch
>
>
> Internal testing revealed an issue where, after upgrading from an earlier
> release, we always fail to save a correct PB-based fsimage (namely, missing
> inodes leading to an inconsistent namespace). This results in substantial
> data loss, since the upgraded fsimage is broken, as well as the fsimages
> generated by saveNamespace and checkpointing.
> This ended up being a bug in the old fsimage loading code, patch coming.
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