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https://issues.apache.org/jira/browse/HDFS-1496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12931589#action_12931589
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Hairong Kuang commented on HDFS-1496:
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This turns out to be a bug in storage directory restoration. Image validation
exposes the error.
Currently NN uses rollFSEdits to trigger storage directory recovery. The
recovery may trigger a saving of the namespace to the newly restored directory
which as a result changes in memory image digest. However later on image &
edits were fetched from an old storage directory, thus causing the checksum
mismatch.
The problem with this storage restoration scheme is that it makes the on-disk
state of all storage directories inconsistent.
> TestStorageRestore is failing after HDFS-903 fix
> ------------------------------------------------
>
> Key: HDFS-1496
> URL: https://issues.apache.org/jira/browse/HDFS-1496
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Reporter: Konstantin Boudnik
> Assignee: Hairong Kuang
>
> TestStorageRestore seems to be failing after HDFS-903 commit. Running git
> bisect confirms it.
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