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https://issues.apache.org/jira/browse/HADOOP-4885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13230297#comment-13230297
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Brandon Li commented on HADOOP-4885:
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I did manual tests before including the unit tests in the backport patch.
The new edit log is immediately created in the new storage directory, but the
rolled edit log doesn't exist in the recovered storage directory. From the NN
UI, the healthy storage directory and recovered directory both have "Active"
status. This is why I said it's "misleading".
It would be a more obvious problem when the storage directory is a fsimage only
directory. From the NN UI/JMX, the administrator can't tell which "Active"
storage directory has fsimage inside and which doesn't. The same "Active" state
here means differently at differnt time with different directories.
> Try to restore failed replicas of Name Node storage (at checkpoint time)
> ------------------------------------------------------------------------
>
> Key: HADOOP-4885
> URL: https://issues.apache.org/jira/browse/HADOOP-4885
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Boris Shkolnik
> Assignee: Boris Shkolnik
> Fix For: 0.21.0
>
> Attachments: HADOOP-4885-1.patch, HADOOP-4885-3.patch,
> HADOOP-4885-3.patch, HADOOP-4885.branch-1.patch,
> HADOOP-4885.branch-1.patch.2, HADOOP-4885.branch-1.patch.3,
> HADOOP-4885.patch, HADOOP-4885.patch
>
>
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