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https://issues.apache.org/jira/browse/HADOOP-6017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12720277#action_12720277
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Allen Wittenauer commented on HADOOP-6017:
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Looking at the patch, this appears to only fix input/output validation. How do
we deal with our currently corrupted edits file? This patch needs to fix that
as well!
> NameNode and SecondaryNameNode fail to restart because of abnormal filenames.
> -----------------------------------------------------------------------------
>
> Key: HADOOP-6017
> URL: https://issues.apache.org/jira/browse/HADOOP-6017
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.18.3
> Reporter: Raghu Angadi
> Assignee: Tsz Wo (Nicholas), SZE
> Priority: Blocker
> Fix For: 0.18.4, 0.19.2, 0.20.1, 0.21.0
>
> Attachments: 6017_20090611.patch, 6017_20090611b.patch,
> HADOOP-6017-branch-18.patch, HADOOP-6017-branch-20.patch
>
>
> SecondaryNameNode (and NameNode) fail to load the edits log. I will include
> stack trace in next comment.
> This is traced to the fact that LeaseManager uses {{String.relaceFirst()}} to
> replace front of a sting with another string. Unfortunately
> {{replaceFirst()}} uses regex, though the first argument is {{quoted}} by the
> code, the second argument is not. (the second arg is not really treated as
> regex but still gets processed for back references (as in '{{sed
> s/first/second/g}}')
> As Nicholas suggested, it is just simpler to use {{substring()}} to replace
> part of the string.
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