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https://issues.apache.org/jira/browse/HADOOP-5730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12702073#action_12702073
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Konstantin Shvachko commented on HADOOP-5730:
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Three things:
# What happens if all directories are removed on SecondareNameNode?
# Why do you remove directories only if mkdir() fails? What if rename() fails
before mkdir() for example.
# You cannot just remove a list entry while iterating, this will cause
ConcurrentModificationException on the next iteration of the loop.
> SecondaryNameNode: should not throw exception and exit if only one makedir
> failure
> -----------------------------------------------------------------------------------
>
> Key: HADOOP-5730
> URL: https://issues.apache.org/jira/browse/HADOOP-5730
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.19.1
> Reporter: Wang Xu
> Assignee: Wang Xu
> Fix For: 0.19.2
>
> Attachments: secondarynamenode-startcp.patch
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> In CheckpointStorage.startCheckPointing(), if one mkdir failed, it
> will throw an exception and exit.
> However, because the editlog has been closed before, the editStreams
> of FSEditLog of NameNode will becomes empty as a result, which
> will affect any further logSync operations.
> Hence we think it should only print WARN message instead of
> throw the exception
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