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https://issues.apache.org/jira/browse/HDFS-5709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13891872#comment-13891872
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Aaron T. Myers commented on HDFS-5709:
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The javadoc issue is unrelated and is tracked by HADOOP-10325. The
TestAuditLogs failure is spurious and is tracked by HDFS-5882. The
TestDFSUpgradeFromImage failure is because we need to include the new binary
file in order for that to pass.
Given that, I'm going to commit this momentarily.
> Improve NameNode upgrade with existing reserved paths and path components
> -------------------------------------------------------------------------
>
> Key: HDFS-5709
> URL: https://issues.apache.org/jira/browse/HDFS-5709
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 3.0.0, 2.2.0
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Labels: snapshots, upgrade
> Attachments: hdfs-5709-1.patch, hdfs-5709-2.patch, hdfs-5709-3.patch,
> hdfs-5709-4.patch, hdfs-5709-5.patch, hdfs-5709-6.patch, hdfs-5709-7.patch
>
>
> Right now in trunk, upgrade fails messily if the old fsimage or edits refer
> to a directory named ".snapshot". We should at least print a better error
> message (which I believe was the original intention in HDFS-4666), and [~atm]
> proposed automatically renaming these files and directories.
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