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https://issues.apache.org/jira/browse/HDFS-4269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Boudnik resolved HDFS-4269.
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Resolution: Fixed
Committed to branch-2. Thanks Chris.
> DatanodeManager#registerDatanode rejects all datanode registrations from
> localhost in single-node developer setup
> -----------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-4269
> URL: https://issues.apache.org/jira/browse/HDFS-4269
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 3.0.0, trunk-win, 2.0.4-beta
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Fix For: 3.0.0
>
> Attachments: HDFS-4269.1.patch, HDFS-4269.2.patch, HDFS-4269.3.patch
>
>
> HDFS-3990 is a change that optimized some redundant DNS lookups. As part of
> that change, {{DatanodeManager#registerDatanode}} now rejects attempts to
> register a datanode for which the name has not been resolved. Unfortunately,
> this broke single-node developer setups on Windows, because Windows does not
> resolve 127.0.0.1 to "localhost".
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