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https://issues.apache.org/jira/browse/HADOOP-3720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lohit Vijayarenu updated HADOOP-3720:
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Status: Open (was: Patch Available)
> dfsadmin -refreshNodes should re-read the config file.
> ------------------------------------------------------
>
> Key: HADOOP-3720
> URL: https://issues.apache.org/jira/browse/HADOOP-3720
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.19.0
> Reporter: Lohit Vijayarenu
> Assignee: Lohit Vijayarenu
> Attachments: HADOOP-3720-1.patch, HADOOP-3720-2.patch,
> HADOOP-3720-3.patch, HADOOP-3720-4.patch
>
>
> hadoop dfsadmin -refreshNodes reads files defined by _dfs.hosts_ and
> _dfs.hosts.exclude_. If these values are not defined during namenode startup,
> then refreshNodes command assumes there are no files. So, while namenode is
> running, once cannot just edit the config file and add entries to these
> config variables and expect the namenode to read them. Namenode should
> re-read the config file for these variables (_dfs.hosts_ and
> _dfs.hosts.exclude_) when refreshNodes command is invoked.
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