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From "Wang Xu (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-5778) Help information of refreshNodes does not show how to decomission nodes
Date Wed, 06 May 2009 05:26:31 GMT
Help information of refreshNodes does not show how to decomission nodes
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                 Key: HADOOP-5778
                 URL: https://issues.apache.org/jira/browse/HADOOP-5778
             Project: Hadoop Core
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.19.1
         Environment: hadoop 0.19.1, jdk 1.6, CentOS 5.2
            Reporter: Wang Xu
            Assignee: Wang Xu
             Fix For: 0.19.2


The help information does not indicate how to decommission nodes.

It only describes two scenarios:
* to stop nodes if not in dfs.hosts
* stop decommissioning if node is decommissioning and in both dfs.hosts and dfs.host.exclude

but omits this one:
* starting decommissioning if node is in service and  in both dfs.hosts and dfs.host.exclude

It would better describe as "Each entry defined in dfs.hosts and also
in dfs.host.exclude is start decommissioning and start block replication
if it is in service, or is stopped from decommissioning if it has already
been marked for decommission."

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