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From "Zesheng Wu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4959) Decommission data nodes, There is no response
Date Mon, 08 Jul 2013 00:23:48 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13701710#comment-13701710
] 

Zesheng Wu commented on HDFS-4959:
----------------------------------

A simple fix may look like this, but this is not a good fix:
{code}
  public void refreshNodes() throws IOException {
    namesystem.refreshNodes();
    namesystem.checkOperation(OperationCategory.WRITE);
  }
{code}
                
> Decommission data nodes, There is no response
> ---------------------------------------------
>
>                 Key: HDFS-4959
>                 URL: https://issues.apache.org/jira/browse/HDFS-4959
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha, hdfs-client, namenode
>    Affects Versions: 2.0.5-alpha
>            Reporter: Fengdong Yu
>
> There is "dfs.hosts.exclude" configured before NN start. Active/Standby works well. 
> 1)Add two datanodes IPAddr to the exclude file on the both Active and Standby NN. 
> 2)run: hdfs dfsadmin -refreshNodes on the Active NN, but there isn't any logs in the
ActiveNN log. but decommission logs showed in the StandbyNN log.
> There is no decommission datanodes showed on the Active NN webUI. but there does have
decommission datanodes showed on the Standby NN webUI.
> But the decommission process is very very slow, it indicates it cannot finish forever.
> I do think this is a bug.

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