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Posted to common-dev@hadoop.apache.org by "Erik Bakker (JIRA)" <ji...@apache.org> on 2008/07/18 17:04:31 UTC
[jira] Commented: (HADOOP-3499) decommission node is both in the
"Live Datanodes" with "In Service" status, and in the "Dead Datanodes" of
the dfs namenode web ui.
[ https://issues.apache.org/jira/browse/HADOOP-3499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12614743#action_12614743 ]
Erik Bakker commented on HADOOP-3499:
-------------------------------------
I have added a line to the FAQ about this: http://wiki.apache.org/hadoop/FAQ#17 No other Wiki pages seem to address decommissioning.
> decommission node is both in the "Live Datanodes" with "In Service" status, and in the "Dead Datanodes" of the dfs namenode web ui.
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-3499
> URL: https://issues.apache.org/jira/browse/HADOOP-3499
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.17.0
> Environment: linux-2.6.9
> Reporter: lixiangna
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> try to decommission a node by the following the steps:
> (1) write the hostname of node which will be decommissioned in a file (the exclude file)
> (2) specified the absolute path of the exclude file as a configuration parameter dfs.hosts.exclude.
> (3) run "bin/hadoop dfsadmin -refreshNodes".
> It is surprising that the node is found both in the "Live Datanodes" with "In Service" status, and in the "Dead Datanodes" of
> the dfs namenode web ui. When copy new data to the HDFS, its Used size is increasing as other un-decommissioned nodes.
> Obviously it is in service. Restarting the HDFS or waiting a long time(two day) havn't make the decommission yet.
> the more strange thing, If nodes are configured as the include nodes by similar steps, then these include nodes and
> the exclude node are all only in the "Dead Datanodes" lists.
> I did many times tests in both 0.17.0 and 0.15.1. The results is same. So i think there maybe bugs.
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