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From "Mafish Liu" <maf...@gmail.com>
Subject Re: Help: how to check the active datanodes?
Date Fri, 04 Jul 2008 01:43:48 GMT
Hi, zhang:
   Once you start hadoop with shell start-all.sh, a hadoop status pape can
be accessed through http://namenode-ip:port/dfshealth. Port is specified by

in your hadoop-default.xml.
    If the datanodes status is not as expected, you need to check log files.
They show the details of failure.

On Fri, Jul 4, 2008 at 4:17 AM, Richard Zhang <richardtechzh@gmail.com>

> Hi guys:
> I am running hadoop on a 8 nodes cluster.  I uses start-all.sh to boot
> hadoop and it shows that all 8 data nodes are started. However, when I use
> bin/hadoop dfsadmin -report to check the status of the data nodes and it
> shows only one data node (the one with the same host as name node) is
> active. How could we know if all the data nodes are active precisely? Does
> anyone has deal with this before?
> Thanks.
> Richard

Institute of Computing Technology, Chinese Academy of Sciences, Beijing.

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