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From Bill Au <bill.w...@gmail.com>
Subject Re: displaying decommissioned node in dfshealth.jsp
Date Thu, 05 Feb 2009 19:52:51 GMT
By name-node web UI do you mean http://name-node:50070/?  That is actually
dfshealth.jsp.  When the datanode is being decommissioned, it shows up in
the Live Datanodes table with an Admin State of "Decommission in progress".
Once it has been decommisioned, it shows up in the Dead Datanodes table.


On Thu, Feb 5, 2009 at 1:35 PM, Konstantin Shvachko <shv@yahoo-inc.com>wrote:

> Did you look at the name-node web UI?
> What does it say about decommissioned nodes?
> Thanks,
> --Konstantin
> Bill Au wrote:
>> Right now a decommissioned datanode shows up as a dead datanode in
>> dfshealth.jsp.  I went into a case where a datanode failed after I have
>> decomissioned another datanode in the same Hadoop cluster.  They both show
>> up as dead datanodes, and the operation folks don't know which is which.
>>  I
>> noticed that dfsadmin -report does show the admin state of the
>> decommissioned datanode as "Decommissioned".  So I am thinking that if we
>> add a "Admin State" column in the Dead Datanodes table in dfshealth.jsp
>> (similar to the existing Admin State column in the Live Datanodes table),
>> it
>> will be clear if a dead datanode was in service or was decommissioned.
>> The change/addition to dfshealth.jsp is simple and straight forward.  I am
>> willing to submit a patch via jira.  Should I go ahead?
>> Bill

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