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From "Colin Freas" <colinfr...@gmail.com>
Subject Re: Master as DataNode
Date Fri, 21 Mar 2008 18:18:24 GMT
ah:

2008-03-21 14:06:05,526 ERROR org.apache.hadoop.dfs.DataNode:
java.io.IOException: Incompatible namespaceIDs in
/var/tmp/hadoop-datastore/hadoop/dfs/data: namenode namespaceID =
2121666262; datanode namespaceID = 2058961420


looks like i'm hitting this "Incompatible namespaceID" bug:
http://issues.apache.org/jira/browse/HADOOP-1212

is there a work around for this?

-colin


On Fri, Mar 21, 2008 at 1:50 PM, Jeff Eastman <jeff@windwardsolutions.com>
wrote:

> Check your logs. That should work out of the box with the configuration
> steps you described.
>
> Jeff
>
> > -----Original Message-----
> > From: Colin Freas [mailto:colinfreas@gmail.com]
> > Sent: Friday, March 21, 2008 10:40 AM
> > To: core-user@hadoop.apache.org
> > Subject: Master as DataNode
> >
> > setting up a simple hadoop cluster with two machines, i've gotten to the
> > point where the two machines can see each other, things seem fine, but
> i'm
> > trying to set up the master as both a master and a slave, just for
> testing
> > purposes.
> >
> > so, i've put the master into the conf/masters file and the conf/slaves
> > file.
> >
> > things seem to work, but there's no DataNode process listed with jps on
> > the
> > master.  i'm wondering if there's a switch i need to flip to tell hadoop
> > to
> > use the master as a datanode even if it's in the slaves file?
> >
> > thanks again.
> >
> > -colin
>
>
>

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