Thanks for the advice. It turns out that it was the firewall running
on the second cluster node.

So I stopped that and all is working correctly. Now that I have the
second node working the way that it is supposed to probably, going to
bring another couple of nodes online.

Wish me luck:)

On Nov 10, 2009, at 9:30 PM, Edmund Kohlwey wrote:

I've not encountered an error like this, but here's some suggestions:

1. Try to make sure that your two node cluster is setup correctly.
Querying the web interface, using any of the included dfs utils (eg.
hadoop dfs -ls), or looking in your log directory may yield more
useful stack traces or errors.

2. Open up the source and check out the code around the stack trace.
This sucks, but hadoop is actually pretty easy to surf through in
Eclipse, and most classes are kept within a reasonable number of
lines of code and fairly readable.

3. Rip out the parts of Nutch you need and drop them in your
project, and forget about 0.19. This isn't ideal, but you have to
remember that this whole ecosystem is still forming and sometimes it
makes sense to rip stuff out and transplant it into your project
rather than depending on 2-3 classes from a project which you
otherwise don't use.
On 11/10/09 11:32 AM, John Martyniak wrote:
Hello everyone,

I am getting this error java.io.IOException: Could not obtain
block:, when running on my new cluster. When I ran the same job on
the single node it worked perfectly, I then added in the second
node, and receive this error. I was running the grep sample job.

I am running Hadoop 0.19.2, because of a dependency on Nutch
(Eventhough this was not a Nutch job). I am not running HBase, the
version of Java is OpenJDK 1.6.0.

Does anybody have any ideas?

Thanks in advance,


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postedNov 10, '09 at 4:32p
activeNov 11, '09 at 4:51a

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John Martyniak: 2 posts Edmund Kohlwey: 1 post



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