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I have gotten a few comments and etc regarding whether or not I was able to get Hadoop to talk to Ganglia. Sadly I wasn't able to get this to work properly either but I did contact the Hadoop mailing list (this thread) and got the following information. There is actually a bug. The link includes a patch but note that the trunk has changed and the patch currently only works on Hadoop version 0.16.0. I have not had a chance to test everything out yet but it is at least a step in the right direction for those of you who are curious. Hope this helps.
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