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.eqiad.wmnet vs .eqiad.wmflabs Domains
Following the steps of your tuto, it happens that the namenode being "qchris-master.eqiad.wmnet" seems to be an error ...
I followed the tuto until the end of the "setting up hadoop" section, and got it working using "qchris-master.eqiad.wmflabs" domain.
Do you mind if I update the tuto, or do I let you do it ?