Hi every one. Finally this problem seems to be resolved. Our hadoop machines are not listed on our DNS, we are using /etc/hosts to asign a name to them. It seems that the aplication is issuing a DNS request for the machine name and not getting the name from /etc/hosts. All the Hadopo commands and processes use /etc/hosts normally. We have configured the Hadoop URL using headnode's IP and it register the cluster. ... View more